instruction
stringlengths 30
8.25k
| input
stringclasses 1
value | output
stringlengths 4
5.47k
|
|---|---|---|
The following are multiple choice questions (with answers).
The following six sentences are divided into four groups. Which group best represents "being resourceful and skilled in rhetoric/literary expression"
①造欣然曰:"可人也!"
②济俯伏流涕曰:"僻陋不知天子神圣,大臣尽忠,愿率先诸侯效死节."
③帝奇之,将用为谏官,以语泄乃止
④造为开示祸福,总惧,矍然若兵在颈
⑤吾欲闻新军去主意,可悉前,旧军无得进
⑥后入为兵部侍郎,以病自言,出东都留守
A. ④, ⑤, ⑥
B. ③, ⑤, ⑥
C. ①, ②, ③
D. ②, ③, ④
E. ①, ④, ⑥
F. ③, ④, ⑧
G. ②, ④, ⑤
H. ①, ③, ⑥
I. ①, ②, ⑥
J. ①, ⑤, ⑥
Answer: | G. ②, ④, ⑤ |
|
The following are multiple choice questions (with answers).
In which story does the following description appear: 'The husband stopped breastfeeding early. The mother-in-law, having a new son, treated this five-year-old boy as if he were hers alone. Whatever she did or wherever she went, the husband always followed. The husband feared her in some ways, seeing her as a mother figure.'
A. Xiaoxiao
B. The Golden Cangue
C. Husband
D. Baizi
E. Border Town
Answer: | A. Xiaoxiao |
|
The following are multiple choice questions (with answers).
Who praised Zhou Zuoren's essays highly in the introduction to 'The Second Collection of Essays' in 'The Series of Chinese New Literature'?
A. Mao Dun
B. Yu Dafu
C. Zhu Ziqing
D. Zhou Zuoren
Answer: | B. Yu Dafu |
|
The following are multiple choice questions (with answers).
What literary school did Mao Dun, Sha Ting, Ai Wu, and others belong to?
A. New Sensationalist School
B. Beijing School
C. Psychoanalytic School
D. Social Analysis School
Answer: | D. Social Analysis School |
|
The following are multiple choice questions (with answers).
Who is the author of 'Under the roofs of Shanghai'?
A. Yang Hansheng
B. Zhou Yang
C. Tian Han
D. Xia Yan
Answer: | D. Xia Yan |
|
The following are multiple choice questions (with answers).
What is Ai Wu's first and most influential and successful short story collection?
A. Banana Grove
B. Night in the South
C. A Journey to the South
D. In the Tea House of Its Fragrance
Answer: | C. A Journey to the South |
|
The following are multiple choice questions (with answers).
The novel 'Lake Side Children's Words' tells the story of a suffering family from a child's perspective. Who is the author?
A. Mao Dun
B. Lu Xun
C. Wang Tongzhao
D. Bing Xin
E. Xu Dishan
F. Zhou Zuoren
G. Feng Wenbing
Answer: | C. Wang Tongzhao |
|
The following are multiple choice questions (with answers).
'In Spring of 1936 in Taiyuan' is the report literature work of which author?
A. Mao Dun
B. Fan Changjiang
C. Qu Qiubai
D. Xia Yan
E. Song Zhide
Answer: | B. Fan Changjiang |
|
The following are multiple choice questions (with answers).
Who is the author of the work 'Sayonara Goodbye', which criticizes the Taiwanese society's worship of foreign cultures?
A. Bai Xianyong
B. Chen Ruoxi
C. Wang Zhenhe
D. Chen Yingzhen
E. Huang Chunming
Answer: | E. Huang Chunming |
|
The following are multiple choice questions (with answers).
After Huang Zunxian proposed the idea '我手写我口,古岂能拘牵.' in the late 1860s, who also proposed that poetry creation '不必与古合' and should express 'my own emotions' to oppose the imitation and revival of the ancients?
A. Qiu Fengjia
B. Zheng Guanying
C. Lin Zexu
D. Gong Zizhen
E. Wang Tao
Answer: | E. Wang Tao |
|
The following are multiple choice questions (with answers).
Where was Huang Xiaopei's 'Five Days of Wind' serialized?
A. Nanyue News
B. New Fiction
C. Novel Forest
D. Game News
E. New Youth
Answer: | A. Nanyue News |
|
The following are multiple choice questions (with answers).
Using the contact method to measure the aperture of a steel part, the aperture is $D = 8 \, \text{mm}$, the material of the measuring ball is diamond, the ball diameter is $d = 4 \, \text{mm}$, and the contact force is $F = 0.2 \, \text{N}$. Using the absolute measurement method, the measuring ball first contacts one hole wall and then the other hole wall.Determine the measurement error of the aperture caused by local elastic deformation.
A. $(50.0\sim 67.6)\mu m$
B. $(0.1\sim 0.5)\mu m$
C. $(18.4\sim 24.2)\mu m$
D. $(0.57\sim 5.1)\mu m$
E. $(0.13\sim 0.17)\mu m$
F. $(12.5 \sim 17.2)\mu m$
G. $(30.0\sim 50.0)\mu m$
H. $(0\sim 0.1)\mu m$
I. $(25.0 \sim 29.6)\mu m$
J. $(5.5\sim 11.0)\mu m$
Answer: | E. $(0.13\sim 0.17)\mu m$ |
|
The following are multiple choice questions (with answers).
A Hall element has dimensions $L = 10 \, \text{mm}$, $W = 3.5 \, \text{mm}$, and $d = 1.0 \, \text{mm}$. A current $I = 1.0 \, \text{mA}$ is applied along the $L$ direction, and a uniform magnetic field $B = 0.3 \, \text{T}$ is applied perpendicular to both $L$ and $W$. Given the sensitivity of $22 \, \text{V/(AT)}$, determine the carrier concentration.
A. $2.84 \times 10^{20} mol/m^{3}$
B. $4.72 \times 10^{-5} mol/m^{3}$
C. $2.84 \times 10^{14} mol/m^{3}$
D. $2.84 \times 10^{17} mol/m^{3}$
E. $4.72 \times 10^{-3} mol/m^{3}$
F. $2.84 \times 10^{-4} mol/m^{3}$
G. $8.21 \times 10^{-4} mol/m^{3}$
H. $6.87 \times 10^{-4} mol/m^{3}$
I. $4.72 \times 10^{-4} mol/m^{3}$
J. $3.58 \times 10^{-5} mol/m^{3}$
Answer: | I. $4.72 \times 10^{-4} mol/m^{3}$ |
|
The following are multiple choice questions (with answers).
Given a parallel-plate capacitive displacement sensor with plate dimensions $a = b = 4 \, \text{mm}$, gap $d_0 = 0.5 \, \text{mm}$, and air as the dielectric between the plates. If the plates are moved $2 \, \text{mm}$ in the $x$ direction, determine the capacitance at this position.
A. $C=2.047pF$
B. $C=3.951pF$
C. $C=14.215pF$
D. $C=2.168pF$
E. $C=0.142pF$
F. $C=8.013pF$
G. $C=6.328pF$
H. $C=21.002pF$
I. $C=10.239pF$
J. $C=0.624pF$
Answer: | E. $C=0.142pF$ |
|
The following are multiple choice questions (with answers).
What is the main purpose of setting up the upper watertight in bulk carriers?
A. To enhance ship strength
B. To increase ballast water tanks
C. To ensure cleaning of cargo holds
D. To facilitate cargo hold cleaning
Answer: | C. To ensure cleaning of cargo holds |
|
The following are multiple choice questions (with answers).
The most distinctive feature of an icebreaker is
A. Having large ballast tanks
B. Having intermediate ribs
C. Small draft
D. Specially reinforced fore peak tank
Answer: | A. Having large ballast tanks |
|
The following are multiple choice questions (with answers).
Registered depth is the vertical distance measured at the midpoint of registered length from the _____ surface of the flat plate keel to the _____ surface of the upper deck
A. Lower/Upper
B. Upper/Upper
C. Upper/Lower
D. Lower/Lower
Answer: | C. Upper/Lower |
|
The following are multiple choice questions (with answers).
If Roman numerals are used for ship's draft marks, the height of the numbers should be
A. 6 in
B. 12 in
C. 3 in
D. 9 in
Answer: | A. 6 in |
|
The following are multiple choice questions (with answers).
For the transverse framing system of ship hull structure, the correct description is: longitudinal members are arranged _____, transverse members are arranged _____
A. Sparsely and large/densely and small
B. Densely and small/sparsely and large
C. Densely and large/sparsely and large
D. Densely and small/densely and large
Answer: | A. Sparsely and large/densely and small |
|
The following are multiple choice questions (with answers).
Which of the following descriptions about transverse framing system is incorrect?
A. Less cargo hold volume loss
B. Commonly used in coastal medium and small ships
C. Easy to construct
D. Relatively lighter ship weight
Answer: | D. Relatively lighter ship weight |
|
The following are multiple choice questions (with answers).
