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
Clausthalite is a mineral composed of lead selenide (PbSe). The mineral adopts a NaCl-type structure. The density of PbSe at 25 °C is $8. 2 7 \, \mathrm{g / c m}^{3}.$ What is the edge length of the PbSe unit cell?
===Choices
$5.78\AA$
$6.50\AA$
$... | $6.13\AA$ | general_qa | 169 |
The following is a multiple choice question (with answers).
===Question
Anscombe criticizes Butler on the grounds that:
===Choices
the concept of "pleasure" is unclear.
the notion of "freedom" is overly simplistic.
the concept of "identity" is too subjective.
we can't really distinguish between good and evil.
the conc... | our consciences are fallible. | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Given that the operating frequency $f = 150$ MHz. At $z = 0$. A uniform plane wave propagates in an ideal medium ($\mu=\mu_0, \varepsilon=4\varepsilon_0, \sigma=0$), and the expression for its electric field intensity $E$ is $E=a_{x}10\cos(\omega t... | $$
2. 8 \times1 0^{-3} \quad\mu\mathrm{s}
$$ | general_qa | 378 |
The following is a multiple choice question (with answers).
===Question
Which of the following words contains two free morphemes?
===Choices
bicycle
autopilot
refuel
microphone
butterfly
keyboard
skyscraper
telephone
unicycle
teacup | autopilot | general_qa | 58 |
The following is a multiple choice question (with answers).
===Question
During the startup of a nuclear reactor, when the boron concentration is $C_{\mathrm{B}} = 1500 \, \mathrm{ppm}$, the average counting rate is $n_{1}$, and it is known that the core's $k_{\mathrm{eff, 1}} = 0.97$. When the boron concentration is di... | $$2489.2~\mathrm{p c m}$$ | general_qa | 335 |
The following is a multiple choice question (with answers).
===Question
Identify the correct sequence of stages in Kuhlthau's Information Search Process
(a)Formulation
(b)Exploration
(c)Selection
(d)Collection
===Choices
(c),(d),(a) and (b)
(b),(d),(a) and (c)
(c),(b),(a) and (d)
(b),(a),(c) and (d)
(d),(c),(b) and (a... | (c),(b),(a) and (d) | general_qa | 152 |
The following is a multiple choice question (with answers).
===Question
An ammonia compression refrigeration device employing a throttle valve has a theoretical compressor power of $50 kW$, with an ammonia evaporation temperature of $-15°C$. At the compressor inlet, the ammonia is in a wet vapor state, and after revers... | $$
- 4 2 5. 4 7 k J / k g
$$ | general_qa | 323 |
The following is a multiple choice question (with answers).
===Question
In which year was Huating Prefecture renamed to Songjiang Prefecture?
===Choices
1288
1278
1275
1289
1280
1281
1277
1279
1287
1276 | 1278 | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
A thermometer indicates that it takes $1 \mathrm{\ min}$ to respond to 98% of a step input signal. Assuming the thermometer is a first-order system, what is its time constant?
If the thermometer is placed in a bathtub and the temperature changes li... | $$
0. 2 5 \ \mathrm{m i n},
$$
$$
2. 5 \ \mathrm{d e g r e e s}
$$ | general_qa | 475 |
The following is a multiple choice question (with answers).
===Question
Among the cranial nerves of fish, the number of purely motor nerves is ().
===Choices
2 pairs
1 pair
7 pairs
6 pairs
3 pairs
5 pairs
10 pairs
8 pairs
4 pairs
9 pairs | 3 pairs | general_qa | 64 |
The following is a multiple choice question (with answers).
===Question
A man of mass 50 kg falls freely from a height of 40 m into a swimming pool and just come to rest at the bottom of the pool. Assume that the average upward force on the man due to water is 1000 N. If depth of water in the pool is $d$, then $d$ is $... | 20 m | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
Three boys are running on a equitriangular track with the same speed $5\ m{s}^{-1}$. At start, they were at the three corners with velocity along indicated direction. The velocity of approach of any one of them towards another at $t=10\ s$ equals
... | $$0\ m{s}^{-1}$$ | general_qa | 186 |
The following is a multiple choice question (with answers).
===Question
Alice owned Greyacre, a one-acre piece of property, in fee simple. Alice sold the property to Barbara who moved into the only residence on the land. Barbara neglected to record the deed, and three years later, Alice conveyed the same property to Ch... | Barbara, because Charlene had notice of the prior conveyance between Alice and Barbara. | general_qa | 248 |
The following is a multiple choice question (with answers).
