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
In drying operation, multi-stage or intermediate heating is suitable for drying of () materials, and partial exhaust gas circulation is suitable for drying of () materials.
===Choices
High heat capacity, prolonged heating; Prone to microbial growt... | Cannot withstand high temperatures, heat sensitivity; Prone to warping, cracking (internal migration control) | general_qa | 236 |
The following is a multiple choice question (with answers).
===Question
A $\mathrm{C u}-{30}\%\mathrm{Z n}$ brass cold-rolled sheet undergoes 25% cold deformation, reducing its thickness to $1 \, \mathrm{cm}$. Then, the thickness is further reduced to $0.6 \, \mathrm{cm}$. Calculate the total engineering strain and tru... | $$
\approx-5 5 \%
$$
$$
\approx-8 0 \%
$$ | general_qa | 330 |
The following is a multiple choice question (with answers).
===Question
There are two gold ore bodies. The inclination of ore body I is < 30Β°, and the inclination of ore body II is > 60Β°. When sampling the face, what should be done?
===Choices
Sloping grooving is used for ore body I, and declining grooving is used for... | Vertical grooving is used for ore body I, and horizontal grooving is used for ore body II | general_qa | 255 |
The following is a multiple choice question (with answers).
===Question
To achieve an Ξ· of 1.7 for uranium, what should be the enrichment level of U-235 in uranium (E=0.0253 eV)?
===Choices
$$
N ( U 8 )=5 1. 6 N ( U 5 )
$$
$$
N ( U 8 )=5 4. 9 N ( U 5 )
$$
$$
N ( U 8 )=5 5. 8 N ( U 5 )
$$
$$
N ( U 8 )=6 0. 3 N ( U 5 )
... | $$
N ( U 8 )=5 4. 9 N ( U 5 )
$$ | general_qa | 285 |
The following is a multiple choice question (with answers).
===Question
Four rays, 1, 2, 3 and 4 are incident normally on the face PQ of an isosceles prism PQR with apex angles $ngle Q = 120^{\circ}$. The refractive indices of the material of the prism for the above rays 1,2, 3 and 4 are 1.85, 1.96, 2.05 and 2.15, res... | 3 and 4 only | general_qa | 204 |
The following is a multiple choice question (with answers).
===Question
An air compressor has an inlet pressure of \(1 \, \text{kg/m}^2\) and an inlet temperature of \(15^\circ \text{C}\). The air velocity is \(c_1 = 100 \, \text{m/s}\), \(200 \, \text{m/s}\), and \(400 \, \text{m/s}\), respectively. Assuming that the ... | 293 K, 1.061 kg/m^2; 308 K, 1.267 kg/m^2; 368 K, 2.37 kg/m^2 | general_qa | 623 |
The following is a multiple choice question (with answers).
===Question
Government has initiated the roll out of a Community based care programme for undernourished children under 6 years across the country through the Integrated Child Development Services (ICDS) scheme known as?
===Choices
Kayakalp
Ujjwala
BalwadiShi... | SnehaShivir | general_qa | 89 |
The following is a multiple choice question (with answers).
===Question
Which of the following can cause edema?
===Choices
Increased colloidal osmotic pressure in tissue fluid
Reduced capillary blood pressure
Increased plasma albumin
Elevated blood calcium concentration | Increased colloidal osmotic pressure in tissue fluid | general_qa | 55 |
The following is a multiple choice question (with answers).
===Question
When a perfectly competitive labor market is in equilibrium,
===Choices
individual firms face downward sloping labor demand curves
wages are dictated by the government
there is a surplus of jobs and a shortage of workers
everyone who wants to work... | everyone who wants to work has the opportunity to do so | general_qa | 132 |
The following is a multiple choice question (with answers).
===Question
"Who directed 'To Live'?"
===Choices
Jia Zhangke
Chen Kaige
Lou Ye
Zhang Ziyi
Yimou Zhang
John Woo
Tsui Hark
Ang Lee
Feng Xiaogang
Wong Kar-wai | Yimou Zhang | general_qa | 71 |
The following is a multiple choice question (with answers).