The shell plating consists of
A. Flat plate keel, bottom strakes, frame strakes, side strakes
B. Keel, flat plate keel, bottom strakes, side strakes
C. Flat plate keel, bottom strakes, deck strakes
D. Keel, bottom strakes, side strakes, deck strakes
Answer: | C. Flat plate keel, bottom strakes, deck strakes |
|
The following are multiple choice questions (with answers).
The shell plate marked 'port side E strake No.5 plate' is numbered as
A. 5PE
B. PE5
C. P5E
D. EP5
Answer: | B. PE5 |
|
The following are multiple choice questions (with answers).
Along the ship's length, deck plating within _____ length amidships is _____, gradually becoming _____ towards bow and stern
A. 0.75/thinner/thicker
B. 0.75/thicker/thinner
C. 0.4/thicker/thinner
D. 0.4/thinner/thicker
Answer: | D. 0.4/thinner/thicker |
|
The following are multiple choice questions (with answers).
In a defensive battle, a friendly army division encountered the following situation with the enemy's main force attack: The enemy is attacking from the north with their main armored forces, attempting to break through the defense line. Our forces are deployed in two echelons in defensive depth, with the first echelon being the main force and the second echelon being the reserve. The first echelon troops are under heavy fire, and breakthrough points have appeared in the position. Enemy armored forces have penetrated 6 kilometers deep and are attempting to expand from the breakthrough point. Current nighttime visibility is limited, with below-freezing temperatures. We have an anti-tank missile battalion and an artillery regiment available for support. As the commander, which of the following measures would be most reasonable and actively improve the situation:
A. Deploy anti-tank missile battalion firepower to seal off the breakthrough point, while using artillery fire to strike the enemy's follow-up forces in depth
B. Order the first echelon to withdraw to the second defensive line, working with the second echelon to construct a new defensive position
C. Adjust the first echelon's defensive deployment, using successive resistance to delay the enemy's assault speed
D. Command the second echelon to launch a counterattack from the flanks while suppressing the enemy's follow-up forces at the breakthrough point with artillery fire
E. Command the reserve force to quickly maneuver to set up an ambush behind the enemy armored forces, cutting off their connection with the main force before launching an attack
F. Direct concentrated artillery coverage at the breakthrough point while both first and second echelons conduct a frontal counterattack
G. First echelon continues to hold position while second echelon splits into two routes for encirclement, with artillery conducting echeloned strikes on enemy depth targets
H. Distribute the anti-tank missile battalion to frontline units, adopting dispersed positions with mutual support firing tactics
I. Immediately commit the reserve force to coordinate with the first echelon troops, engaging in intense combat with the enemy at the breakthrough point
J. Keep the second echelon on standby in place, order the first echelon to move to both flanks, forming a crescent-shaped encirclement
Answer: | D. Command the second echelon to launch a counterattack from the flanks while suppressing the enemy's follow-up forces at the breakthrough point with artillery fire |
|
The following are multiple choice questions (with answers).
Which of the following descriptions about floriculture tasks are incorrect? (Include all incorrect options)
I. Floriculture includes controlling plant environments, managing inventory and shipping, and designing floral arrangements.
II. Floriculture involves keeping business records and diagnosing plant problems.
III. Floriculture focuses only on maintaining and repairing facilities.
IV. Floriculture is unrelated to soil preparation or product sales.
V. Floriculture tasks include preparing planting media, applying fertilizers and chemicals, and harvesting plants.
VI. Floriculture has no connection to business management, store operations, or customer service.
VII. Designing and creating floral arrangements is the only key task of floriculture.
VIII. Floriculture management focuses solely on internal facility operations and has no link to commerce or sales activities.
IX. Floriculture requires integrating environmental control and pest management without involving planting or harvesting.
X. Floriculture tasks encompass all the above descriptions.
A. I, II, IV, V, and IX
B. III, IV, and VI
C. I, IV, VII, and VIII
D. IV, VI, VII, and VIII
E. V, IX, and X
F. II, V, and VIII
G. IV, VI, and VII
H. I and II
I. Only IV
J. III, VI, VII, and VIII
Answer: | D. IV, VI, VII, and VIII |
|
The following are multiple choice questions (with answers).
A company plans to build a new factory to expand the production of a certain product. According to market forecasts, the probability of good product sales is 0.7, and the probability of poor sales is 0.3. There are three options to choose from:Option 1: Build a large factory, requiring an investment of 3 million yuan. Based on estimates, with good sales, the annual profit would be 1 million yuan; with poor sales, the annual loss would be 200,000 yuan. The service period is 10 years.Option 2: Build a small factory, requiring an investment of 1.4 million yuan. Based on estimates, with good sales, the annual profit would be 400,000 yuan; with poor sales, the annual profit would still be 300,000 yuan. The service period is also 10 years.Option 3: First build a small factory, then expand it after three years if sales are good, requiring an additional investment of 2 million yuan with a service period of 7 years, estimating an annual profit of 950,000 yuan.Calculate the expected returns for all three options.
A. Plan 1 is 3400000,Plan 2 is 2150000,Plan 3 is 3595000
B. Plan 1 is 3400000,Plan 2 is 2300000,Plan 3 is 2895000
C. Plan 1 is 932500,Plan 2 is 873500, Plan 3 is 1357700
D. Plan 1 is 3400000,Plan 2 is 2300000, Plan 3 is 3595000
E. Plan 1 is 3400000,Plan 2 is 2300000, Plan 3 is 1255000
F. Plan 1 is 3200000,Plan 2 is 2100000,Plan 3 is 3450000
G. Plan 1 is 3400000,Plan 2 is 2500000,Plan 3 is 3595000
H. Plan 1 is 3600000,Plan 2 is 2300000,Plan 3 is 3595000
I. Plan 1 is 3400000,Plan 2 is 2300000,Plan 3 is 4095000
J. Plan 1 is 3250000,Plan 2 is 2300000,Plan 3 is 3595000
Answer: | D. Plan 1 is 3400000,Plan 2 is 2300000, Plan 3 is 3595000 |
|
The following are multiple choice questions (with answers).
Walmart sells a large number of items at low prices while providing outstanding service and guarantees. Southwest Airlines charges 1/3 of its competitors' prices while offering comfortable flights and excellent friendly service, all of which is genuine. Southwest Airlines has become the only profitable airline in the United States. Dell Computer Company, a direct computer company, offers high-quality personal computers and excellent service to buyers at prices much lower than its retail-oriented competitors. Its sales and profits far exceed those of its competitors. Based on these materials, which of the following statements are correct ( ).I. These companies adopt a demand-oriented pricing strategyII. These companies adopt a cost-oriented pricing strategyIII. These companies face strong pressure from competitors and cannot maintain their original market share, so they adopt low pricesIV. The pricing reflects contemporary consumers' strong desire for value for moneyV. Value-based pricing is not just about selling products at lower prices than competitors; it represents an adjustment to company operations
A. I, III and IV
B. I ,II
C. I, II and IV
D. III, IV and V
E. II, III and V
F. I, II and V
G. I,Ⅳ and Ⅴ
H. II, III and IV
Answer: | G. I,Ⅳ and Ⅴ |
|
The following are multiple choice questions (with answers).
Company A is a newly established management consulting firm that is small in scale but growing rapidly; Company B is a long-established large building materials manufacturing enterprise with well-developed management systems and has accumulated extensive historical human resources statistical data. The appropriate human resource planning methods that Company A and Company B should adopt respectively are ().I. Experience statistical method, Labor quota methodII. Ratio trend analysis method, Econometric model methodIII. Experience statistical method, Ratio trend analysis methodIV. Ratio trend analysis method, Statistical forecasting methodV. Econometric model method, Labor quota method
A. I and II
B. II and III
C. III and V
D. II and IV
E. IV and V
F. I and V
G. I and III
H. II and V
I. III and IV
J. I and IV
Answer: | G. I and III |
|
The following are multiple choice questions (with answers).
One of the basic principles of strategic management is that managers adjust strategies according to environmental changes. When the global economic environment deteriorates, for export-oriented manufacturing enterprises, appropriate measures include ( ).I. Actively pursue export tax rebate policiesII. Reduce expenses and control costsIII. Sell idle assets and reduce unnecessary expendituresIV. Upgrade production lines and expand production capacityV. Actively develop domestic markets
A. I,II and V
B. II,III and IV
C. I,III,IV and V
D. II,III and V
E. III,V and IV
F. I,III and IV
G. III and IV
H. I,II and III
I. II,IV and V
J. I,IV and V
Answer: | G. III and IV |
|
The following are multiple choice questions (with answers).
Among the ship's resistance, it belongs to the differential pressure resistance
A. Wave resistance and air resistance
B. Frictional resistance and wave resistance
C. Wave-breaking resistance and viscous resistance
D. Compressive resistance and induced resistance
E. Surface resistance and pressure resistance
F. Frictional resistance and viscous resistance
G. Frictional resistance and texture resistance
H. Viscous resistance and wave resistance
I. Fluid resistance and eddy current resistance
Answer: | H. Viscous resistance and wave resistance |
|
The following are multiple choice questions (with answers).