===Question
In a certain processes, a gas absorbs 'Q' amount of heat and performs 'nQ' amount of work, the molar heat capacity of the gas in the processes is $\left( {given\dfrac{{{C_p}}}{{{C_v}}} = Y} \right)$
===Choices
$$\dfrac{{\left( {n - 1} \right)RY}}{... | $$\dfrac{{\left( {1 - n} \right)RY}}{{\left( {1 - Y} \right)}}$$ | general_qa | 385 |
The following is a multiple choice question (with answers).
===Question
The active form of vitamin A is ___, which can be combined with optic proteins to form ___ , the latter of which is necessary to maintain ___ vision.
===Choices
9-cis-retinal, rhodopsin, dim
11-cis-retinal, rhodopsin, dark
13-cis-retinal, opsin, d... | 11-cis-retinal, rhodopsin, dark | general_qa | 172 |
The following is a multiple choice question (with answers).
===Question
Consider a particle of mass m moving in two dimensions between two perfectly reflecting walls which intersect at an angle x at the origin (see figure). Assume that when the particle is reflected, its speed is unchanged and its angle of incidence eq... | The equation for distance of closest approach to the origin is $\dfrac{1}{2}mv^2 - \dfrac{C}{R^3} = \dfrac{m^2v_y^2R^2}{2mr_m^2} - \dfrac{C}{r^2_m}$ where $r_{m}$ is distance of closest approach. | general_qa | 783 |
The following is a multiple choice question (with answers).
===Question
The nutritive value of diet is greatly enhanced by inclusion of fish in diet. Which of the following nutrient is deficient in fish?
===Choices
Vitamin B12
Iodine
Phosphorus
Magnesium
Copper
Calcium
Vitamin B6
Zinc
Vitamin A
Iron | Iron | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
According to the 2011 Nepal census, what percentage of the population of Nepal speaks Urdu?
===Choices
2.61%
2.64%
2.60%
2.17%
2.66%
2.63%
2.65%
2.16%
2.11%
2.62% | 2.61% | general_qa | 88 |
The following is a multiple choice question (with answers).
===Question
The four main divisions of philosophy are metaphysics,epistemology,axiology,and().
===Choices
aesthetics.
astrology.
psychology.
dialectics.
linguistics.
logic.
empiricism.
theology.
rhetoric.
mysticism. | logic. | general_qa | 70 |
The following is a multiple choice question (with answers).
===Question
If the image function
$$
F ( s ) \!=\! {\frac{s^{2} \!+\! s \!+\! 1} {( s^{2} \!+\! 4 ) \, ( s \!+\! 2 )}}
$$
of the Laplace transform, the domain of convergence is σ > 0 then the corresponding original function ft) =____.
===Choices
$$
f ( t )={\... | $$
f ( t )={\frac{1} {8}} \left[ 5 \mathrm{c o s} 2 t-\mathrm{s i n} 2 t+3 \mathrm{e}^{-2 t} \right] e \left( t \right)
$$ | general_qa | 714 |
The following is a multiple choice question (with answers).
===Question
A spring oscillator performs simple harmonic motion with an amplitude of $12 \text{ cm}$. At a distance of $6 \text{ cm}$ from the equilibrium position, its velocity is $24 \ \text{cm} \cdot \text{s}^{-1}$. Find the displacement when the velocity i... | $$
\approx\pm1 0. 8 \, ( \mathrm{c m} )
$$ | general_qa | 321 |
The following is a multiple choice question (with answers).
===Question
What is the belief in religion that the soul is a supernatural being that resides within the individual, endows the individual with vitality, and can be independent of form and dominate its activities?
===Choices
Essence belief
Vital force
Life pr... | Soul concept | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
Determine the content of berberine and coptisine in the alkaloid sample by weighing 0.2000g each of the internal standard, berberine, and coptisine reference substances to prepare a mixed solution. The measured peak areas are 3.60, 3.43, and 4.04 c... | $$w_{berberine}(\%)=26.25\%\\w_{coptisine}(\%)=27.26\%$$ | general_qa | 548 |
The following is a multiple choice question (with answers).
===Question
In the barometer, the reading is inaccurate due to the surface effect of mercury. Given that the surface tension coefficient of mercury is $\alpha = 0.49 \mathrm{N/m}$, the inner diameter of the barometer glass tube is $d = 2.0 \mathrm{mm}$, and th... | $$
1. 0 1 \times1 0^{5} \mathrm{P a}
$$ | general_qa | 390 |
The following is a multiple choice question (with answers).