===Question
The position vector of a particle is given as $\vec{r} = (t^2 + 4t +6) \hat{i} +Β (t^2) \hat{j}.$ The time after which the velocity vector and acceleration vector becomes perpendicular to each other is equal to:
===Choices
0.8 sec
1.6 sec
1.5 sec
... | 1 sec | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Compute the integral:
$$
\int \frac{ \sin(x)^2 \cdot \cos(x) }{ \sin(x) + \cos(x) } \, dx
$$
===Choices
C + \frac{1}{4} \cdot \left(\ln\left(1 + \tan(x)\right) + \ln\left(\left|\cos(x)\right|\right)\right) - \frac{1}{4} \cdot \left(1 + \tan(x)\rig... | C + \frac{1}{4} \cdot \left(\ln\left(1 + \tan(x)\right) + \ln\left(\left|\cos(x)\right|\right)\right) - \frac{1}{4} \cdot \left(1 + \tan(x)\right) \cdot \left(\cos(x)\right)^2 | general_qa | 878 |
The following is a multiple choice question (with answers).
===Question
When did Ostankino Television and Radio Company cease broadcasting?
===Choices
1993
1996
1997
1990
1992
1995
1991
1999
1998
1994 | 1995 | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
Which of the following complexes exhibits the highest paramagnetic behaviour ? Where gly = glycine, en = ethylenediamine and bipy = bipyridyl
(At. nos. Ti = 22, V = 23, Fe = 26, Co = 27)
===Choices
$$[Co(OX)_3]^{-4}$$
$$[Cr(NH_3)_6]^{-3}$$
$$[Co(O... | $$[Co(OX)_3]^{-3}$$ | general_qa | 232 |
The following is a multiple choice question (with answers).
===Question
50 ml of 20.8% (w/V) $BaCl_2$ (aq) and 100 ml of 9.8% (w/V) $H_2SO_4$ (aq) solutions are mixed. Molarity of $Cl^-$ ions in the resulting solution is : (At mass of Ba =137)
===Choices
0.444 M
0.222 M
0.666 M
0.555 M
0.267 M
0.1 M
1.33 M
0.167 M
0.1... | 0.333 M | general_qa | 161 |
The following is a multiple choice question (with answers).
===Question
For a strontium salt solution labeled with Sr$^{89}$, the specific radioactivity is 2 mCi/ml. If 0.2 ml of the solution is used to prepare a sample and the counting efficiency is 0.1, how many times must the original solution be diluted to achieve ... | 89 times | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
An income fund would likely invest in which of the following securities?
I Common stocks;
II Preferred stocks;
III Debentures;
IV Income bonds.
===Choices
III and IV only
I and II only
II and I only
I and III only
I and IV only
II and III only
II ... | II and III only | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
Compute the integral:
$$
\int \frac{ 2 \cdot x+1 }{ (x-1) \cdot \sqrt{x^2-4 \cdot x+2} } \, dx
$$
===Choices
2\cdot\ln\left(\left|x-2+\sqrt{x^2-4\cdot x+2}\right|\right)-3\cdot\arcsin\left(\frac{x-1}{2\cdot\sqrt{2}}\right)+C
2\cdot\ln\left(\left|x... | 2\cdot\ln\left(\left|x-2+\sqrt{x^2-4\cdot x+2}\right|\right)-3\cdot\arcsin\left(\frac{x}{(x-1)\cdot\sqrt{2}}\right)+C | general_qa | 411 |
The following is a multiple choice question (with answers).
===Question
Suppose that $\Omega_1$ and $\Omega_2$ are two circles with radii $9$ and $16$ , respectively, and that they are externally tangent at $P$ . A common external tangent $\ell$ meets $\Omega_1$ at $X$ and $\Omega_2$ at $Y$ . $\overleftrightarrow{XP}$ ... | 195 | general_qa | 202 |
The following is a multiple choice question (with answers).
===Question
In his famous work 'Song of Ascending the Youzhou Platform', the early Tang poet Chen Zang laments: 'I see no ancient men before, nor any coming after. Thinking of the vast universe, I alone grieve and weep.' To which historical figure does the phr... | Yan Zhao Wang | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
Where was the world's earliest hand axe found?
===Choices
Great Rift Valley
Great Rift Valley, Olduvai Gorge
Great Rift Valley, Kenya
Olduvai Gorge
Great Rift Valley, Tanzania
Great Rift Valley, Olduvai Gorge, Tanzania
Great Rift Valley, Olduvai G... | Olduvai Gorge | general_qa | 108 |
The following is a multiple choice question (with answers).