When changing the prismatic coefficient while keeping the displacement and length constant, the following describes the correct effect on the resistance (all correct options must be included)
(1) It has little effect on frictional resistance
(2) At low speed, the prismatic coefficient is small and the residual resistance is small
(3) At medium speed, the prismatic coefficient is small and the residual resistance is small
(4) At high speed, the prismatic coefficient is small and the residual resistance is small
A. (2)(4)
B. (1)(2)(3)(4)
C. (1)(2)
D. (1)(4)
E. (2)(3)(4)
F. (1)(2)(3)
G. (1)(2)(4)
H. (1)(3)(4)
I. (2)(3)
J. (1)(3)
Answer: | F. (1)(2)(3) |
|
The following are multiple choice questions (with answers).
Constant pitch propellers
A. The pressure distribution may be the same at all radius
B. The pitch angle is different at each radius
C. The velocity is the same but the angle of attack is different at each radius
D. The pitch and pitch angle are different at each radius
E. The pitch may be different at each radius
F. Pressure distribution may be different at each radius
G. The lift and drag coefficients are the same at all radius
Answer: | B. The pitch angle is different at each radius |
|
The following are multiple choice questions (with answers).
Timber ships are characterized by (pick all the right options): :(1) the cargo hold is required to be long and large; (2) There are no pillars in the cabin; (3) There are columns on both sides of the deck; (4) The bulwarks are also higher; (5) The cargo lifters are installed on the mast platform
A. (2)(3)
B. (1)(3)(4)
C. (1)(3)(5)
D. (1)(4)(5)
E. (1)(2)(4)
F. (2)(3)(4)
G. (1)(2)(3)
H. (1)(2)
I. (2)(4)
J. (1)(2)(3)(4)(5)
Answer: | J. (1)(2)(3)(4)(5) |
|
The following are multiple choice questions (with answers).
The flat keel is within the length range: (1) the width remains the same; (2) the thickness remains the same; (3) The thickness varies with different positions; (4) The width varies with the location
A. (1)(3)(4)
B. (1)(4)
C. (2)(3)
D. (1)(2)
E. (1)(2)(4)
F. (1)(3)
G. (1)(2)(3)(4)
H. (2)(4)
I. (1)(2)(3)
J. (2)(3)(4)
Answer: | F. (1)(3) |
|
The following are multiple choice questions (with answers).
Ribs can be divided into (select all the correct options) according to their force magnitude:(1) ordinary ribs; (2) interdeck ribs; (3) main bone: (4) apical cabin bone; (5) Strong ribs
A. (2)(3)
B. (2)(4)
C. (2)(3)(4)
D. (1)(2)(4)
E. (1)(3)(5)
F. (1)(4)(5)
G. (1)(2)
H. (1)(2)(3)
I. (1)(2)(3)(4)(5)
Answer: | E. (1)(3)(5) |
|
The following are multiple choice questions (with answers).
The advantages of the mountain anchor are (pick all the correct options) :(1) easy to collect; (2) It is convenient to throw and anchor; (3) It is not easy to take the anchor; (4) It can be used universally
A. (1)(2)(3)(4)
B. (2)(3)(4)
C. (1)(2)
D. (1)(2)(3)
E. (2)(4)
F. (1)(2)(4)
G. (1)(3)(4)
H. (1)(3)
I. (1)(4)
J. (2)(3)
Answer: | F. (1)(2)(4) |
|
The following are multiple choice questions (with answers).
In the following concepts regarding the in agricultral machinery, which of the following statements are incorrect? (Need to include all incorrect options):
(1). DEM simulations treat soil and crops as a continuum, much like traditional finite element analysis, providing a less practical approach to analyzing interactions between agricultural machinery and discrete matter.
(2). Blanched fruits and vegetables have higher color attributes than non-blanched ones because of thermal inactivation of undesirable enzymes (peroxidase and lipoxygenase), and a resultant decrease in the rate of enzymatic deterioration of fruits and vegetables. Furthermore, blanching can also limit the degradation of both chlorophylls and carotenoids. However, the blanching treatment causes undesirable changes in the properties of the food, such as the loss of soluble nutrients (sugars, minerals, and vitamins). Moreover, it causes loss of aroma and negatively impacts the sensory properties associated with texture.
(3). Accurate material models for fibrous biological materials are readily available and widely used in in silico design of agricultural machinery, enabling precise simulation of crop-machine interactions and optimizing machine settings.
(4). Rapid drying at high temperatures is the most effective method for lowering grain moisture content from 25% to 15%, preventing internal tensions and cracks that compromise grain integrity.
(5). Dehydration involves solely applying heat to food materials without removing moisture, relying on thermal drying to preserve fruits and vegetables by accelerating moisture-mediated deterioration reactions.
A. (1) and (3)
B. only (4)
C. (1), (3), (4), and (5)
D. only (5)
E. (1)
F. only (2)
G. All of the above
H. only (3)
I. only (1)
J. (5), (4), and (2)
Answer: | C. (1), (3), (4), and (5) |
|
The following are multiple choice questions (with answers).
In the following concepts regarding the in agricultral machinery, which of the following statements are incorrect? (Need to include all incorrect options):
I. Controlled Traffic Farming (CTF) aims to maximize the area of permanent traffic lanes and soil compaction to achieve increased productivity through concentrated machinery usage.
II. Roller conditioners work by applying intermittent pressure on the plants by passing the forage between two rollers with studs or a grooved profile, the rollers spin in opposite directions at a speed in the order of three to four times that of the ground speed of the machine. They crush and shatter the stalks, opening pathways to release the water content of the plant tissue. By regulating the approximation and the pressure of the rollers, the level of conditioning of the rollers can be chosen and differentiated from that of the leaves, obtaining forage with a larger amount of leaves and therefore greater digestibility and protein value.
III. The force required to compress fibrous biological material is solely rate-independent, unaffected by the speed of compression, simplifying the modeling of their mechanical behavior.
IV. As a discontinuous numerical simulation method for the analysis of discrete matter, compared with the traditional finite element analysis, the DEM no longer regards soil andcropsascontinuum,butasdiscretematterforanalysis.Comparedwithcontinuum theory, DEM is more practical. The interaction between agricultural machinery and soil/crops is studied from the particle micro level by using the DEM, which makes the optimization and improvement of agricultural machinery a big step forward.
V. Minimizing pump efficiency and disregarding energy rate periods are key strategies for optimizing energy costs in pressurized irrigation systems, particularly when groundwater is the primary source.
A. only I
B. I, III, and V
C. III, V, and II
D. I and III
E. III and II
F. only II
G. only V
H. I
I. II and IV
J. I, V, II, and IV
Answer: | B. I, III, and V |
|
The following are multiple choice questions (with answers).
Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. The working fluid is refrigerant-134a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.32 MPa. Part of the refrigerant evaporates during this flashing process, and this vapor is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure and cools the refrigerated space as it vaporizes in the evaporator. Assuming the refrigerant leaves the evaporator as a saturated vapor and both compressors are isentropic, determine the amount of heat removed from the refrigerated space and the compressor work per unit mass of refrigerant flowing through the condenser
A. 144.8 kJ/kg, 33.91 kJ/kg
B. 143.5 kJ/kg, 31.89 kJ/kg
C. 138.9 kJ/kg, 29.76 kJ/kg
D. 155.2 kJ/kg, 34.23 kJ/kg
E. 146.3 kJ/kg, 32.68 kJ/kg
F. 141.8 kJ/kg, 30.95 kJ/kg
G. 149.7 kJ/kg, 33.45 kJ/kg
H. 152.4 kJ/kg, 35.12 kJ/kg
I. 142.1 kJ/kg, 34.82 kJ/kg
J. 150.6 kJ/kg, 31.54 kJ/kg
Answer: | E. 146.3 kJ/kg, 32.68 kJ/kg |
|
The following are multiple choice questions (with answers).
Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. Each stage operates on an ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where both streams enter at about 0.32 MPa. (In practice, the working fluid of the lower cycle is at a higher pressure and temperature in the heat exchanger for effective heat transfer.) If the mass flow rate of the refrigerant through the upper cycle is 0.05 kg/s, determinethe coefficient of performance of this cascade refrigerator
A. 4.46
B. 2.98
C. 4.15
D. 4.73
E. 4.92
F. 3.84
G. 3.57
H. 3.25
I. 5.12
J. 5.31
Answer: | A. 4.46 |
|
The following are multiple choice questions (with answers).
Using Woschni's in-cylinder heat transfer correlation, evaluate the percentage increase in heat transfer expected in an engine with a mean piston speed of 10 m/'s when the swirl ratio is raised from 0 to 5. Do your
comparison for the intake process only. The engine bore is 0.15 m and the engine speed is 2000 rev/min.
A. 40%
B. 300%
C. 75%
D. 100%
E. 200%
F. 90%
G. 500%
H. 25%
I. 400%
J. 60%
Answer: | A. 40% |
|
The following are multiple choice questions (with answers).
Diesel fuel is injected as a liquid at room temperature into air at 50 bar and 800 K, close to TC at the end of compression. If the overall equivalence ratio is 0.7, estimate the reduction in average air temperature which would occur when the fuel is fully vaporized and uniformly mixed. Assume such mixing takes place at constant volume prior to any combustion.