===Question
What is the chemical formula for sodium benzoate?
===Choices
C7H5NaO10
C7H5NaO4
C7H5NaO22
C7H5NaO6
C7H5NaO5
C7H5NaO3
C7H5NaO7
C7H5NaO2
C7H6NaO2
C7H5NaO1 | C7H5NaO2 | general_qa | 109 |
The following is a multiple choice question (with answers).
===Question
Given the plane region $\mathbf{D}=\{\ \ ( \mathbf{x}, \ \ \mathbf{y} ) |\ \ \ x^{2}+\mathbf{y}^{2} \leq2 \mathbf{y} \}$, what is the value of the double integral $\iint_{D} ( x+1 )^{2} \mathrm{d} x \mathrm{d} y$ ?
===Choices
$$
{\frac{3} {2}} \pi... | $$
{\frac{5} {4}} \pi
$$ | general_qa | 244 |
The following is a multiple choice question (with answers).
===Question
The area of two parallel metal plates is (S), the distance between them is (d) ((d) is very small), and they carry charges (+q) and (-q) respectively. The space between the two plates is a vacuum. The force between the two plates is calculated by t... | (F=qleft(frac{q}{2varepsilon_{0}S}right)) | general_qa | 281 |
The following is a multiple choice question (with answers).
===Question
The second-order approximate solution for the equation ${\frac{\mathrm{d} y} {\mathrm{d} x}}=x+y^{2}$ passing through the origin $(0, 0)$ is _____.
===Choices
$y_{2} \left( x \right)=\frac{3} {7} x^{}+\frac{1} {1 0} x^{3}$
$y_{2} \left( x \right)=... | $y_{2} \left( x \right)=\frac{1} {2} x^{2}+\frac{1} {2 0} x^{3}$ | general_qa | 439 |
The following is a multiple choice question (with answers).
===Question
From the perspective of economy and production cycle, which of the following is best for single piece production of casings?
===Choices
Rubber objects
Paper items
Fiber elements
Glass fragments
Plastic parts
Metal components
Stone blocks
Wooden pi... | Plastic parts | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
On average, how many trough ridges are maintained in the Westerly Wind Belt during the summer?
===Choices
8
1
3
4
2
5
9
7
6
10 | 4 | general_qa | 58 |
The following is a multiple choice question (with answers).
===Question
Whether knowledge can be converted into economic value depends on ().
===Choices
The extent of competition in the industry
The conversion rate of knowledge productivity
Human subjective initiative
The availability of financial resources to invest ... | The conversion rate of knowledge productivity | general_qa | 105 |
The following is a multiple choice question (with answers).
===Question
On dissolving $10.8\ g$ of glucose $(m.w.=180)$ in $240\ g$ of water, its boilig point increases by $0.13^{o}C$. Then the molal elevation constant of water is
===Choices
104.11
222.1
111.0
104.22
100
222.2
111.2
104.23
104.1
111.1 | 111.1 | general_qa | 135 |
The following is a multiple choice question (with answers).
===Question
A hollow shaft with an outer diameter $D=100 \, \mathrm{mm}$, an inner diameter $d=50 \, \mathrm{mm}$, $G=80 \, \mathrm{GPa}$, and $[\theta]=0.75^{\circ} / \mathrm{m}$ is given. Determine the maximum torque $T_{\mathrm{max}}$ that the shaft can wit... | $$9.63kN·m$$ | general_qa | 222 |
The following is a multiple choice question (with answers).
===Question
After injecting mice with a mixture of a toxic but killed bacterium and a nontoxic live bacterium, the mice became ill and live toxic bacteria were isolated from the mice. This phenomenon is ___.
===Choices
Adaptation
Mutation
Genetic exchange
Sex... | Transformation | general_qa | 89 |
The following is a multiple choice question (with answers).
===Question
What kind of emotion is hidden in "Parasite Grass"?
===Choices
Tranquility and inner peace
Nostalgia for lost traditions
Bold and unrestrained, carefree
Achievement of inner enlightenment
Parting sentiment between master and apprentice
Regret and ... | Regret and helplessness | general_qa | 101 |
The following is a multiple choice question (with answers).
===Question
Find the positive number $m$ such that the area in the first quadrant bounded by the line $y = \frac{1}{56} x$, the $x$-axis, and the ellipse $\frac{1}{441} x^2 + y^2 = 1$ is equal to the area of the region in the first quadrant bounded by the line... | \frac{56}{441} | general_qa | 231 |
The following is a multiple choice question (with answers).
