problem stringlengths 14 4.09k | solution stringlengths 1 802k | task_type stringclasses 3
values | problem_tokens int64 5 895 |
|---|---|---|---|
The following is a multiple choice question (with answers).
===Question
The central part of the __________ exhibits red-stained, structureless necrotic material. It is surrounded by an infiltration of lymphocytes, plasma cells, monocytes, and eosinophilic granulocytes.
===Choices
pancreatic tissue division
myocarditis... | myocarditis lesion | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
In intermittent training, which type of athletes is it commonly used for?
===Choices
Weightlifter
Swimmer
Sprinter
Wrestler
Marathoner
Basketball player
Boxer
Cyclist
Golfer
Archer | Sprinter | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
Assume a neutron star is a highly degenerate, non-relativistic neutron gas with a spherically symmetric equilibrium structure. They are held together by the gravitational attraction of a massive object located at its center, with mass $M$ and radiu... | $$
\left[ {\frac{2 M G} {5 a}} \cdot{\frac{1} {r}} \right]^{3 / 2}
$$ | general_qa | 472 |
The following is a multiple choice question (with answers).
===Question
Which of the following statements are correct(Choose the option that includes all the correct statements): 1. The initial heat release rate of a gasoline engine is higher than that of a diesel engine. 2. When the engine load increases while other c... | 1,4,5 | general_qa | 172 |
The following is a multiple choice question (with answers).
===Question
In which year did the Portuguese explorer Gaspar Corte-Real reach Canada and find the town of Portugal Cove-St. Philip's?
===Choices
1498
1502
1501
1506
1507
1499
1505
1504
1500
1503 | 1500 | general_qa | 93 |
The following is a multiple choice question (with answers).
===Question
The first volume of 'Capital' (German edition) was published in Hamburg in September 1867. Its influence has remained strong for 150 years, and it still provides significant guidance for our analysis and understanding of current economic issues. Ma... | Theory of the Duality of Labor | general_qa | 169 |
The following is a multiple choice question (with answers).
===Question
Convert 99.103 Megabytes to Gigabits.
===Choices
0.71
0.73
0.75
0.78
-57.35
0.89
1.42
0.77
6.13
0.79 | 0.79 | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
Deterioration reactions often include ______ and the release of carbon dioxide.
===Choices
propane
phosphine
ammonia
oxygen
methane
water
nitrogen
ethane
hydrogen
sulfur | water | general_qa | 63 |
The following is a multiple choice question (with answers).
===Question
In Season 2 of the TV show "Physical," who wrote Episode 6, "Don't You Have Enough"?
===Choices
Jackie Li
Jackie Lie
Jackie Lee
Jackie Lii
Jackie Le
Jackie Liei
Jackie Lei | Jackie Li | general_qa | 70 |
The following is a multiple choice question (with answers).
===Question
We now define an algorithm: The definition of a(n) is numbers whose prime divisors are all less than or equal to 11 (also known as 11-smooth numbers). Given the input x_list (a series of values): [58, 59, 60, 61, 62, 63, 64, 65, 66, 67], determine ... | [110, 112, 120, 121, 125, 126, 128, 132, 135, 140] | general_qa | 615 |
The following is a multiple choice question (with answers).
===Question
Who did Joe Gqabi become co-chairman of in the clandestine ANC organization in Johannesburg, known as the Main Machinery?
===Choices
Martin Ramokgadi
Chris Chameleon
Oliver Tambo
Nelson Mandela
Chris Hani | Martin Ramokgadi | general_qa | 65 |
The following is a multiple choice question (with answers).
===Question
What is the indicator for evaluating a material's resistance to water damage?
===Choices
Moisture persistence index
Saturation tolerance factor
Freeze-thaw resistance grade
Erosion resistance standard
Permeability coefficient
Hydration absorption ... | Softening coefficient | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
Where are the most striated pores in the cell walls of axial tubes?
===Choices
Latewood tubule radial wall
Radial wall of earlywood fibres
Latewood tracheid wall
Earlywood tubule chordal wall
The chordal wall of latewood tubules
Chordal wall in ea... | Earlywood tubule radial wall | general_qa | 112 |
The following is a multiple choice question (with answers).
===Question
A clean solid surface exposed to an ideal gas with a molecular mass of $m$, molecular number density of $n$, and temperature $T$ absorbs gas molecules at a certain rate [measured in molecules $\left. / (\mathbf{s} \cdot \mathbf{m}^{2}) \right]$. If... | $$
n \sqrt{\frac{k T} {2 \pi m}} \ \cdot\ \exp\Bigl(-\frac{m v_{\mathrm{r}}^{2}} {2 k T} \Bigr) \
$$ | general_qa | 678 |
The following is a multiple choice question (with answers).