A. 72 K
B. 38 K
C. 45 K
D. 52 K
E. 95 K
F. 17 K
G. 84 K
H. 60 K
I. 32 K
J. 25 K
Answer: | H. 60 K |
|
The following are multiple choice questions (with answers).
The swirl ratio at the end of induction at 2000 rev/min in a direct-injection diesel engine of bore $= \mathrm{s t r o k e}=1 0 0$ mm is 4.0. There is an average tangential velocity (evaluated at the inlet valve-axis radial location) required to give this swirl ratio. What is the ratio of this velocity to the mean piston speed and to the mean flow velocity through the inlet valve estimated from the average valve open area and open time?
A. 2.9, 0.3
B. 5.0, 0.6
C. 4.0, 0.5
D. 5.2, 0.6
E. 6.3, 0.8
F. 3.8, 0.4
G. 4.5, 0.5
H. 8.0, 1.0
I. 5.7, 0.7
J. 7.1, 0.9
Answer: | E. 6.3, 0.8 |
|
The following are multiple choice questions (with answers).
A flue gas at 1-atm total pressure and a temperature of 1400 K contains $\mathrm{C O_{2}}$ and water vapor at partial pressures of 0.05 and 0.10 atm, respectively. If the gas flows through a long flue of 1-m diameter and 400 K surface temperature, determine the net radiative heat flux from the gas to the surface. Blackbody behavior may be assumed for the surface.
A. $\mathrm{98 kW/m^2}$
B. $\mathrm{-600 kW/m^2}$
C. $\mathrm{110 kW/m^2}$
D. $\mathrm{62 kW/m^2}$
E. $\mathrm{-120 kW/m^2}$
F. $\mathrm{45 kW/m^2}$
G. $\mathrm{82 kW/m^2}$
H. $\mathrm{155 kW/m^2}$
I. $\mathrm{75 kW/m^2}$
J. $\mathrm{-135 kW/m^2}$
Answer: | A. $\mathrm{98 kW/m^2}$ |
|
The following are multiple choice questions (with answers).
A radiator on a proposed satellite solar power station must dissipate heat being generated within the satellite by radiating it into space. The radiator surface has a solar absorptivity of 0.5 and an emissivity of 0.95. What is the equilibrium surface temperature when the solar irradiation is $\mathrm{1000 W/m^2}$ and the required heat dissipation is $\mathrm{1500 W/m^2}$?
A. $\mathrm{475 K}$
B. $\mathrm{425 K}$
C. $\mathrm{452 K}$
D. $\mathrm{332 K}$
E. $\mathrm{412 K}$
F. $\mathrm{395 K}$
G. $\mathrm{439 K}$
H. $\mathrm{385 K}$
I. $\mathrm{467 K}$
J. $\mathrm{405 K}$
Answer: | G. $\mathrm{439 K}$ |
|
The following are multiple choice questions (with answers).
From different value perspectives, criminal intelligence can be classified into the following () types:
I. Strategic Intelligence
II. Tactical Intelligence
III. Operational Intelligence
IV. Action Intelligence
A. II
B. I,II,IV
C. II,III
D. I,II,III
E. I,II
F. II,IV
G. II,III,IV
H. III
I. IV
J. I,IV
Answer: | B. I,II,IV |
|
The following are multiple choice questions (with answers).
Li (surname) is commonly known by four names: "Cripple", "Little Snow", "Master Detective" and "Globe Trotter". When registering aliases and nicknames, all related names need to be recorded. Therefore, Li's aliases and nicknames should be registered as:
I. Cripple
II. Little Snow
III. Master Detective
IV. Globe Trotter
A. I,II
B. II,III,IV
C. I,II,III
D. III,IV
E. I,IV
F. I,III,IV
G. II,IV
H. I,II,III,IV
I. I,II,IV
J. I,III
Answer: | C. I,II,III |
|
The following are multiple choice questions (with answers).
Which of the following statements is incorrect:
Ⅰ According to importance level, management information can be classified into strategic information, tactical information, and operational information
Ⅱ According to importance level, management information can be classified into external information and internal information
Ⅲ Information is the foundation for knowledge
Ⅳ Information is the foundation for data
Ⅴ Compared to traditional management information systems, strategic information systems place more emphasis on the external environment of enterprises
Ⅵ Enterprise information systems are expanding in scale, becoming more detailed in specific areas, and becoming more socially oriented
A. IV,V
B. III,V
C. III,IV,V
D. I,IV,VI
E. I,II,IV
F. I,III,V
G. II,III
H. II,IV,VI
I. I,V
J. II,III,IV
Answer: | J. II,III,IV |
|
The following are multiple choice questions (with answers).
The differences between meeting minutes and decisions are manifested in:
I. Completely different nature
II. Completely different functions
III. Different content
IV. Different formation process
V. Different document relationships
A. I,II,V
B. I,III,IV
C. I,IV,V
D. III,IV,V
E. II,IV,V
F. II,III,IV
G. I,III,V
H. II,III,V
I. I,II,III,IV
J. III,V
Answer: | D. III,IV,V |
|
The following are multiple choice questions (with answers).
The basic characteristics of management principles include:
I. Objective Scientific Nature
II. Universal Applicability
III. Relative Stability
IV. Integration with Practice
V. Comprehensive Correlation
A. II,IV,V
B. I,III,IV,V
C. II,III,V
D. I,III,V
E. I,II,III
F. II,III,IV
G. III,IV,V
H. I,II,IV,V
I. I,II,III,IV
J. I,II,III,IV,V
Answer: | I. I,II,III,IV |
|
The following are multiple choice questions (with answers).
The allocation of information resources should be considered from the following aspects:
I. Basic principles of information resource allocation
II. Economic benefits of information resources
III. Target model for information resource allocation
IV. Strategies for implementing optimal allocation of information resources
A. I,III,II
B. II
C. I,II
D. I,III,IV
E. II,I,IV
F. III,IV,I
G. I,II,IV
H. II,III,IV
I. I,II,III,IV
J. I,II,III
Answer: | D. I,III,IV |
|
The following are multiple choice questions (with answers).
The main tasks of information system project planning include the following aspects:
I. Problem Definition
II. Project Feasibility Assessment
III. Requirements Analysis
IV. Project Schedule Planning
A. I,III
B. IV
C. I,III,IV
D. III,IV
E. I,II,IV
F. I,II,III
G. I,III,IV,V
H. II
I. II,III,IV
Answer: | E. I,II,IV |
|
The following are multiple choice questions (with answers).
The essential information capabilities of Chinese government informatization (e-governance) include:
I. Accuracy
II. Uniqueness
III. Storage, processing and analysis of data, information handling
IV. Information utilization
A. I,II,III
B. I,II,IV
C. II,III,IV
D. I,III,IV
E. III
F. I,II
G. III,IV
H. II,III
I. II,IV
J. I,IV
Answer: | D. I,III,IV |
|
The following are multiple choice questions (with answers).
The most basic CIO models include the following 3 types:
I. Strategic/Tactical Model
II. Internal/External Model
III. Production Model
IV. Extinction Model
A. II
B. I,II,III
C. III,IV
D. I,II,IV
E. I,III,IV
F. II,III,IV
G. I,II
H. IV
I. I
J. III
Answer: | D. I,II,IV |
|
The following are multiple choice questions (with answers).
The characteristics of business management information systems include:
I. Solving information management problems from a systems perspective
II. Based on modern information tools such as computers
III. Database processing systems
IV. Online transaction processing systems
A. I,II,IV
B. I,II,III,IV
C. I,III,IV
D. I,IV
E. II,III
F. I,II
G. II,IV
H. III,IV
I. II,III,IV
J. I,II,III
Answer: | A. I,II,IV |
|
The following are multiple choice questions (with answers).
Steam enters a converging-diverging nozzle at 2 MPa and 400°C with a negligible velocity and a mass flow rate of 2.5 kg/s, and it exits at a pressure of 300 kPa. The flow is isentropic between the nozzle entrance and throat, and the overall nozzle efficiency is 93 percent. Based on this information, choose the correct combination of answers:
What are the throat area, exit area, Mach number at the throat, and at the nozzle exit, respectively?
A. 10.34 cm², 18.20 cm², 1.003, 1.805
B. 10.35 cm², 18.25 cm², 1.005, 1.807
C. 10.32 cm², 18.22 cm², 1.003, 1.805
D. 10.32 cm², 18.21 cm², 1.002, 1.803
E. 10.31 cm², 18.24 cm², 1.001, 1.803
F. 10.30 cm², 18.20 cm², 1.000, 1.800
G. 10.33 cm², 18.22 cm², 1.002, 1.805
H. 10.32 cm², 18.23 cm², 1.003, 1.805
I. 10.33 cm², 18.21 cm², 1.002, 1.804
J. 10.34 cm², 18.23 cm², 1.004, 1.806
Answer: | I. 10.33 cm², 18.21 cm², 1.002, 1.804 |
|
The following are multiple choice questions (with answers).
Ecological strategies refer to the survival and living strategies adopted by organisms based on long-term adaptation to environmental changes, mainly including reproductive strategies, feeding strategies, escaping predation strategies, population diffusion strategies, etc. The most representative of these is the K-r strategy. Which influencing factor is characterized by large changes and instability in the r-strategy, but stable over time in the K-strategy? Which influencing factor is characterized by rapid development in the r-strategy, while the opposite is true for the K-strategy?