===Question
If uranium is used as the nuclear material, how many kilograms of weapons-grade uranium are needed to make one atomic bomb?
===Choices
30kg.
22kg.
16kg.
20kg.
5kg.
8kg.
18kg.
25kg.
12kg.
15kg. | 16kg. | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
Which of the following condition can Compound Bear Bile Eye Drops be used for?
===Choices
refractive eye error
acute conjunctivitis
chronic eyelid inflammation
allergic eye itching
cataracts
night vision problems
optic nerve atrophy
dry eye syndro... | acute conjunctivitis | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
When VOCs are removed by the soil method of the biofiltration process, the VOCs are primarily degraded by soil microorganisms. Which of the following is a suitable condition for the survival of this type of microorganism?
===Choices
Temperature 10... | Temperature 5-30 degrees Celsius, Relative humidity 50-70% | general_qa | 251 |
The following is a multiple choice question (with answers).
===Question
Consider the functions
$$\begin{align*} f_1 (x) &= 2x \\ f_2 (x) &= 8x+3 \end{align*}$$
Find the number of positive integers $n < 131072$ which can be written in the form $f_{a_1}(f_{a_2}( \dots f_{a_k}(1) \dots ))$ for some positive integer $k$ an... | 870 | general_qa | 195 |
The following is a multiple choice question (with answers).
===Question
Porphyry and matrix of porphyritic structure are mostly formed in the () generation; porphyritic-like structure of porphyritic crystal and matrix are basically the products of the () generation.
===Choices
Different, Same
First, Intermediate
First... | Different, Same | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
Known linear programming problems:$$\operatorname* {m i n} z=2 x_{1}+3 x_{2}+5 x_{3}+2 x_{4}+3 x_{5}$$ $$\mathrm{s. ~ t} \quad\left\{\begin{aligned} {{{}}} & {{{} {{} x_{1}+x_{2}+2 x_{3}+x_{4}+3 x_{5} \geq4}}} \\ {{{}}} & {{{} {{} 2 x_{1}-2 x_{2}+3... | The optimal solution is $X^{*}=\left( 1, 0, 0, 0, 1 \right)^{T}$ and the optimal value of the objective function $\omega^{*}=5$. | general_qa | 746 |
The following is a multiple choice question (with answers).
===Question
The effective value of the breakdown voltage of a sphere gap during a power frequency AC voltage test is $500 \mathrm{kV}$, with an air pressure of $100 \mathrm{kPa}$, a temperature of 20°C, and a humidity of $20 \mathrm{g/cm}^{3}$. What is the pow... | $$
U_{0}=4 6 9. 7 0
$$ | general_qa | 273 |
The following is a multiple choice question (with answers).
===Question
If a household chose to save 10 percent of its income and to addthree quarters of its saving to cash balances, what wouldbe the value of the loan contracts it demanded when itsincome totaled $30,000 per year?
===Choices
$900
$750
$1,500
$6,000
$4,... | Both $2,250 and $2,250 * 1 are correct | general_qa | 148 |
The following is a multiple choice question (with answers).
===Question
Recently, Zhang Guangming lacks interest in things around him, does not have any emotional response to changes in the external environment, does not take a bath, does not change clothes, and lacks behavioral motivation and purpose. So what is his p... | Impairment of will | general_qa | 107 |
The following is a multiple choice question (with answers).
===Question
How many people in the First Chamber of the Reichstag voted in favor of the Enabling Act of 1933?
===Choices
447
443
449
444
445
446
448
442
440
441 | 444 | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
Find the smallest positive integer $n$ such that ${2n \choose n}$ is divisible by all the primes between $10$ and $30$ .
===Choices
137
138
133
131
135
134
130
139
132
136 | 131 | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
Who choreographed Issey Miyake's produced "Aomori University Men's Rhythmic Gymnastics Team" performance?
===Choices
Daniel Ezralow
Daniel Ezralowicz
Danial Ezralow
Dan Ezralowicz
David Ezzralow
Daniel Ezrow
Daniel Ezrallov
Dan Ezralow
David Ezrow... | Daniel Ezralow | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
There is a dust particle on a glass slab of thickness t and refractive index $\mu = 1.5$. When seen from the top side of the slab, the dust particle appears at a distance of 6 cm. From another side, it appears at a distance of 6 cm. On another sid... | $$15 cm$$ | general_qa | 156 |
The following is a multiple choice question (with answers).