===Question
The average heat absorption temperature of piston internal combustion engines is quite high, so why is the cycle thermal efficiency not very high?
===Choices
Because of the cylinder material limitation, the compression ratio cannot Very high, so t... | Because of the cylinder material limitation, the compression ratio cannot Very high, so the cycle thermal efficiency is limited. | general_qa | 196 |
The following is a multiple choice question (with answers).
===Question
Which of the following descriptions most accurately reflects the trend in elemental content changes from ultramafic to felsic rocks in igneous rocks? Consider the following statements:
I. The content of Fe, Mg, Ni, Co, Cr, and Pr gradually decrease... | III | general_qa | 444 |
The following is a multiple choice question (with answers).
===Question
What is the lift of an aircraft with a wing effective lift area of 400 square centimeters, a lift coefficient of 1.5, and a speed of 100 meters per second?
===Choices
720 Newtons
600 Newtons
690 Newtons
680 Newtons
610 Newtons
750 Newtons
800 Newt... | 600 Newtons | general_qa | 119 |
The following is a multiple choice question (with answers).
===Question
Let $T_1$ be surface tension between solid and air, $T_2$ the surfaced tension between solid and liquid and T the surface tension between liquid and air. Then in equilibrium, for a drop of liquid on clean glass plate the relation is $(\theta$ is an... | $$cos\theta=\dfrac{T_1-T_2}{T}$$ | general_qa | 266 |
The following is a multiple choice question (with answers).
===Question
According to the 'China Mineral Resources Report 2021', how many types of minerals have been discovered in China by the end of 2020?
===Choices
171
177
174
176
179
173
178
175
172
170 | 173 | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
If you are to pack fermented fishery products, what do you think is the most ideal packaging material?
===Choices
plastic bottles
A wrapper with a paper band
A container with a wooden top
A box with a metal lid
A bottle with a plastic cap
A pouch ... | A bottle with a plastic cap | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
In a symmetrical concave cavity with length $\mathbf{L}$ and mirror curvature radius $R=2.5L$, given the wavelength of light as $\lambda$, determine the radius of the fundamental mode spot on the mirror surface.
Answer is___.
===Choices
$${\frac{2... | $${\frac{1} {2}} {\sqrt{\frac{5 \lambda L} {\pi}}}
$$ | general_qa | 331 |
The following is a multiple choice question (with answers).
===Question
Fermi Gas. Consider an ideal Fermi gas, with atomic mass $m=5 \times 10^{-26} \text{g}$, nuclear spin $I=\frac{1}{2}$, and nuclear magnetic moment $\mu=1 \times 10^{-25} \text{erg/G s}$. When $T=0 \text{K}$, what is the maximum density at which the... | $\approx2 \times 10^{17}$ atoms/$cm^{3}$ | general_qa | 330 |
The following is a multiple choice question (with answers).
===Question
Calculate
$$
\int_{| z |=1} \frac{1} {\mathrm{e}^{\frac{1} {z}}-1} \mathrm{d} z.
$$
===Choices
$$
\frac{\pi i} {3}
$$
$$
\frac{1} {2}
$$
$$
-2\pi i
$$
$$
\frac{\pi i} {4}
$$
$$
\frac{\pi} {6}
$$
$$
\frac{\pi i} {6}
$$
$$
-\frac{\pi i} {2}
$$
$$
\p... | $$
\frac{\pi i} {6}
$$ | general_qa | 173 |
The following is a multiple choice question (with answers).
===Question
The Mayor established a citizen's advisory group to provide recommendations to the Town Council on the siting of new religious institutions within the rural community that includes an agricultural reserve area. The planning staff has been asked to ... | only III | general_qa | 253 |
The following is a multiple choice question (with answers).
===Question
A quantity of $25 g$ sample of $ baO_2 $ is heated to 954 K in clased and rigid evacuated vessel of $8.21 L$ capacity . what percentage of peroxide is converted into oxide?$ 2BaO_2 (s) \leftrightharpoons 2BaO(s) +O_2(g) ; K_P = 0.5 atm $
===Choice... | $$50 \%$$ | general_qa | 158 |
The following is a multiple choice question (with answers).