===Question
The sound waves each of amplitude $\alpha$ and of frequency $500Hz$ and $512Hz$ superpose. Then the resultant of the amplitude of the resultant wave at $t=\frac {5}{48}s$ is
===Choices
$$\frac{a}{\sqrt{2}}$$
$$\frac{a\sqrt{3}}{\sqrt{2}}$$
$$\frac{... | $$\frac{a}{\sqrt{2}}$$ | general_qa | 183 |
The following is a multiple choice question (with answers).
===Question
On a topographic map with a scale of 1:10,000, two points A and B, the length between the two points measured on the map is 12mm, and the difference in elevation from point B to point A is known to be 10m, then what is the slope of the line BA?
==... | -8.3% | general_qa | 125 |
The following is a multiple choice question (with answers).
===Question
Under normal physiological conditions, if an increase in the ineffective chamber of the respiratory system will cause?
===Choices
Improved Breathing Efficiency
Oxygen concentration decreases
Gas exchange ceases
Respiratory Muscle Strengthening
Lun... | Increased respiratory rate | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
During which year of the International SΓ£o Paulo Biennial in Brazil was Kara Walker the United States representative?
===Choices
2000
2004
2009
2003
2002
2006
2001
2008
2007
2005 | 2002 | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
In Panda3D, the common base class and the access interface class that define the scene graph nodes are?
===Choices
PandaNode class and NodeManager class
Node class and NodePath class
Node class and PandaNode class
NodePath class and NodeManager cl... | PandaNode class and NodePath class | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
Rolling bearing bore code 01 indicates that the bearing bore diameter d = ( ) mm, and rolling bearing bore code 04 indicates that the bearing bore diameter d = ( ) mm.
===Choices
15;25
14;24
12;20
13;23
25;35
11;21
20;30
18;28
16;26
10;15 | 12;20 | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
The 19th National Congress report first expounded on the "three senses of people's livelihood" - gain, happiness, and security, reflecting profound changes in people's livelihood development ( )
===Choices
A profound change in the level of needs, ... | A profound change in the level of needs, from the material and spiritual levels to the psychological and emotional levels | general_qa | 263 |
The following is a multiple choice question (with answers).
===Question
Incompressible fluid flows into a rectangular channel with a width of $b$ and a height of $2h$ at a velocity of $u_{0}$ (where $b \gg a$), forming a velocity boundary layer from the inlet. It is known that the thickness of the boundary layer can be... | $$
R e={\frac{u_{0} h} {\nu}}
$$ | general_qa | 339 |
The following is a multiple choice question (with answers).
===Question
The bond length of the $^{12}C^{18}O$ molecule is $R_{0}=0.1128 \mathrm{nm}$.
If the Raman scattering of this molecule is measured, calculate the spacing between the small Raman shift spectral lines and the wavelength difference between the first a... | $$
22.08cm^{-1} or 22.10cm^{-1}
$$ | general_qa | 333 |
The following is a multiple choice question (with answers).
===Question
What is the ultimate goal of power system stability analysis?
===Choices
Request the generator rotor swing curve, and determine the stability of the system operation based on the swing curve.
Request the variation curve of the generator stator cur... | Request the generator rotor swing curve, and determine the stability of the system operation based on the swing curve. | general_qa | 235 |
The following is a multiple choice question (with answers).
===Question
What are the independent small houses set up in the gardens by Ming Dynasty literati for tea tasting called?
===Choices
Tea pavilion
Tea house
Tea bower
Tea studio
Tea arbor
Tea kiosk
Tea gazebo
Tea cottage
Tea chamber
Tea shed | Tea pavilion | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
Flight route Flight mainly includes (), (), ().
===Choices
Northern passage, southern passage, crosswise passage
Forward route, backward route, spiral route
Direct route, indirect route, circular route
Quick route, slow route, looping route
Fast t... | Direct route, indirect route, circular route | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
China has ___ of natural grassland, becoming the second largest grassland resource country in the world.
===Choices
589 million hm2
245 million hm2
322 million hm2
367 million hm2
500 million hm2
280 million hm2
392 million hm2
415 million hm2
420... | 392 million hm2 | general_qa | 106 |
The following is a multiple choice question (with answers).
===Question
In the main step of amalgamation method of gold extraction, what is the temperature for distilling mercury paste?