===Question
What is the reason for the sun producing bright red or orange-yellow hues during sunrise and sunset?
===Choices
Blue and green light waves have shorter wavelengths and their scattering effects are significant.
Blue and green light waves have short... | Red and yellow light waves have longer wavelengths and their transmission effects are significant. | general_qa | 186 |
The following is a multiple choice question (with answers).
===Question
The correct order of increasing basicity of the given conjugate bases (${R}=$ $CH_3$) is:
===Choices
$\mathrm{H}\mathrm{C} ={\mathrm{C}}^-<\mathrm{R}\mathrm{C}\mathrm{O}{\mathrm{O}}^-<{\mathrm{R}}^-<{\mathrm{N}}\mathrm{H}_{2}^-$
$\mathrm{R}\mathrm... | $\mathrm{R}\mathrm{C}\mathrm{O}\mathrm{O}^-< \mathrm{H}\mathrm{C}$ $\equiv {\mathrm{C}}^-<\mathrm{N}\mathrm{H}_{2}^-<\mathrm{R}^-$ | general_qa | 377 |
The following is a multiple choice question (with answers).
===Question
A characteristic of amino acids at their____point is that they do not move in an electric field.
===Choices
freezing
melting
neutral
high-point
basic
midpoint
isoelectric
boiling
acidic
critical | isoelectric | general_qa | 64 |
The following is a multiple choice question (with answers).
===Question
What international agreement, signed in 1997 and came into effect in 2005, aimed to reduce carbon emissions?
===Choices
The Kyoto Convention
The Kyoto Accord
The Paris Agreement
The Kyoto Treaty
The Kyoto Protocol
The Kyoto Agreement
The Copenhage... | The Kyoto Protocol | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
A theoretical mixture of CO and O₂ undergoes an explosion in a container. The initial pressure and temperature of the reactants in the container are 1 atm and 600 K, respectively. Given that the equilibrium constant at 4500 K is 26.3, calculate the... | 5.2atm | general_qa | 136 |
The following is a multiple choice question (with answers).
===Question
The rotational constant of the $^{1}H^{35}Cl$ molecule, measured experimentally, is $B = 10.397 \ cm^{-1}$. The reduced mass of this molecule is $1.63 \times 10^{-27} \ kg$. What is the equilibrium distance between the two atoms in the HCl molecule... | 0.129nm | general_qa | 164 |
The following is a multiple choice question (with answers).
===Question
The New Democratic Society belongs to ().
===Choices
Colonial system
Feudal system
Theocratic system
Oligarchic system
Socialist system
Semi colonial and semi feudal system
Monarchical system
Federal system
Capitalist system
Mixed economy system | Socialist system | general_qa | 70 |
The following is a multiple choice question (with answers).
===Question
Water content in infant
===Choices
60-70 %
75-80 %
73-78 %
70-75 %
70-80 %
> 90%
78-83 %
80-90 %
65-75 %
77-82 % | 75-80 % | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
Directing a thermal neutron beam onto a crystal, the energy of the thermal neutrons can be determined from the Bragg diffraction pattern. If the atomic spacing of the crystal is 0.18 nm and the first-order Bragg grazing angle is 30°, calculate the ... | $$
0. 0 2 5 ( \mathrm{e V} )
$$ | general_qa | 280 |
The following is a multiple choice question (with answers).
===Question
A farmer working in the sugar cane industry comes to you for advice on how to prevent fungal infection (bagassosis) of the lung. His elder brother was diagnosed to have bagassosis 1 month ago. You would advise him to spray the sugar cane with which... | 2% propionic acid | general_qa | 145 |
The following is a multiple choice question (with answers).
===Question
Which of the following is appropriate for samples handling of metal poisons?
===Choices
Organic destruction method
Biological reduction technique
Elemental dispersion technique
Natural degradation process
Inorganic containing approach
Thermal brea... | Organic destruction method | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
Which of the following is a soluble dietary fiber?
===Choices
Keratin
Starch
Collagen
Hemicellulose
Inulin
Pectin
Chitin
Cellulose
Xylan
Lignin | Pectin | general_qa | 63 |
The following is a multiple choice question (with answers).
===Question
What is the relationship between changes in airflow and pressure changes in reversible adiabatic stable flow?