===Question
Under a total pressure of 101.3 kPa and a temperature of 20°C, the solubility of ammonia in water is $2.5g(NH_3)/100g(H_2O)$. If the vapor-liquid equilibrium of ammonia solution follows Henry's Law with an equilibrium constant of 0.76, calculate th... | y=0.0196,Y=0.0200 | general_qa | 279 |
The following is a multiple choice question (with answers).
===Question
What is the cell potential of lead storage battery at
$pH=5 \quad and \quad 0.1 M \quad SO_4^{2-}at \quad 25^oC$?
Given :$E_{cell}^o=1.97 V, \cfrac {2.303RT} F=0.06$
===Choices
$$2.20\quad V$$
$$2.25\quad V$$
$$2.00\quad V$$
$$2.63\quad V$$
$$2.1... | $$2.15\quad V$$ | general_qa | 195 |
The following is a multiple choice question (with answers).
===Question
When mapping residential areas, dense neighborhoods are primarily characterized by (), while sparse neighborhoods are primarily characterized by ().
===Choices
integrate, segregate
compact, disperse
cluster, isolate
homogenize, diversify
concentra... | merge, select | general_qa | 88 |
The following is a multiple choice question (with answers).
===Question
In the isometric crystal system, what is the relationship between the crystal plane (100) and the crystal plane (011)?
===Choices
Convergent towards the center
Uncertain
Parallel along one edge
Parallel
Perpendicular
Mirroring each other along a c... | Perpendicular | general_qa | 104 |
The following is a multiple choice question (with answers).
===Question
The drinking water source protection project mainly includes plant hedges, ecological ditches, pre-settling tanks, and what?
===Choices
Groundwater recharge basin
Water testing facilities
Sedimentation tank
Water filtration network
Bioswale system... | Vegetation buffer zone | general_qa | 91 |
The following is a multiple choice question (with answers).
===Question
Which of the following methods can selectively kill weeds based on soil displacement while protecting crops?
===Choices
Biological control using natural predators
Intercropping with resistant varieties
Mulching during early plant development
Soil ... | Soil treatment during the growth period of deep-rooted crops | general_qa | 107 |
The following is a multiple choice question (with answers).
===Question
What are the two important processes associated with alternation of generations and characteristic of them in the plant life cycle?
===Choices
Germination, mutation
Meiosis, Fertilization
Pollination, germination
Amitosis, mitosis
Spore formation,... | Meiosis, Fertilization | general_qa | 99 |
The following is a multiple choice question (with answers).
===Question
There is a mixing tank initially containing 100 kg of an aqueous solution of $Na_{\mathrm{2}}$$SO_{\mathrm{4}}$ with a concentration (mass fraction) of 50%. Now, a 15% mass fraction $\mathrm{Na}_{2}\mathrm{SO}_{4}$ solution is added to the tank at ... | $$
4. 4 2 \%
$$ | general_qa | 303 |
The following is a multiple choice question (with answers).
===Question
$SnO_{2}(s)$+$2H_{2}(g)$$\rightleftharpoons $ $2H_{2}O(steam)+Sn(s)$ For the above reaction find $K_{p}$ if at $900\ K$, the equilibrium mixture contains $45\%$ $H_{2}$ by volume.
===Choices
$$K_{p}=6.5$$
$$K_{p}=7.75$$
$$K_{p}=2.5$$
$$K_{p}=5.5$$... | $$K_{p}=2.25$$ | general_qa | 193 |
The following is a multiple choice question (with answers).
===Question
What is the relationship between the t-test and F-test results in multiple linear regression analysis?
===Choices
The F-test shows significance while t-tests for each regression remain non-significant.
If only the F-test demonstrates significance,... | The t-tests for all regression coefficients show significance, then the F-test also indicates significance. | general_qa | 209 |
The following is a multiple choice question (with answers).
===Question
According to FDA approval, which pregnancy risk category is digoxin classified under?
===Choices
Category A
Category B
Category C
Category X
Category F
Category E
Category D | Category B | general_qa | 53 |
The following is a multiple choice question (with answers).
===Question
Which major key does the ♯F-♯A-♯C triad belong to as a major triad?
===Choices
♯F Major
D Major
♯C Major
None of the above | ♯F Major | general_qa | 56 |
The following is a multiple choice question (with answers).
===Question
1913K, when balanced with pure FeO slag, the oxygen content in liquid iron is 0.268%. What is the activity of FeO in the liquid iron at the same temperature when the oxygen content is 0.176% in equilibrium with a slag?
===Choices
$0.7432$
$0.6567$... | $0.6567$ | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Under the Froude similarity criterion and the Reynolds similarity criterion, the velocity scale ratio $\lambda_{v}$ and the time scale ratio $\lambda_{\iota}$ are respectively _.