A. The two influencing factors are quantity and intraspecific competition.
B. The two influencing factors are quantity and interspecific competition.
C. The two influencing factors are quantity and reproductive rate.
D. The two influencing factors are quantity and environmental variability.
E. The two influencing factors are intraspecific competition and number
F. The two influencing factors are selection tendenc and survival time.
G. The two influencing factors are quantity and selection tendency.
H. The two influencing factors are quantity and survival time.
I. The two influencing factors are quantity and environmental stability.
J. The two influencing factors are Death and selection tendency.
Answer: | G. The two influencing factors are quantity and selection tendency. |
|
The following are multiple choice questions (with answers).
What is the delay times of TTL gates compared to CMOS gates?
A. 2 to 4 times slower
B. 4 to 8 times faster
C. 4 to 9 times faster
D. 5 to 10 times slower
E. 2 to 4 times faster
F. 7 to 14 times faster
G. 3 to 6 times faster
H. 3 to 5 times faster
I. 5 to 10 times faster
J. 6 to 12 times faster
Answer: | I. 5 to 10 times faster |
|
The following are multiple choice questions (with answers).
Management theorist Peter Drucker believes that a company's purpose and mission must be transformed into corporate objectives, and managers at all levels must lead by establishing goals through consultation with their subordinates, so that everyone works together to achieve the company's overall objectives. If a task has no specific goal, it will certainly be neglected. If an enterprise lacks aligned sub-goals to guide the work of managers at various levels, the larger the enterprise becomes and the more personnel it has, the greater the possibility of conflicts and waste. This passage demonstrates ().
A. Corporate goals should be set by top management in consultation with all levels of the organization
B. Corporate goals should be set by top management without consultation with lower levels
C. A goal system established through management by objectives is a necessary and sufficient management method
D. The more goals an enterprise has, the better its performance
E. Enterprises must have goals, but not necessarily purpose and mission
F. A goal system established through management by objectives is a better management method
G. Corporate goals should be set by top management in consultation with all levels of the organization, but not necessarily through a formal goal system
H. Corporate goals should be set by the board of directors
Answer: | F. A goal system established through management by objectives is a better management method |
|
The following are multiple choice questions (with answers).
The maximum length refers to the horizontal distance between the foremost and aftermost points including _____
A. Shell plating
B. Structural bulkheads and external hull components
C. Structural bulkheads and shell plating
D. Structural bulkheads
E. Structural bulkheads and internal hull components
F. Internal hull components
G. Structural frames
H. Structural bulkheads and frames
Answer: | F. Internal hull components |
|
The following are multiple choice questions (with answers).
In a temperature measurement system using LM35 sensor and ADC0801, if the reference voltage ($V_{ref}$) needed is 2.56V for an 8-bit ADC with 10mV resolution per bit, what voltage input ($V_{in}$) is required for the ADC0801?
A. $1.12V
B. $1.92V
C. $1.28V
D. $1.04V
E. $0.80V
F. $1.44V
G. $2.56V
H. $0.32V
I. $0.64V
J. $1.60V
Answer: | C. $1.28V |
|
The following are multiple choice questions (with answers).
Assuming solids are divided into two categories: 100% metal iron meteorites and silicate rocks containing 10% iron, and assuming the solar system has the same metal content as Earth, what proportion of total meteorite mass is iron to stone?
A. 0.85
B. 0.77
C. 0.75
D. 0.72
E. 0.78
F. 0.79
G. 0.74
H. 0.70
I. 0.80
J. 0.76
Answer: | C. 0.75 |
|
The following are multiple choice questions (with answers).
Consider a simplified Earth model with three uniform layers: total radius 6400 km, upper crust depth 600 km, entire mantle depth 2900 km, and core radius 3500 km. If $v_p=9$ km/s in upper mantle and core, and $v_p=12$ km/s in lower mantle, what is the epicentral range of triple phases obtained from core shadow zone and mantle phase transitions?
A. The triple range is 11.54° to 50.52°
B. The triple range is 11.54° to 49.02°
C. The triple range is 11.54° to 49.52°
D. The triple range is 11.54° to 47.02°
E. The triple range is 11.54° to 53.02°
F. The triple range is 11.54° to 51.02°
G. The triple range is 11.54° to 50.02°
H. The triple range is 11.54° to 48.02°
I. The triple range is 11.54° to 52.02°
J. The triple range is 11.54° to 50.12°
Answer: | G. The triple range is 11.54° to 50.02° |
|
The following are multiple choice questions (with answers).
If inner core entropy is constant and the core solidifies at an average temperature of 4400K, and latent heat is released uniformly over 4.5 billion years, what is its release rate?
A. $4.6\times10^{11}$ W
B. $4.6\times10^{9}$ W
C. $4.6\times10^{13}$ W
D. $4.6\times10^{10}$ W
E. $4.6\\times10^{12}$ W
F. $4.6\times10^{14}$ W
G. $4.6\times10^{15}$ W
H. $4.6\times10^{16}$ W
I. $4.6\times10^{11.5}$ W
J. $4.6\times10^{11.2}$ W
Answer: | A. $4.6\times10^{11}$ W |
|
The following are multiple choice questions (with answers).
In an air conditioning refrigerator, the energy that must be added to make the refrigerator run is about what percentage of the heat to be removed from the air conditioning room?
A. 26%
B. 23%
C. 22%
D. 21%
E. 25%
F. 24%
G. 15%
H. 19%
I. 20%
J. 18%
Answer: | I. 20% |
|
The following are multiple choice questions (with answers).
There is a two-stage compression one-throttling ammonia-22 refrigeration device, $t_k$= 35°C, $t_0$= -38°C, the temperature of the liquid refrigerant in front of the auxiliary expansion valve is 39°C, the temperature of the liquid refrigerant in front of the main expansion valve is 0°C, and the superheat of the steam inhaled by the low-pressure compressor is 5°C. What should be the intermediate pressure for normal operation?
A. $4.24 (\text{kgf/cm}^2)$
B. $4.10 (\text{kgf/cm}^2)$
C. $4.14 (\text{kgf/cm}^2)$
D. $3.94 (\text{kgf/cm}^2)$
E. $4.08 (\text{kgf/cm}^2)$
F. $4.04 (\text{kgf/cm}^2)$
G. $3.84 (\text{kgf/cm}^2)$
H. $4.12 (\text{kgf/cm}^2)$
I. $4.00 (\text{kgf/cm}^2)$
J. $4.06 (\text{kgf/cm}^2)$
Answer: | F. $4.04 (\text{kgf/cm}^2)$ |
|
The following are multiple choice questions (with answers).
There is a water-cooled condenser with a condensing load of 120,000 kcal/hour, and the cooling water is 250 liters/min. Let the heat transfer coefficient is K = 800 kcal/m ²· hour ·°C, when the cooling water inlet temperature is $t_{w1}$= 23°C, in order to keep the condensation temperature 32°C, test calculation of the necessary heat transfer area should be what?
A. 41.7 m^2
B. 40.5 m^2
C. 41.8 m^2
D. $41.2 m^2$
E. 41.3 m^2
F. 41.0 m^2
G. 41.4 m^2
H. 41.5 m^2
I. $42.5 m^2$
J. 40.8 m^2
Answer: | D. $41.2 m^2$ |
|
The following are multiple choice questions (with answers).
There is a freon-22 refrigeration device with an evaporation temperature of $$t_0 = -20°C$$, and the refrigerant circulation amount is $q_m = 300 \text{kg/h}$. The compressor is set to inhale dry saturated steam, and how large should the inner diameter of the barrel of the vapour-liquid separator be?
A. 0.14m
B. 0.143m
C. 0.13m
D. 0.17m
E. 0.145m
F. 0.142m
G. 0.148m
H. 0.16m
I. 0.15m
J. 0.12m
Answer: | A. 0.14m |
|
The following are multiple choice questions (with answers).
There is an ammonia compressor, the cylinder diameter is $60 \text{mm}$, the piston stroke is $50 \text{mm}$, the number of cylinders is $8$, the speed is $1500 \text{RPM/min}$, If $t_k = 35°C$, $t_0 = -15°C$, the overcooling degree of ammonia liquid in front of the expansion valve is $5°C$, and the compressor inhales dry saturated steam, how many kilowatts is the shaft power required by the compressor? At this time, the volume efficiency $\eta_v = 0.72$, the compression efficiency $\eta_s = 0.73$, and the mechanical efficiency $\eta_m = 0.9$.
A. 11.3
B. 11.5
C. 11.8
D. 12.2
E. 11.9
F. 11.4
G. 12.0
H. 11.6
I. 12.1
J. 11.7
Answer: | E. 11.9 |
|
The following are multiple choice questions (with answers).