===Choices
600Β°C
750Β°C
850Β°C
650Β°C
900Β°C
550Β°C
950Β°C
700Β°C
800Β°C | 800Β°C | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
A sequence of polynomials is defined by the recursion $P_1(x) = x+1$ and
$$$P_{n}(x) = \frac{(P_{n-1}(x)+1)^5 - (P_{n-1}(-x)+1)^5}{2}$$$
for all $n \geq 2$ . Find the remainder when $P_{2022}(1)$ is divided by $1000$ .
===Choices
610
611
617
615
6... | 616 | general_qa | 155 |
The following is a multiple choice question (with answers).
===Question
The normalized direction function of a certain antenna is known to be $F ( \theta)=\left\{\begin{matrix} {{\operatorname{cos}^{2} \! \theta}} & {{| \theta| \leq\frac{\pi} {2}}} \\ {{0}} & {{| \theta| \geq\frac{\pi} {2}}} \\ \end{matrix} \right.$. T... | 10 | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
Assuming that the stiffness of the front axle suspension of a car is 10000N/m, the stiffness of the rear suspension is 11000N/m, the suspension mass distribution coefficient is 1, the distance between the center of mass and the front axle is 1.3m, ... | 22.06 | general_qa | 205 |
The following is a multiple choice question (with answers).
===Question
When a soldier asks for leave to go out, ____ is responsible for registering, checking the dress and appearance, explaining the precautions, and issuing a leave permit.
===Choices
Platoon sergeant
Company duty officer
Gate guard
Duty squad leader
... | Company duty officer | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
A chemist finds that 30.82 $\mathrm{g}$ of nitrogen will react with 17.60 $g,$ 35.20 $g,$ 70.40 $g,$ or 88.00 $g$ of oxygen to form four different compounds.
===Choices
1.0, 2.0, 4.0, 5.0
1.1, 2.2, 4.4, 5.5
1.0, 2.5, 4.0, 6.0
0.8, 2.5, 4.2, 5.2
0.... | 1.0, 2.0, 4.0, 5.0 | general_qa | 272 |
The following is a multiple choice question (with answers).
===Question
Intertrochanteric femoral fractures account for ___ of all fractures in adults.
===Choices
0.031
0.054
0.062
0.036
0.089
0.067
0.098
0.075
0.048
0.023 | 0.054 | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
In what year was the Society of Illustrators' first Annual Exhibition held?
===Choices
1954
1958
1960
1956
1955
1969
1953
1949
1959
1957 | 1959 | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
The starchiness (A) gene in corn seeds is dominant over the sugary gene (a). When a pure sugary corn's pistil receives starch-containing pollen, the genotype of the endosperm in the seeds it produces is ___.
===Choices
AA
Aa
AAa
aaa
AAA
aaaa
AAaa
... | Aaa | general_qa | 92 |
The following is a multiple choice question (with answers).
===Question
Conditions for one-stage fracture healing proposed by Danis include ____.
===Choices
Exact realignment, forceful constriction of split areas
Proper alignment, adhesive bonding of fracture points
Correct reproduction, tensile holding of separated p... | Anatomic repositioning, compression fixation of severed ends | general_qa | 140 |
The following is a multiple choice question (with answers).
===Question
The preparation process of the injection is ().
===Choices
Preparation of active ingredients β preparation β mixing β sterilization β quality control β packaging
Preparation of raw materials β compounding β refrigeration β potting β sterilization ... | Preparation of raw materials β preparation β filtration β potting β sterilization β quality check | general_qa | 212 |
The following is a multiple choice question (with answers).
===Question
The file structure that stores the newly inserted record at the end of the file and distributes the records randomly in the physical storage space of the files are ( ).
===Choices
Hash files
Queue files
Linked files
Aggregate files
Batch files
Ind... | Stack files | general_qa | 77 |
The following is a multiple choice question (with answers).
===Question
Party A voluntarily took a neighbor's 5-year-old child into the mountains to hunt. The two got separated in the forest, and Party A continued hunting alone without searching for the child or returning to the village to inform the child's family. In... | Intentional homicide | general_qa | 145 |
The following is a multiple choice question (with answers).