===Choices
Forchheimer: $\lambda_{v}=\lambda_{l}^{0.5} \quad\lambda_... | Forchheimer: $\lambda_{v}=\lambda_{l}^{1 / 2} \quad\lambda_{l}=\lambda_{l}^{1 / 2}$ Reynolds: $\lambda_{v}=\lambda_{l}^{-1} \quad\lambda_{l}=\lambda_{l}^{2}$ | general_qa | 736 |
The following is a multiple choice question (with answers).
===Question
In the mature stage of economic development, the focus of fiscal expenditure is ( ).
===Choices
external debt payments and defense expenditure
agricultural advances and farm subsidies
infrastructure investment
tourism development and religious gra... | human resources expenditure and transfer expenditure | general_qa | 92 |
The following is a multiple choice question (with answers).
===Question
How many ways can Elena place $1$ s inside the nine boxes of a $3 \times 3$ square such that each row and column of the $3 \times 3$ square contains at least one $1$ ? (Assume that each box either has a $1$ placed by Elena or nothing inside it; rot... | 265 | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Two long, fixed, parallel, thick rails are lying in a region having uniform magnetic field, perpendicular to the plane of the rails. Two identical sliders of mass m and resistance R each (initially at rest) can slide over the rails. If one of the s... | $$v_0$$ | general_qa | 200 |
The following is a multiple choice question (with answers).
===Question
A journalist, aiming to understand the public's satisfaction with the government's performance in managing smog, conducted interviews with 10 residents by intercepting them on the street. What are the validity issues with this method of observation... | External Validity | general_qa | 104 |
The following is a multiple choice question (with answers).
===Question
A uniformly charged sphere has a radius of α and a charge density of $\rho$, where the dielectric constant inside and outside the sphere is $\varepsilon_{0}$. Potential distribution inside and outside the sphere is (). (The potential reference poin... | $$\frac{\rho a^2}{2 \varepsilon_0}-\frac{\rho R^2}{6 \varepsilon_0}$$, when $$R \leqslant a$$
$$\frac{\rho a^{3}} {3 \varepsilon_{0} R}$$, when $$R>a$$ | general_qa | 810 |
The following is a multiple choice question (with answers).
===Question
What is the approximate thermohygrometric ratio of the isothermal humidification process of moist air?
===Choices
2500
1500
0
3500
+∞
7500
2000
9000
5000
10000 | 2500 | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
The subH atom can occupy the interstitial positions in $\alpha-\mathrm{Fe}$. If there is one hydrogen atom for every 200 iron atoms, what are the theoretical and actual packing efficiencies of α-Fe? (Given that for α-Fe, $a = 0.286 \, \mathrm{nm}$,... | 0.6844,0.6845 | general_qa | 275 |
The following is a multiple choice question (with answers).
===Question
Consider the mapping from the upper half-plane \( \mathbb{H} = \{ z \in \mathbb{C} \mid \mathrm{Im}(z) > 0 \} \) to the unit disk \( \mathbb{D} = \{ w \in \mathbb{C} \mid |w| < 1 \} \) given by
\[
\varphi(z) = \frac{z - i}{z + i}.
\]
Using this con... | \( \mathrm{d}\ell_{\mathbb{H}} = \frac{1}{\mathrm{Im}(z)} |dz| \) | general_qa | 491 |
The following is a multiple choice question (with answers).
===Question
A silicon wafer with a donor concentration of $2 \times 10^{16} \, \text{cm}^{-3}$ is gold-doped to saturation concentration at 920°C. It is then subjected to oxidation and other treatments, resulting in a surface recombination center of $10^{10} \... | $9. 6 6 \times1 0^{1 1} [ 1 / ( \mathrm{c m}^{2} \cdot\mathrm{s} ) ]$ | general_qa | 561 |
The following is a multiple choice question (with answers).
===Question
After the Tang Dynasty, the Song Dynasty writer who further criticized Li Bai was ( )
===Choices
Fan Zhongyan
Mei Yaochen
Su Zhe
Huang Tingjian
Ouyang Xiu
Su Shi
Han Qi
Wang Anshi
Liu Zongyuan
Yan Shu | Su Zhe | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
When the parallel plate electrodes are in a vacuum, the capacitance is $0.1 \mu\mathrm{F}$. Now, a solid dielectric with a relative permittivity of 3.18 is inserted. After applying an AC voltage of 50 Hz and 5 kV, the dielectric loss is 25 W. What ... | $$0.1$$ | general_qa | 164 |
The following is a multiple choice question (with answers).