===Choices
dh = - pdv
dv = pdh
pd = - vdh
dp = - vdh
dp = vdh
dh = vdp
dh = - vdp
dv = - pdh
pd = vdh
dh = pdv | dh = vdp | general_qa | 91 |
The following is a multiple choice question (with answers).
===Question
A 10-month-old child presents with 2 weeks history of fever, vomiting and alteration of sensorium. Cranial CT scan reveals basal exudates and hydrocephalus, the most likely etiological agent is:
===Choices
Streptococcus pneumoniae
Mycobacterium av... | Mycobacterium tuberculosis | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
In a complex circuit, when using Thevenin's theorem to simplify the circuit, if the Thevenin resistance is zero, what does this mean?
===Choices
There is an ideal voltage source in the circuit
There is a total voltage breakdown in the circuit
The ... | There is an ideal current source in the circuit | general_qa | 141 |
The following is a multiple choice question (with answers).
===Question
Magnesium ($Mg$) has an $HCP$ crystal structure, a c/a ratio of 1.624, and a density of $1.74 g/cm^{3}$. The atomic radius for Mg.is().
===Choices
$$
0. 1 3 0 \mathrm{~ n m}
$$
$$
0. 1 6 0 \mathrm{~ n m}
$$
$$
0. 1 8 0 \mathrm{~ n m}
$$
$$
0. 2 0 ... | $$
0. 1 6 0 \mathrm{~ n m}
$$ | general_qa | 257 |
The following is a multiple choice question (with answers).
===Question
If the government of country Z increases spending by $12 million dollars and raises tax collections by the same amount then what will be the overall impact of these moves on real GDP in country Z?
===Choices
Real GDP will remain unchanged.
Real GD... | Real GDP will increase by $12 million. | general_qa | 152 |
The following is a multiple choice question (with answers).
===Question
The pine nuts that we often eat come from the seeds of which of the following plants?
===Choices
White Pine
Chinese Red Pine
Himalayan Pine
Cedar
Red Pine
Scots Pine
Norwegian Fir
Japanese Black Pine
Korean Pine | Red Pine | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
For the estimation problem of the unknown level $A$ in Gaussian white noise, in both cases the noise variance is known and the noise variance is unknown (needs to be estimated simultaneously with $A$), the CRLB of the unknown level $A$ is:________.... | Identical | general_qa | 150 |
The following is a multiple choice question (with answers).
===Question
Total Magnetic Moment is, (Assuming the state of hydrogen is:
$\hat{\psi}=\left(\begin{array}{cc} \frac{1}{2}R_{21}(r)Y_{11}(\theta,\varphi))
===Choices
$bar{M_z}=frac{5}{4}M_B
$bar{M_z}=frac{3}{4}M_B$
$bar{M_z}=frac{7}{4}M_B
$bar{M_z}=frac{1}{4}M... | $bar{M_z}=frac{1}{4}M_B$ | general_qa | 220 |
The following is a multiple choice question (with answers).
===Question
A sample of the sugar D-ribose of mass $0.727 \mathrm{~g}$ was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by $0.910 \mathrm{~K}$. In a separate experiment in the same calorimeter, the combustion ... | -1270 $\mathrm{~kJ} \mathrm{~mol}^{-1}$ | general_qa | 374 |
The following is a multiple choice question (with answers).
===Question
What is the primary factor that influences the bolting of leafy vegetables?
===Choices
Soil pH
Leaf maturity stages
Water availability
Wind exposure frequency
Disease presence
Daylight hours duration
Humidity variations
Pesticide usage consistency... | Temperature fluctuations | general_qa | 72 |
The following is a multiple choice question (with answers).
===Question
What is the most commonly used test method for SF6 gas insulated equipment?
===Choices
gas density level assessment
fluid contamination level measurement
pressure decrease detection method
gas decomposition product analysis
electrical insulation r... | gas decomposition product analysis | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
Three similar oscillators, A, B, C have the same small damping constant $r$, but different natural frequencies $\omega_0 = (k/m)^{\frac{1}{2}} : 1200 Hz, 1800 Hz, 2400 Hz$. If all three are driven by the same source at $1800 Hz$, which statement is... | $$\phi_A = \phi_B = \phi_c$$ | general_qa | 243 |
The following is a multiple choice question (with answers).
===Question
In which year did Ann Lee establish the Shakers in England?
===Choices
1774
1777
1779
1770
1778
1771
1773
1775
1772
1776 | 1774 | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
An electron is released from rest at one point in a uniform electric field and moves a distance of 10 cm in 10^-7 sec. What is the electric field strength and what is the voltage between the two points?