===Question
Given the determinant [left| {begin{array}{*{20}{c}}1&2&3{-1}&x&00&x&1end{array}} right|], the minor of element -1, `M_{21} = `, and the cofactor of element 2, `A_{12} = `, are respectively equal to ( )
===Choices
[left| {begin{array}{*{20}{c}}2&3... | [left| {begin{array}{*{20}{c}}2&3x&1end{array}} right|, {( - 1)^{1 + 2}}left| {begin{array}{*{20}{c}}{-1}&00&1end{array}} right|] | general_qa | 755 |
The following is a multiple choice question (with answers).
===Question
The average energy loss rate of an ultra-relativistic $\mu$ meson when passing through $x \ \mathrm{g m} \cdot \mathrm{c m}^{-2}$ in material is given by the formula $\mathrm{d} E / \mathrm{d} x = a + b E$, where $a = 2.5 \ \mathrm{MeV \cdot gm^{-1... | 2.4km | general_qa | 244 |
The following is a multiple choice question (with answers).
===Question
A proton is observed to have a momentum of 5 $MeV/c$. Compute its kinetic energy in MeV.
===Choices
12.9 \text{ keV}
12.3 \text{ keV}
$12.5 \text{ keV}$
$11 \text{ keV}$
$12 \text{ keV}$
$14 \text{ keV}$
$15 \text{ keV}$
12.1 \text{ keV}
$13 \text... | $13 \text{ keV}$ | general_qa | 143 |
The following is a multiple choice question (with answers).
===Question
As of 2013, share of people in the India who think political parties are corrupt is
===Choices
76%
26%
86%
10%
46%
66%
50%
90%
30%
70% | 86% | general_qa | 69 |
The following is a multiple choice question (with answers).
===Question
Someone's red blood cells agglutinate with the serum of type B blood, while their serum does not agglutinate with the red blood cells of type B. Analyze this person's blood type as ( ).
===Choices
Type A
Rh positive
Type B
AB type
Type O Rh negati... | AB type | general_qa | 101 |
The following is a multiple choice question (with answers).
===Question
A patient, Wang XX, was admitted to the hospital with the chief complaint of "fever and headache for 4 days." Physical examination: pharyngeal redness, no enlargement of tonsils, scattered petechiae on the soft palate, and erythema on the neck and ... | Dengue fever | general_qa | 239 |
The following is a multiple choice question (with answers).
===Question
When estimating the unknown parameter ΞΈ, given an unbiased estimator x of ΞΈ and a sufficient statistic T, if y represents the conditional mean of x given T, which of the following statements are correct?
===Choices
y follows a Gaussian distributio... | y is a usable estimator of ΞΈ | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
What is the relation between specific volume and density?
===Choices
Exponential relationship
Sigmoidal connection
Direct correlation
Proportional relationship
Quadratic relationship
Cubic relationship
Linear correlation
Multiplicative dependency
... | Reciprocal relationship | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
MHC Class II molecular chains and chain assembly and folding and dimer formation are facilitated by ().
===Choices
Calmodulin
HLA-DM
Calreticulin
TAP transporters
HLA-DO
Protein disulfide isomerase
Chaperonins
Ii
Beta2-microglobulin
CLIP | Ii | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
What is the function of the CXU 4A/B spotting charge?
===Choices
It is utilized to improve aerodynamic stability of practice bomb BDU 45/B in air
It marks the impact point using smoke and sound for easy nighttime identification
It is used to incre... | It is used with practice bomb BDU 45/B to provide a day time visual indication of bomb impact point and fuze function | general_qa | 219 |
The following is a multiple choice question (with answers).
===Question
Using a chromatographic column to separate components $\mathbf{A}$ and $\mathbf{B}$, the retention times for peak A and peak B are 320s and 350s, respectively, with a dead time of 25s. If the peak widths are equal, what is the minimum length of the... | $$
479(cm)
$$ | general_qa | 203 |
The following is a multiple choice question (with answers).
===Question
Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements:
$$
2 \, \mathrm{N a N}_{3} ( s ) \, \longrightarrow\, 2 \, \mathrm{N a} ( s ) \,+\, 3 \, \mathrm{N}_{2} ( g )
$$
How many grams of NaN3 are required ... | $$
5 2 5 \mathrm{g N a N}_{3}
$$ | general_qa | 341 |
The following is a multiple choice question (with answers).