===Question
What medicine can dispel wind and cold, promote qi and relieve fullness?
===Choices
Peppermint
Chamomile
Basil
Turmeric
Lavender
Ginger
Perilla
Rosemary
Cinnamon
Garlic | Perilla | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
Why does the crowding out effect suggest that the overall demand level will remain unchanged?
===Choices
Increasing government bonds will notably alter the implications of augmented government expenditure
Lowering tax rates can slightly adjust the... | An expansionary fiscal policy will drive up interest rates, leading to an increase in money supply | general_qa | 186 |
The following is a multiple choice question (with answers).
===Question
The $\mathrm{p} K_{a}^{\prime}$ values for aquatic mammals $HHbO_{2}$ and $HHb$ are 6.62 and 8.18, respectively. Calculate the number of moles of $\mathrm{H}^{+}$ that hemoglobin binds when releasing one mole of oxygen at $\mathrm{pH} 7.4$?
===Cho... | $$
0. 7 1 6 \mathrm{H}^{+} / \mathrm{O}_{\mathrm{2}}
$$ | general_qa | 409 |
The following is a multiple choice question (with answers).
===Question
The time required for a volume of gas, X, to effuse through a small hole was 112.2 sec. The time required for the same volume of oxygen was 84.7 sec. Calculate the molecular weight of gas X.
===Choices
44.8amu
75.5amu
64amu
84.7amu
16amu
100.4amu
... | 56.2amu | general_qa | 124 |
The following is a multiple choice question (with answers).
===Question
We now define an algorithm: The definition of a(n) is centered 9-gonal (also known as nonagonal or enneagonal) numbers. These are a specific type of figurate numbers where each term represents a centered 9-sided polygon. Given the input x_list (a s... | [5995, 6328, 6670, 7021, 7381, 7750, 8128, 8515, 8911, 9316] | general_qa | 727 |
The following is a multiple choice question (with answers).
===Question
When nitrite poisoning occurs, apply $( \quad)$ for detoxification.
===Choices
Meilan
Olive oil extract
$EDTA-Na_2Ca$
Sodium peroxide
Aspirin
Atropine
Thiol Antidote
Antibiotics
Vitamin B12
Iron supplements | Meilan | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
Let $G$ be a simple graph, where $A$ and $M$ are the adjacency matrix and incidence matrix of $G$ respectively, and $A_L$ is the adjacency matrix of the line graph $L(G)$ of $G$.
$(a) \ \ M'M=$ _____.
$(b)$ If $G$ is $k$-regular, then $MM'=$ _____.... | $A_{L}+2 I$ , $A+k I$ | general_qa | 253 |
The following is a multiple choice question (with answers).
===Question
At a certain temperature, when measuring the electromigration rate of $\mathrm{H}^{+}$ using the interface movement method, the interface moved $0.04 \ \mathrm{m}$ in 12.52 minutes. The distance between the electrodes in the migration tube is 0.096... | $$
3. 1 9 \times1 0^{-7} \mathrm{m}^{2} \cdot\mathrm{V}^{-1} \cdot\mathrm{s}^{-1}
$$ | general_qa | 572 |
The following is a multiple choice question (with answers).
===Question
What is definition of Light Energy Utilization Rate?
===Choices
The subdivision of solar energy assimilated and used in plant respiration.
The difference between the sunlight energy available and the energy consumed by plants in photosynthesis.
Th... | The ratio of the energy contained in organic matter accumulated by plant photosynthesis to the sunlight energy per unit area. | general_qa | 194 |
The following is a multiple choice question (with answers).
===Question
Monday chest tightness is characteristic of
===Choices
Chronic obstructive pulmonary disease (COPD)
Asbestosis
Occupational byssinosis
Occupational asthma
Occupational byssinosis with chronic symptoms
Chronic bronchitis
Asthma
Byssinosis
Coal work... | Byssinosis | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
The following descriptions of representatives and their works in Russian socialist realist literature are correct:
I. Gorky's (Максим Горький) most representative works depicting vagabonds are The Lower Depths (На дне) and Malva (Мальва).
II. Nil i... | II and III and V and VI | general_qa | 386 |
The following is a multiple choice question (with answers).
===Question
An airplane is flying at a speed of 530 m/s in stationary air at a temperature of 20°C. Find the Mach number and Mach angle of the airplane. If the airplane passes overhead at an altitude of 800 m, how far past overhead must the airplane fly before... | $$
9 4 2 \mathrm{m}
$$ | general_qa | 233 |
The following is a multiple choice question (with answers).