===Choices
3.8 × 10^-3 statV/cm and 11.4 V
3... | 3.8 × 10^-3 statV/cm and 11.4 V | general_qa | 260 |
The following is a multiple choice question (with answers).
===Question
The current conductor varies with time 't' as $I=3t+4{ t }^{ 2 }$. The electricity charges, flows through the section of conductor between $t=1s$ and $t=3s$ is
===Choices
\cfrac{140}{13}
$$\cfrac{14}{3}$$
\cfrac{140}{14} C
$$\cfrac { 3 }{ 140 } C$... | $$\cfrac{14}{3}$$ | general_qa | 177 |
The following is a multiple choice question (with answers).
===Question
When was Seventeen's single 'Sun Wukong' released?
===Choices
2023
2022
2021
2028
2024
2025
2026
2020
2027
2029 | 2023 | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
Who was the first to scientifically define information?
===Choices
J.B.S.Haldane
R.V.L.Hartley
S.C.Bradford
E.T.Whittaker
N.Wiener
B.F.Skinner
G.D.Birkhoff | R.V.L.Hartley | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
The wind is blowing from the southwest at a speed of $v_{w} = 100 \text{ km/h}$. The airplane's nose is pointing 15° south of west, with a course of due west. Determine the airplane's speed relative to the air, $v_{r}$, and its speed relative to th... | $$
273 km/h
$$
$$
264km/h
$$ | general_qa | 295 |
The following is a multiple choice question (with answers).
===Question
If the length of the target string is $\mathbf{n}$ and the length of the pattern string is $[ n / 3 ]$, then when executing the pattern matching algorithm, the time complexity in the worst-case scenario is ().
===Choices
$\mathrm{ ~ O ~ ( n \log n... | $\mathrm{ ~ O ~ ( n^{2} )}$ | general_qa | 173 |
The following is a multiple choice question (with answers).
===Question
A 23-year-old female experiences nausea and vomiting after consuming dried fish fillets and beer. A few hours later, she complains of numbness in the lips, weakness in the limbs, followed by difficulty breathing and coma. The most likely diagnosis ... | Pufferfish (fugu) poisoning | general_qa | 130 |
The following is a multiple choice question (with answers).
===Question
The correct stability order of the following resonance structure is:(I) ${{\text{H}}_{\text{2}}}\mathop {\text{C}}\limits^ - - \mathop {\text{N}}\limits^ + \equiv {\text{N}}$(II) ${{\text{H}}_{\text{2}}}{\text{C}} = \mathop {\text{N}}\limits^ +... | (II) > (I) > (III) > (IV) | general_qa | 385 |
The following is a multiple choice question (with answers).
===Question
What are the three dimensions of intimacy in romantic relationships that outline closeness and sharing?
===Choices
trust, caring, and sexuality
affective, trusting, and friendship
emotional, rational, and friendship
becoming emotional, caring, and... | affective, cognitive, and physical | general_qa | 117 |
The following is a multiple choice question (with answers).
===Question
Using H-type strong acid cation resin to remove $\mathrm{Na}^{+}$ and $\mathrm{K}^{+}$ from seawater (assuming these are the only two cations present in seawater), given that the concentration of $\mathrm{H}^{+}$ in the resin is $0.3 \mathrm{mol/L}... | $$
x_{K^{+}}=0. 0 2 3 \;, \; \; x_{N a^{+}}=0. 1 6 2
$$ | general_qa | 638 |
The following is a multiple choice question (with answers).
===Question
The film "The Birth of a Great Nation" depicts which historical event?
===Choices
The Spanish-American War
The Great Depression
The Vietnam War
The American Revolution
The Gulf War
The Civil War
The French Revolution
The Mexican-American War
The W... | The Civil War | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
Which of the following is an advantage of synchronous communication?
===Choices
Consistent with asynchronous platforms
Decreases overall system reliability
Requires more complex error handling
Suitable for burst data transmission
Incompatible with... | Easy to implement network management | general_qa | 91 |
The following is a multiple choice question (with answers).
===Question
The outer skin of Danshen root is ()
===Choices
Deep blue
Pale white
Clear gray
Brick red
Dark green
Earth yellow
Light purple
Brownish
Brown
Yellow | Brick red | general_qa | 54 |
The following is a multiple choice question (with answers).
===Question
What was the rate of climb of the Grumman F4F-3 Wildcat (1937) in meters per second?