China Business Center is a joint venture primarily engaged in property management. Currently, it has 272 office tenants, 426 apartment tenants, and 106 shopping mall tenants. Under the General Manager, the company has departments including Property Management, Marketing, Finance, Human Resources, Public Relations, and Business Development. The Property Management Department is further divided into Office Building Management, Apartment Management, Shopping Mall Management, and other supporting departments. Therefore, the organizational structure design of the entire company and within the Property Management Department respectively adopts ( ) form.
A. Customer departmentalization and functional departmentalization
B. Both customer departmentalization
C. Functional departmentalization and customer departmentalization
D. Both functional departmentalization
Answer: | D. Both functional departmentalization |
|
The following are multiple choice questions (with answers).
American management expert Peter Drucker said: "The real difficulty lies not in determining what specific goals we need, but in how to establish these goals." Therefore, the characteristics of goals can be summarized as ().
A. Hierarchy, Correlation, Verifiability, and Multiplicity
B. Hierarchy, Operability, Measurability, and Multiplicity
C. Hierarchy, Correlation, Measurability, and Multiplicity
D. Hierarchy, Operability, Verifiability, and Multiplicity
E. Hierarchy, Operability, Verifiability, and Temporality
Answer: | E. Hierarchy, Operability, Verifiability, and Temporality |
|
The following are multiple choice questions (with answers).
If you are the general manager of a company, which of the following matters requiring decision-making should be your main focus ()"
A. Adjustment of organizational structure
B. Review of company-wide policies
C. Contact with major suppliers
D. Review of employee performance metrics
E. Development of short-term operational goals
F. Development of marketing strategies
G. Development of production plans
H. Arrangement of funds
I. Development of long-term strategic goals
Answer: | I. Development of long-term strategic goals |
|
The following are multiple choice questions (with answers).
For the standard 74XX TTL series, what are the typical voltage guaranteed to register as binary 0 and bianry 1?
A. 0-0.5V, 2.5-5.0V
B. 0-0.4V, 2.4-5.0V
C. 0-0.4V, 2.6-5.0V
D. 0-0.4V, 2.5-5.0V
E. 0-0.5V, 2.3-5.0V
F. 0-0.4V, 2.2-5.0V
G. 0-0.4V, 2.3-5.0V
H. 0-0.8V, 2-5V
Answer: | B. 0-0.4V, 2.4-5.0V |
|
The following are multiple choice questions (with answers).
Calculate ΔH for the non-isothermal reaction:
4H₂(298 K) + Fe₃O₄(1,400 K) = 3Fe(1,400 K) + 4H₂O(1,000 K)
A. 298
B. 167.55
C. 178.92
D. 173.65
E. 154.43
F. 161.33
G. 295.28
H. 182.44
I. 143.21
J. 149.87
Answer: | E. 154.43 |
|
The following are multiple choice questions (with answers).
Among the following statements, which are correct:
I. A tree has no cut edge
II. If graph G has a cut edge, then it has no cycle
III. A cut edge cannot be on a cycle
IV. A tree has unique edges
V. A Hamilton graph must contain a cycle
VI. In any graph G, if minimum degree δ≥2, then G contains a cycle
A. II,IV,V,VI
B. I,III,IV,V,VI
C. IV,V,VI
D. III,V,VI
E. I,II,III,IV,V,VI
F. I,II,IV,V,VI
G. I,III,VI
H. III,IV,V
I. II,III,IV,V,VI
J. I,II,III,V
Answer: | D. III,V,VI |
|
The following are multiple choice questions (with answers).
### Problem
A unit evaluates the promotion conditions for six colleagues to a higher professional title based on the following criteria (practical performance, management level, teaching level, teaching awards, honorary certificates, research level, research awards, number of papers). Due to different circumstances for each person and limited positions available, 8 experts were asked to rank the 6 colleagues a, b, c, d, e, f. The results are shown in the table. Please use fuzzy opinion set decision-making to determine the ranking order of these 6 colleagues.
### Expert Scoring Table
| Opinion | 1 (10 pts) | 2 (8 pts) | 3 (6 pts) | 4 (4 pts) | 5 (2 pts) | 6 (1 pt) |
|---------|------------|-----------|-----------|-----------|-----------|-----------|
| 1 | b | a | d | c | f | e |
| 2 | b | e | f | a | d | c |
| 3 | e | d | f | c | a | b |
| 4 | e | d | c | f | b | a |
| 5 | d | e | c | f | b | a |
| 6 | c | d | f | a | b | e |
| 7 | f | d | a | c | b | e |
| 8 | d | c | f | a | e | b |
A. cabdef
B. becfad
C. dfceba
D. fdcbea
E. dfecba
F. dfbeca
G. defcab
H. dcefba
I. decfba
J. dcbefa
Answer: | E. dfecba |
|
The following are multiple choice questions (with answers).
The relationship between the truth values of "Xiao Wang is a student" and "Xiao Wang is not a student" is:
I. Cannot both be true, can both be false
II. Can both be true, can both be false
III. Cannot both be true, cannot both be false
IV. Truth implies falsehood
V. Falsehood implies truth
A. I,II,IV
B. II,III,V
C. III,V,IV
D. I,IV,V
E. III,IV
F. I,III,V
G. II,III,IV
H. II,IV,V
I. III,IV,V
J. I,II,V
Answer: | I. III,IV,V |
|
The following are multiple choice questions (with answers).
Media image consists of ()
I. Core media image
II. Subject media image
III. Object media image
IV. Extended media image
A. I,II
B. II,III
C. II
D. IV
E. I,IV
F. II,III,IV
G. I,III
H. I,II,III
I. III,IV
J. II,IV
Answer: | F. II,III,IV |
|
The following are multiple choice questions (with answers).
Chinese Military Legal Institutions include?
I Military Judicial Organs
II Military Procuratorate Organs
III Military Trial Organs
IV Military Prisons
V Military Security Organs
VI Military Legislative Organs
A. II,IV
B. III,V
C. VI,IV
D. I,V
E. V,VI
F. II,V
G. II,I
H. I,II,III,V,VI
I. I,VI
J. III,IV
Answer: | H. I,II,III,V,VI |
|
The following are multiple choice questions (with answers).
Estimate the gravitational potential energy released by the entire Earth due to the solidification of the inner core, given that the density increases by 2.5% during solidification of the core material, the inner core radius $r_0 = 1.217 \times 10^6 \, \text{m}$, and the pressure at the inner core boundary $P_0 = 3.29 \times 10^{11} \, \text{Pa}$.
A. $8.2 \times 10^{27} \, \text{J}$
B. $4.8 \times 10^{29} \, \text{J}$
C. $4.2 \times 10^{29} \, \text{J}$
D. $1.7 \times 10^{28} \, \text{J}$
E. $2.3 \times 10^{27} \, \text{J}$
F. $7.9 \times 10^{28} \, \text{J}$
G. $6.5 \times 10^{28} \, \text{J}$
H. $5.6 \times 10^{30} \, \text{J}$
I. $9.1 \times 10^{30} \, \text{J}$
J. $3.4 \times 10^{29} \, \text{J}$
Answer: | G. $6.5 \times 10^{28} \, \text{J}$ |
|
The following are multiple choice questions (with answers).
Say whether each of the following sentences is valid, contingent, or unsatisfiable.
a. (p ⇒ q) ∨ (q ⇒ p)
b. p ∧ (p ⇒ ¬q) ∧ q
c. (p ⇒ (q ∧ r)) ⇔ (p ⇒ q) ∧ (p ⇒ r)
d. (p ⇒ (q ⇒ r)) ⇒ ((p ∧ q) ⇒ r)
e. (p ⇒ q) ∧ (p ⇒ ¬q)
f. (¬p ∨ ¬q) ⇒ ¬(p ∧ q)
g. ((¬p ⇒ q) ⇒ (¬q ⇒ p)) ∧ (p ∨ q)
h. (¬p ∨ q) ⇒ (q ∧ (p ⇔ q))
i. ((¬r ⇒ ¬p ∧ ¬q) ∨ s) ⇔ (p ∨ q ⇒ r ∨ s)
j. (p ∧ (q ⇒ r)) ⇔ ((¬p ∨ q) ⇒ (p ∧ r))
A. valid, unsatisfiable, valid, valid, contingent, valid, contingent, contingent, valid, valid
B. valid, unsatisfiable, contingent, valid, contingent, valid, contingent, valid, valid, valid
C. valid, unsatisfiable, valid, contingent, contingent, valid, contingent, contingent, valid, valid
D. contingent, unsatisfiable, valid, valid, valid, valid, contingent, contingent, valid, valid
E. contingent, unsatisfiable, valid, valid, contingent, valid, contingent, valid, contingent, valid
F. valid, unsatisfiable, valid, valid, contingent, valid, valid, contingent, contingent, valid
G. valid, unsatisfiable, valid, valid, contingent, contingent, contingent, contingent, valid, valid
H. valid, contingent, valid, valid, contingent, valid, unsatisfiable, contingent, valid, valid
I. valid, unsatisfiable, contingent, valid, contingent, valid, contingent, contingent, valid, contingent
J. valid, contingent, valid, valid, unsatisfiable, valid, contingent, contingent, valid, valid
Answer: | A. valid, unsatisfiable, valid, valid, contingent, valid, contingent, contingent, valid, valid |
|
The following are multiple choice questions (with answers).