===Question
Near the surface of the ceramic with $\varepsilon_{\mathrm{r}}=6.0$, the magnitude of the electric field $E$ in the air is $6.0 \times 10^{4} \mathrm{V/m}$, with the direction of $E$ making a 45° angle with the outward normal of the ceramic surface... | $$
3. 1 \times1 0^{-7}~\mathrm{C} / \mathrm{m}^{2}
$$ | general_qa | 430 |
The following is a multiple choice question (with answers).
===Question
A nightclub owner applied for a required zoning permit to open a nude-dancing nightclub in the theater district of a city. An organization of influential city residents began an intensive lobbying effort to persuade the city council to deny the own... | Yes, because the action is not ripe. | general_qa | 366 |
The following is a multiple choice question (with answers).
===Question
According to the Geneva Convention, which of the following actions is prohibited?
===Choices
Deliberately attacking innocent civilians
Refusing to carry out superior
Deploying underage soldiers in combat
Deploying troops without proper training
Mi... | Deliberately attacking innocent civilians | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
In a fiber optic communication system, the signal's optical pulse width is 2 ps. It passes through a fiber with a dispersion parameter of 3000 ps/nm, and the spectral width of the signal is 0.3 nm. Calculate the pulse broadening of the signal (in p... | 1.8 | general_qa | 123 |
The following is a multiple choice question (with answers).
===Question
Relatively speaking, the training method to improve football players' tactical awareness is ()
===Choices
Repetition training method
Variation training method
Contradiction training method
Adaptive training method
Simulation training method
Circui... | Variation training method | general_qa | 71 |
The following is a multiple choice question (with answers).
===Question
After being peeled, apples turn brown due to the action of which substance?
===Choices
Oxidative reductase
Peroxide catalase
Phenol oxidase
Catechol oxidase
Cytochrome oxidase
Tyrosinase activity
Lactate dehydrogenase
Cytochrome oxidase inhibition... | Phenol oxidase | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
In which year did Joseph McCarthy become a senator for Wisconsin?
===Choices
1941
1949
1943
1944
1947
1945
1940
1942
1946
1948 | 1946 | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
What are the conditions necessary for a hemorrhagic infarction?
===Choices
Arterial occlusion, limited collateral network, and low congestion
Arterial blockage, abundant collateral flow, and low swelling
Arterial occlusion, rich collateral circula... | Arterial occlusion, rich collateral circulation, and severe congestion | general_qa | 165 |
The following is a multiple choice question (with answers).
===Question
Consider a rocket engine burning hydrogen and oxygen. The total mass flow of the propellant plus oxidizer into the combustion chamber is
287.2 kg/s. The combustion chamber temperature is 3600 K. Assume that the combustion chamber is a low-velocity ... | $$
{3 0 \mathrm{~ a t m}}
$$ | general_qa | 305 |
The following is a multiple choice question (with answers).
===Question
An ideal gas undergoes a Carnot cycle, producing a net work of 800 J when the heat source temperature is 100°C and the cooler temperature is 0°C. If the cooler temperature remains unchanged and the heat source temperature is increased to raise the ... | $$
4 2. 3 \%
$$ | general_qa | 220 |
The following is a multiple choice question (with answers).
===Question
Two long conducting co-axial cylinders with have radii R and 2R. Their cross section is shown in the figure. The inner one carries a $ \lambda $ charge $ x $ per unit length. A particle of mass m and negative charge - q is given velocity $ v_0 $ pe... | $$ { v }_{ 0 }=\sqrt { \frac { qx }{ \pi \epsilon _{ 0 }m } } $$ | general_qa | 450 |
The following is a multiple choice question (with answers).
===Question
What are the criteria for distinguishing between ion pairs and complexes?
===Choices
Condition status of hydration shell layer
Frequency of electrical conductivity
Connection state of hydration shell layer
Intensity of ionic bond radiation
Integra... | Connection state of hydration shell layer | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
A certain highway requires embankment with a specific dry density of $\boldsymbol{\gamma}_{\mathrm{d}}=17.8 \mathbf{kN} / \mathbf{m}^{3}$, and the required volume for fill is 400,000 $\mathbf{m}^{3}$. The survey results for a particular material si... | 96 | general_qa | 208 |
The following is a multiple choice question (with answers).
===Question
How much dietary protein should athletes consume daily?