===Choices
11.72 m/
11.68 m/
11.71 m/
11.80 m/
11.75 m/
11.65 m/
11.70 m/
11.73 m/
11.74 m/
11.60 m/ | 11.70 m/ | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
In the structure of the heart, the biggest difference between birds and mammals is located in ( ).
===Choices
Aortic orifice
Right atrioventricular orifice
Left ventricular chamber
Myocardial fiber alignment
Right auricular appendage
Pulmonary ori... | Right atrioventricular orifice | general_qa | 97 |
The following is a multiple choice question (with answers).
===Question
"An unjust law is not a law" reflects ()?
===Choices
The notion that moral principles are separate from legal codes.
The belief that societal norms are above legal statutes.
The View that Positive Law is Superior to Natural Law
The viewpoint that ... | The viewpoint that natural law is superior to positive law. | general_qa | 141 |
The following is a multiple choice question (with answers).
===Question
Solubility of $CO_{2}(g)$ in water at $1\ bar$ and $25^{\circ}C$ involves the following equilibria:$CO_{2}(g) \rightleftharpoons CO_{2}(aq); K_{1}^{\circ} = 0.04$$CO_{2}(aq.) + H_{2}O(l) \rightleftharpoons H^{+}(aq.) + HCO_{3}^{-}(aq); K_{2}^{\circ... | $$4\times 10^{-3}M$$ | general_qa | 340 |
The following is a multiple choice question (with answers).
===Question
A 77-year-old man has a lesion on the right side of his face that has enlarged slowly over the past 5 years. On examination, the 3-cm lesion has irregular borders, irregular brown to black pigmentation, and a central 2-mm raised blue-black nodule. ... | BRAF | general_qa | 178 |
The following is a multiple choice question (with answers).
===Question
For the equilibrium reaction, $3Fe+4{H}_{2}O\Leftrightarrow {Fe}_{3}{O}_{4}+4{H}_{2}$ the relation between ${K}_{p}$ and ${K}_{c}$
===Choices
${K}_{P}={K}_{C} \times {(2TR)}^{2}$
${K}_{P}<{K}_{C} \times {(2TR)}^{2}$
$${K}_{P}={K}_{C}\times{(TR)}^{... | $${K}_{P}> {K}_{C}$$ | general_qa | 254 |
The following is a multiple choice question (with answers).
===Question
Alluvial logistics flows from the mouth of the bay to the top of the bay. As the flow velocity decreases after entering the bay, the capacity of alluvial logistics becomes smaller and its intensity increases. When the intensity is greater than the ... | sand dam, marsh | general_qa | 195 |
The following is a multiple choice question (with answers).
===Question
$0.1M$ KI and $0.2M \,\,AgNO_3$ are mixed in $3:1$ volume ratio.The depression of freezing point of the resulting solution will be $[K_f(H_2O)=1.86K\,kg mol^{-1}]$
===Choices
$1.86$K
$0.45$K
2.74K
1.36K
2.78K
2.76K
$2.68$K
$0.93$K
2.70K
$0.279$K | $0.279$K | general_qa | 152 |
The following is a multiple choice question (with answers).
===Question
What is the molar mass of rhenium diboride in g/mol?
===Choices
207.8038
207.803
207.80
207.388
207.808
207.83
207.88
207.833
207.38
207.33 | 207.83 | general_qa | 109 |
The following is a multiple choice question (with answers).
===Question
From 1912 to 1921, China's private capitalist economy achieved unprecedented development. However, the development of modern private capitalism has always been plagued by a shortage of funds. The main reasons for bureaucrats and businessmen to inve... | Capitalist industry and commerce are risky | general_qa | 166 |
The following is a multiple choice question (with answers).
===Question
The hydrogen-filled dirigible "Hindenberg" had a gas volume of 1.4 × 10^8 liters. Assuming that it was filled to a pressure of 1 atm at 0°C, how much energy was released when it burned to gaseous products at a reaction temperature of 25°C? The stan... | 360 × 10^6 Kcal | general_qa | 228 |
The following is a multiple choice question (with answers).
===Question
The sense of inferiority refers to a self-experience characterized by undervaluing oneself, lacking self-belief, and holding a negative attitude towards oneself. At which stage does it originate?
===Choices
Adulthood
Junior high school
College
Pre... | Junior high school | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
( ) serves as the bridge between scientific management and modern management:
===Choices
Management process theory.
Human relations theory.
The relationship between leaders and subordinates.
Classical management theory. | Human relations theory. | general_qa | 51 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.