In each of the following cases, determine whether the given individual sentence is consistent with the given set of sentences.
a. {p ∨ q, p ∨ ¬q, ¬p ∨ q} and (¬p ∨ ¬q)
b. {p ⇒ r, q ⇒ r, p ∨ q} and r
c. {p ⇒ r, q ⇒ r, p ∨ q} and ¬r
d. {p ⇒ q ∨ r, q ⇒ r} and p ∧ q
e. {p ⇒ q ∨ r, q ⇒ r} and q ∧ r
A. consistent, inconsistent, inconsistent, consistent, consistent
B. inconsistent, consistent, consistent, inconsistent, consistent
C. consistent, consistent, inconsistent, inconsistent, consistent
D. inconsistent, inconsistent, consistent, consistent, consistent
E. consistent, inconsistent, consistent, consistent, inconsistent
F. inconsistent, consistent, inconsistent, consistent, consistent
G. inconsistent, inconsistent, inconsistent, consistent, consistent
H. inconsistent, consistent, inconsistent, inconsistent, consistent
I. inconsistent, consistent, consistent, consistent, inconsistent
J. consistent, consistent, consistent, inconsistent, inconsistent
Answer: | F. inconsistent, consistent, inconsistent, consistent, consistent |
|
The following are multiple choice questions (with answers).
Let Γ and Δ be sets of sentences in Relational Logic. Let φ and ψ be closed sentences in Relational Logic. State whether each of the following statements is true or false.
a. If Δ ⊨ ∀x.(p(x) ∨ q(x)) and Δ ⊨ ∃x.¬p(x), then Δ ⊨ ∃x.q(x)
b. If Δ ⊨ ∀x.(p(x) ⇒ q(x)) and Δ ⊨ ∃x.p(x), then Δ ⊨ ∃x.(p(x) ∧ q(x)).
c. If Δ ⊨ ∀x.(p(x) ⇒ q(x)) and Δ ⊨ ∀x.(q(x) ⇒ r(x)), then Δ ⊨ ∀x.(p(x) ⇒ r(x)).
d. If Δ ⊭ ∃x.p(x), then Δ ⊨ ∀x.¬p(x).
e. If Δ ⊨ ∀x.(p(x) ⇒ q(x)) and Δ ⊨ ∃x.¬q(x), then Δ ⊨ ∃x.¬p(x).
A. true, false, true, true, true
B. true, false, true, false, false
C. true, true, true, true, false
D. false, true, true, false, false
E. true, true, true, false, true
F. false, true, false, true, true
G. false, false, true, false, true
H. false, true, true, true, true
I. true, false, false, false, true
J. true, true, false, true, true
Answer: | E. true, true, true, false, true |
|
The following are multiple choice questions (with answers).
Let $G$ be an undirected simple graph of order $n \left( \, n \geq2 \, \right)$, and let $\overline{G}$ be its complement graph. Given that $\Delta\left( G \right) = k_{1}, \, \delta\left( G \right) = k_{2}$, find $\Delta(\overline{G})$ and $\delta(\overline{G})$.
A. $n - (1 + k_2), \, n - (1 + k_1)$
B. $n - k_2 - 1, \, n - k_1 - 1$
C. $k_2 - (n - 1), \, k_1 - (n - 1)$
D. $(n + 1) - k_2, \, (n + 1) - k_1$
E. $(n - 1) - k_2, \, (n - 1) - k_1$
F. $(k_1 + 1) - n, \, (k_2 + 1) - n$
G. $n - (k_2 + 1), \, n - (k_1 + 1)$
H. $n - (k_2 - 1), \, n - (k_1 - 1)$
I. $k_1 - (n + 1), \, k_2 - (n + 1)$
J. $(n - k_2) - 1, \, (n - k_1) - 1$
Answer: | A. $n - (1 + k_2), \, n - (1 + k_1)$ |
|
The following are multiple choice questions (with answers).
Six beads are evenly spaced on a circular ring. Each bead can be one of three colors: red, blue, or yellow. How many different arrangement patterns are possible?
A. 144
B. 81
C. 105
D. 108
E. 78
F. 120
G. 72
H. 130
I. 92
J. 96
Answer: | I. 92 |
|
The following are multiple choice questions (with answers).
Which of the following newspapers was the first official organ newspaper of the Revive China Society and who was its first - time director - general? ( )
A. "The Chinese Progress", Liang Qichao
B. "Su Newspaper", Zhang Shizhao
C. "Freedom Post", Sun Wei - shan
D. "The People's Newspaper", Zhang Taiyan
E. "Reform Gazette", Chen Dun - xiu
F. "National Herald", Wang Ming - dao
G. "Unity Press", Zhao Wei - ming
H. "Eastern Voice", Yang Qi - yuan
I. "China Daily", Chan Siu - pak
J. "Beijing Times", Liu Zhi - ping
Answer: | I. "China Daily", Chan Siu - pak |
|
The following are multiple choice questions (with answers).
If group G has 65 elements and it has two subgroups namely K and L with order 14 and 30. What can be order of K intersection L?
A. 7
B. 2
C. 10
D. 3
E. 6
F. 4
G. 42
H. 1
I. 35
J. 5
Answer: | J. 5 |
|
The following are multiple choice questions (with answers).
Applying for Seasonal Employment occurs when a person requests to be considered for a job that is dependent on a particular season or time of year. Which situation below is the best example of Applying for Seasonal Employment?
A. Jennifer submits her resume at the local garden center to be considered for their indoor plant specialist role starting next spring.
B. The ski instructors at Top of the Peak Ski School work from December through March.
C. Patricia inquires with the lakeside marina about becoming a boat tour guide for their upcoming tourist season opening.
D. Michael contacts the shopping mall customer service desk about working additional hours during the holiday shopping rush.
E. Lucinda makes an appointment with the beach resort restaurant manager to interview for the summer waitressing position that was advertised in the newspaper.
F. Doug's ice cream shop stays open until 11 p.m. during the summer months.
G. Matthew prefers jobs that allow him to work outdoors.
H. Rebecca schedules a meeting with the waterpark operations director to discuss teaching swimming lessons at their outdoor facility.
I. Thomas drops off his application at the downtown coffee shop hoping to join their team as a morning shift barista this fall.
J. Amanda sends her credentials to the harvest festival planning committee seeking to coordinate vendor activities this autumn.
Answer: | E. Lucinda makes an appointment with the beach resort restaurant manager to interview for the summer waitressing position that was advertised in the newspaper. |
|
The following are multiple choice questions (with answers).
Which of the following statements about journalism are correct?1.The research object of media management is media management phenomena, which only includes strategic management phenomena2.Alan B. Albarran, in "Management of Media Organizations: Effective Leadership in Media," proposed the four major functions of media management.3.The concept of overall truth requires news reporting to go beyond the surface characteristics of facts and consider the internal connections and broader context.4.The third media refers to news dissemination tools that transmit text, audio, and images through the internet.
A. 1,3
B. 1,3,4
C. 1,2,4
D. 2,3
E. 1,2,3
F. 3,4
G. 2,4
H. 2,3,4
I. 3
J. 1,4
Answer: | I. 3 |
|
The following are multiple choice questions (with answers).
Which of the following statements about dance are incorrect?
1. The dance "Swan Song" belongs to contemporary ballet
2. The story of Swan Lake is based on a Danish fairy tale
3. The choreography method used in "Swan Lake Act II" is symphonic choreography
4. Classical ballet positions do not require symmetry
A. 2,3,4
B. 2,4
C. 1,2
D. 2,3
E. 1,3,4
F. 1,4
G. 1,3
H. 3,4
I. 1,2,3,4
J. 1,2,4
Answer: | I. 1,2,3,4 |
|
The following are multiple choice questions (with answers).
Calculate the composition of green light signal mixture $\mathrm{C_{2} C l_{6} \,+\, B a ( N O_{3} )_{2} \,+\, M g}$ + shellac, where the content of $\mathrm{C}_{2} \mathrm{C l}_{6}$ is 0.15, and the content of shellac is 0.05 (${\bf C} \longrightarrow{\bf C} 0$)
A. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.599}} \\ {{\mathrm{Mg}}} & {{0.201}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.14}} \\ {{\mathrm{Mg \, BE}}} & {{0.06}} \\ \end{matrix} \right.
B. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.579}} \\ {{\mathrm{Mg}}} & {{0.221}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
C. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.589}} \\ {{\mathrm{Mg}}} & {{0.211}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
D. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.609}} \\ {{\mathrm{Mg}}} & {{0.191}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
E. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.449}} \\ {{\mathrm{Mg}}} & {{0.351}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.17}} \\ {{\mathrm{Mg \, BE}}} & {{0.03}} \\ \end{matrix} \right.
F. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.599}} \\ {{\mathrm{Mg}}} & {{0.201}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
G. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.619}} \\ {{\mathrm{Mg}}} & {{0.181}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
H. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.569}} \\ {{\mathrm{Mg}}} & {{0.231}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right.
I. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.589}} \\ {{\mathrm{Mg}}} & {{0.211}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.10}} \\ {{\mathrm{Mg \, BE}}} & {{0.10}} \\ \end{matrix} \right.
J. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.599}} \\ {{\mathrm{Mg}}} & {{0.201}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.13}} \\ {{\mathrm{Mg \, BE}}} & {{0.07}} \\ \end{matrix} \right.
Answer: | F. $$ \left\{\begin{matrix} {{\mathrm{Ba(NO_{3})_{2}}}} & {{0.599}} \\ {{\mathrm{Mg}}} & {{0.201}} \\ {{\mathrm{C_{2}Cl_{6}}}} & {{0.15}} \\ {{\mathrm{Mg \, BE}}} & {{0.05}} \\ \end{matrix} \right. |
|
The following are multiple choice questions (with answers).
Consider a super-Gaussian pulse with the following power distribution:
$$
P ( t )=P_{0} \operatorname{e x p} [-( t / T_{0} )^{2 m} ]
$$
where parameter $m$ controls the pulse shape. Calculate the ratio $T_{r} / T_{\mathrm{F W H M}}$, where $T_{\mathrm{F W H M}}$ is the full width at half maximum, and indicate what this ratio equals for a Gaussian pulse $( \, m=1 \, )$?
A. $0.923$
B. $0.577$
C. $0.693$
D. $0.716$
E. $0.943$
F. $0.628$
G. $0.842$
H. $0.785$
I. $0.651$
J. $0.814$
Answer: | D. $0.716$ |
|
The following are multiple choice questions (with answers).
If there are currently three birds here, and at least one of them is male, what is the probability that among these four birds (after adding one more male bird), at least two birds are female?
A. 6/11
B. 1/2
C. 5/11
D. 3/5
Answer: | A. 6/11 |
|
The following are multiple choice questions (with answers).
If more than half of the vertices of an n-dimensional hypercube are colored blue, what is the minimum number of other blue vertices that at least one blue vertex must be connected to?
A. 1
B. √n
C. n+1
D. n/2
E. 0
F. log₂(n)
G. n
H. n!
I. 2ⁿ
J. n-1
Answer: | B. √n |
|
The following are multiple choice questions (with answers).
Consider the following statements about complete graphs. How many of these statements are TRUE?
1. Kₙ is the graph with n vertices that has the fewest edges.
2. Kₙ is a simple graph.
3. If n is prime, then Kₙ is a bipartite graph.
4. Kₙ is n-regular.
5. Kₙ has n(n-1)/2 edges.
6. Kₙ is the graph with n vertices having the maximum number of edges among disconnected graphs.
7. The number of edges in Kₙ is given by the combination formula C(n, 2).
8. Kₙ is the graph with n vertices that has the maximum number of edges among all graphs (including non-simple graphs).
9. The complete graph K₁₀₁ contains a 1-factor.
10. The complete graph K₁₀₂ contains a 2-factor.
A. 4
B. 8
C. 6
D. 7
E. 9
F. 10
G. 5
H. 0
I. 2
J. 1
Answer: | G. 5 |
|
The following are multiple choice questions (with answers).
The media divides the newspaper market into the 'reader market, advertising market, news resource market, and investor market'. Who proposed this?
A. Shram
B. Syndicate
C. Benjamin Day
D. McManus
Answer: | D. McManus |
|
The following are multiple choice questions (with answers).
According to Clark's three-part classification of economics, economics should be divided into which of the following?
A. Production economics, distribution economics, exchange economics
B. Production economics, distribution economics, consumption economics
C. Pure economics, static economics, dynamic economics
D. General economics, static economics, dynamic economics
Answer: | D. General economics, static economics, dynamic economics |
|
The following are multiple choice questions (with answers).
Which of the following statements about groups is the most difficult to verify directly without resorting to advanced theorems?
A. If a set has at least one element, then it is a group.
B. The intersection of sets has both identity and inverse elements.
C. If G is a group and H and K are subgroups of G such that H is a subgroup of K, and K is a subgroup of H, then H and K are the same subgroup.
D. There exists an empty group.
E. The identity element is unique in a group.
F. A group with 13 elements has subgroups.
G. If x is an element of a group G, and e is the identity element of G, then x * e = x.
H. The universal set R on which a group is defined is closed under the group operation.
I. The set of all subsets of a set with 21 elements forms a group under the operation of set intersection.
J. Equivalence relations define a group under the operation of composition.
Answer: | H. The universal set R on which a group is defined is closed under the group operation. |
|
The following are multiple choice questions (with answers).
During a debate, crucial information was lost. Among the participants-Zhang, Wang, Li, and Zhao-only one person is telling the truth. They made the following statements:
Zhang: "My statement is not true."
Wang: "My statement is true."
Li: "My statement is true."
Zhao: "My statement has no truth value."
After some discussion, it is determined that exactly one person is telling the truth, while the others are lying. Based on these conditions, which of the following lines of reasoning correctly identifies the truth-teller?
A. Assume Wang is telling the truth. Then Li is also telling the truth, which contradicts the condition that only one person is telling the truth. Therefore, Wang is lying.
B. Since only one person is truthful, at least three must be lying. Therefore, consider only those who claim to be truthful. Both Wang and Li make such claims. As only one can be truthful, both Wang and Li must be lying, leaving Zhao as the only possible truth-teller.
C. Assume Li is lying. Then Wang must also be lying. If Wang is lying, then Zhang could be telling the truth. No contradiction arises, so Li is lying.
D. If Zhang is telling the truth, his statement creates a paradox. If Wang is truthful, then Li is also truthful. Hence, neither Zhang nor Wang is telling the truth, meaning Li or Zhao might be truthful. Since Zhao's statement is paradoxical, Li must be truthful.
E. If we assume Wang is truthful, then Li's statement is also true. However, this is impossible; thus, Wang and Li are lying, meaning Zhao is truthful.
F. Assume Zhang is telling the truth. Then his statement "My statement is not true" is true, which is a contradiction. Therefore, Zhang is lying.
G. If Zhang is truthful, his statement is paradoxical. If Wang is truthful, Li is truthful, creating a contradiction. If Li is truthful, Wang is also truthful, creating a contradiction. Therefore, by elimination, Zhao must be truthful.
H. Assume Li is telling the truth. Since only one person can be truthful, both Wang and Zhao must be lying. This doesn't lead to any contradiction, so Li is telling the truth.
I. Assume Zhao is telling the truth. Then his statement "My statement has no truth value" is true, which is a contradiction. Therefore, Zhao is lying.
J. Since only one person can be telling the truth, assume it's Zhang. This directly contradicts his statement, so Zhang must be lying.
Answer: | A. Assume Wang is telling the truth. Then Li is also telling the truth, which contradicts the condition that only one person is telling the truth. Therefore, Wang is lying. |
|
The following are multiple choice questions (with answers).
Cotton and linen both readily catch fire. A batch of towels is composed of both cotton and linen, and is known to have caught fire. If it is known that the towels were ignited by a lit cigarette, which of the following arguments utilizes the most appropriate form of reasoning?
A. Eliminating all other unlikely or improbable causes, such as spontaneous combustion or electrical faults, it is highly probable, given the presence of flammable materials (cotton and linen towels) and an ignition source (lit cigarette), that the cigarette caused the fire.
B. There was a lit cigarette near flammable towels, and there was a fire involving those same towels. The most likely explanation is that the cigarette caused the towels to ignite, and consequently, the fire. Therefore, the cigarette was the cause of the fire.
C. Most fires involving fabric materials like towels start from an open flame, like a cigarette. Since the towels are made of cotton and linen, and a lit cigarette was found, the fire most likely originated within the cotton and linen mixture due to the presence of the open flame.
D. Over 40% of household fires are started by cigarettes, and a lit cigarette was confirmed to be present. Given that the towels are composed of 40% cotton and 40% linen, and it's highly likely a cigarette started the fire, it can be concluded that the fire started in either the cotton or linen portions of the towels.
E. Towels are made to absorb water, yet cotton and linen are flammable materials. It is therefore inherently risky to have a lit cigarette near cotton/linen towels, so it is almost certain that the lit cigarette was the cause of the fire.
F. While not ruling out other less probable sources, the simultaneous presence of a lit cigarette and a pile of towels made of cotton and linen suggests a likely connection between the two. Since most fires in the home are due to easily preventable accidents, it is probable that the cigarette ignited the towels.
G. Fires require three elements: heat, fuel, and oxygen. The towels, being made of flammable cotton and linen, provided the fuel. The air supplied the oxygen. The lit cigarette supplied the heat. Therefore, the cigarette caused the fire.
H. Statistically, cigarettes are the leading cause of house fires. Therefore, combined with the known flammable materials present in the towels, the probability that the cigarette was the cause of the fire is very high.
I. It is common knowledge that cigarettes can start fires. Therefore, since a lit cigarette was near the towels, and those towels are known to be flammable, the fire must have started there due to the presence of the lit cigarette.
J. Because a lit cigarette was the only ignition source present near the towels made of combustible cotton and linen, it can be concluded that the cigarette was the cause of the fire.
Answer: | J. Because a lit cigarette was the only ignition source present near the towels made of combustible cotton and linen, it can be concluded that the cigarette was the cause of the fire. |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.