===Choices
<0.8 g protein per kg bodyweight per day
1.0-1.5 g protein per kg bodyweight per day
0.8-1.4 g protein per kg bodyweight per day
>2.0 g protein per kg bodyweight per day
0.5-0.8 g ... | 1.2-1.7 g protein per kg bodyweight per day | general_qa | 179 |
The following is a multiple choice question (with answers).
===Question
Assuming that 5 kg of air with an initial pressure of 95 kPa and a temperature of 20°C is compressed isentropically at constant pressure to 40% of its original volume, calculate the change in entropy of the gas after compression.
===Choices
$$
1 8... | $$
1 9 5 2 0 0 0 \mathrm{J}
$$ | general_qa | 292 |
The following is a multiple choice question (with answers).
===Question
A $2$ $\mu F$ capacitor is charged to a potential $=10$V. Another $4$ $\mu F$ capacitor is charged to a potential $=20$V. The two capacitors are then connected in a single loop, with the positive plate of one connected with negative plate of the ot... | $$300 \mu J$$ | general_qa | 173 |
The following is a multiple choice question (with answers).
===Question
The redox titration method was used for the determination of chromium. The sample is decomposed, Cr(III) is oxidized to Cr(VI), and then titrated with about 0.1 mol/L Fe2+ solution. The sample is known to contain about 10% chromium, and to consume ... | 0.5 | general_qa | 152 |
The following is a multiple choice question (with answers).
===Question
Which of the following statements about forestry are correct?
1. Forest ecosystem service value assessment includes soil erosion control
2. Wind force is the main limiting factor for tree growth
3. Shrub forest is one of the forest type classificat... | 4,5 | general_qa | 200 |
The following is a multiple choice question (with answers).
===Question
For one mole of an ideal gas which of the following relation is correct?
===Choices
$$\left(\dfrac { \partial \, P }{ \partial \, T } \right)_{ v }\, \left(\dfrac { \partial \, V }{ \partial \, T } \right)_{ P }\, \left(\dfrac { \partial \, V }{ \... | $$\left(\dfrac { \partial \, P }{ \partial \, T } \right)_{ v }\, \left(\dfrac { \partial \, V }{ \partial \, T } \right)_{ P }\, \left(\dfrac { \partial \, P }{ \partial \, V } \right)_{ T }=-1$$ | general_qa | 695 |
The following is a multiple choice question (with answers).
===Question
Consider a sequence of independent random variables $K_1, K_2, \dots$ defined for $0 \leq p \leq 1/2$, where each $K_i$ follows the distribution: \[ K_i = \begin{cases} 1 & \text{with probability $p$,} \\ -1 & \text{with probability $p$,} \\ 0 & \t... | \frac{1}{4} | general_qa | 329 |
The following is a multiple choice question (with answers).
===Question
A neutron with a rest mass of $940 \mathrm{MeV}$ and a half-life of 13 minutes is 5,000 light-years away from Earth. How much energy is required for this neutron to reach the earth at the end of its first half-life?
===Choices
$$
8. 2 \times1 0^{1... | $$
1. 9 \times1 0^{1 1} \mathrm{M e V}
$$ | general_qa | 326 |
The following is a multiple choice question (with answers).
===Question
Two identical charged particles enter a uniform magnetic field with same speed but at angles $30^{o}$ and $60^{o}$ with field. Let a, b and c be the ratio of their time periods, radii and pitches of the helical paths then:
===Choices
$$abc<1$$
$$a... | $$a =bc$$ | general_qa | 135 |
The following is a multiple choice question (with answers).
===Question
A force $F=-k(x \hat i+y \hat j)$ here k is constant acts on a particle moving is the x-y plane.Starting from the origin,the particle is taken to (a,a) and then to $(a/ \sqrt{2},0)$.The total work done by the force F on the particle is
===Choices
... | $$3ka^2/4$$ | general_qa | 168 |
The following is a multiple choice question (with answers).
===Question
Mutual funds must send their financial statements to shareholders ( ).
===Choices
bi-annually
every decade
every quarter
biennially
once annually
monthly
annually
semi-annually
tri-annually
quarterly | semi-annually | general_qa | 64 |
The following is a multiple choice question (with answers).
===Question
Biogas is a mixture of gases, mainly composed of methane and carbon dioxide. What percentage of the total volume is typically methane?
===Choices
45%-55%
65%-75%
40%-50%
55%-65%
60%-70%
35%-45%
30%-40%
70%-80%
25%-35%
50%-60% | 60%-70% | general_qa | 104 |
The following is a multiple choice question (with answers).
===Question
A simply supported steel beam with a rectangular cross-section is subjected to a concentrated force $P$ at mid-span. When the concentrated force increases to $2P$, and the beam's width is doubled while all other conditions remain unchanged, what is... | 1x | general_qa | 120 |
The following is a multiple choice question (with answers).
===Question
Hart argues that secondary rules are 'power-conferring' but this seems unconvincing in the case of the rule of recognition because:
===Choices
It both confers power and imposes duties on judges to decide cases.
It confers power on the legislature,... | It both confers power and imposes duties on judges to decide cases. | general_qa | 158 |
The following is a multiple choice question (with answers).
===Question
A metallic frustum-shaped conductor made of material with resistivity $\rho$ (constant), a length of $L$, and base radii of $\alpha$ and $b$. What is its resistance value?
===Choices
$$
\frac{\rho \alpha b} {\pi L}
$$
$$
\frac{\rho} {2 \pi \alpha ... | $$
\frac{\rho L} {\pi a b}
$$ | general_qa | 227 |
The following is a multiple choice question (with answers).
===Question
In a series, $R-L-C\, \, AC$ circuit, for a particular value of $R,\, L$ and $C$ power supplied by the source is $P$ at resonance. If the value of inductance is halved, then the power from the source again at resonance is $P'$. Then :
===Choices
P... | $$P= \frac {P'}{2}$$ | general_qa | 186 |
The following is a multiple choice question (with answers).
===Question
What is the primary factor in choosing the length of a key?
===Choices
The size of the lock.
The depth of the slot.
The diameter of the hub.
The width of the key.
The size of the hub.
The strength of the spring.
The twist of the metal.
The diamete... | The length of the hub. | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
A previously healthy 50-year-old woman is brought to the emergency department 30 minutes after she was observed having a seizure. On arrival, she is conscious and reports that she feels drowsy. An MRI of the brain shows a 4-cm, round, sharply demar... | Arachnoid cells | general_qa | 177 |
The following is a multiple choice question (with answers).
===Question
What species of Polymixia fish is named after research scientist Gloria Hollister?
===Choices
Polymixia hollisterius
Polymixia hollisterae
Polymixia hollisteria
Polymixia hollisteraeus
Polymixia hollistera
Polymixia hollisterii
Polymixia hollister... | Polymixia hollisterea | general_qa | 125 |
The following is a multiple choice question (with answers).
===Question
What were the two great masterpieces completed by Carl Friedrich Gauss as a private scholar?
===Choices
Disquisitiones Arithmeticae and Theoria motus corporum coelestium, pars tertia
Disquisitiones Arithmeticae and Theoria combinationis erroribus ... | Disquisitiones Arithmeticae and Theoria motus corporum coelestium | general_qa | 249 |
The following is a multiple choice question (with answers).
===Question
A planer with a gantry, where gear 1 is directly connected to the motor, provides data for each gear and the worktable. Given: cutting force $\mathrm{F}_{\mathrm{z}}=9810 \, \mathrm{N}$, cutting speed $\nu_{\mathrm{z}}=43 \, \mathrm{m/min}$, transm... | 11kW | general_qa | 230 |
The following is a multiple choice question (with answers).
===Question
For a piston sound source with a radius of 0.12 m mounted on an infinitely large rigid baffle, emitting sound waves at a frequency of 2000 Hz, find the beamwidth where the sound pressure level decreases by 6 dB. (Operating in air)
===Choices
$$
2 ... | $$
3 0^{\circ} \times2=6 0^{\circ}
$$ | general_qa | 294 |
The following is a multiple choice question (with answers).
===Question
Cultivated tobacco, Nicotine tobacco has $2n=48$ chromosomes and is amphidiploids. Nicotine Sylvester's which one of the progenitors of Nicotine tobacco has $2n=24$ chromosomes and is diploid. It has contributed one genome to Nicottama tobacco. Whe... | $24$ bivalents | general_qa | 201 |
The following is a multiple choice question (with answers).
===Question
The average altitude of China's Qinghai-Tibetan Plateau is about 4,000 meters, so what is the average air pressure on the ground?
===Choices
450hPa
900hPa
600hPa
850hPa
700hPa
750hPa
550hPa
800hPa
650hPa
500hPa | 600hPa | general_qa | 111 |
The following is a multiple choice question (with answers).
===Question
The common point in the preparation processes of both drop pills and soft gel capsules is ( ).
===Choices
Both use gelatin as a membrane material
Both require a heating process during preparation
Both are filled with solid drug particles
Both are ... | Both are prepared using the drop method | general_qa | 114 |
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