===Question
Below what specific activity level (Bq/kg) can radioactive waste be considered as non-radioactive waste?
===Choices
8.9 Γ 10^4
7.4 \times 10^4
5.2 Γ 10^4
4.8 Γ 10^4
6.1 Γ 10^4
3.7 \times 10^5
3.7 \times 10^4
3.7 \times 10^6
9.3 Γ 10^4
7.4 \times 1... | 7.4 \times 10^4 | general_qa | 142 |
The following is a multiple choice question (with answers).
===Question
For the treatment of asthma with exterior cold and interior fluid retention, the preferred formula is:
===Choices
Gan Jiang Ling Shu Tang
Xiao Qing Long Tang without Shi Gao
Xiao Qing Long Tang with additional Ma Huang
Ban Xia Hou Pu Tang
Hua Gai ... | Xiao Qing Long Tang | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
Use the conventional Ward equivalent method to equivalize the local system, with the external system being equivalized as( ).
===Choices
Interaction among boundary nodes
A radial simple network
A multi-port network
Boundary node interactions and s... | Connections between boundary nodes and the injection power of boundary nodes | general_qa | 118 |
The following is a multiple choice question (with answers).
===Question
In which cipher each letter of the plaintext is substituted by any other letter to form the cipher message?
===Choices
Rail fence cipher
Transposition cipher
Caesar cipher
AES encryption
DES encryption
Shift cipher
Playfair cipher
Atbash cipher
Bl... | Shift cipher | general_qa | 71 |
The following is a multiple choice question (with answers).
===Question
A 51-year-old man presents to his dermatologist because of severe stomatitis and superficial skin erosions over his trunk. His condition started 2 months ago and was unresponsive to oral antibiotics and antiherpetic medications. He has no history o... | Anti-desmoglein-3 antibodies | general_qa | 223 |
The following is a multiple choice question (with answers).
===Question
Compute the integral:
$$
\int \frac{ 1 }{ (x-3) \cdot \sqrt{10 \cdot x-24-x^2} } \, dx
$$
===Choices
-\frac{2}{\sqrt{3}}\cdot\arctan\left(\frac{\sqrt{-x^2+10\cdot x-24}}{\sqrt{3}\cdot x-6\cdot\sqrt{3}}\right)+C
-\frac{2}{\sqrt{3}}\cdot\arctan\left... | -\frac{2}{\sqrt{3}}\cdot\arctan\left(\frac{\sqrt{-x^2+10\cdot x-24}}{\sqrt{3}\cdot x-4\cdot\sqrt{3}}\right)+C | general_qa | 630 |
The following is a multiple choice question (with answers).
===Question
In the Millikan oil-drop experiment, the charge is measured by balancing electric force and gravitational force on an oil droplet. The electric field is produced by two charged parallel plates. During the experiment, an oil droplet with radius r an... | 4e | general_qa | 159 |
The following is a multiple choice question (with answers).
===Question
The pressure in a bulb dropped from 2000 to 1500 mm Hg in 47 min when the contained oxygen leaked through a small hole. The bulb was then evacuated. A mixture of oxygen and another gas of molecular weight 79 in the molar ratio of 1:1 at a total pre... | $$\displaystyle \frac{M_{gas}}{M_{O_2}}=1.236$$ | general_qa | 370 |
The following is a multiple choice question (with answers).
===Question
Let $A$be a third-order matrix, $\alpha_{1}, \alpha_{2}$ be the eigenvectors of $A$ belonging to the eigenvalues $- 1, 1$ , and vector $\alpha_{3}$ satisfy $A \alpha_{\frac{1} {3}}=\alpha_{\frac{1} {2}}+\alpha_{\frac{1} {3}}$ . Let $P=( \alpha_{1},... | $$
P^{-1} A P=\left( \begin{matrix} {{{-1}}} & {{{0}}} & {{{0}}} \\ {{{0}}} & {{{1}}} & {{{1}}} \\ {{{0}}} & {{{0}}} & {{{1}}} \\ \end{matrix} \right)
$$ | general_qa | 771 |
The following is a multiple choice question (with answers).
===Question
Which RC5 mode will have the ciphertext longer than the plaintext by at most the size of a single RC5 block?
===Choices
RC5 block cipher
RC5-Cipher Block Chaining
RC5-Cipher Block Padding
RC5-Cipher Feedback Mode
RC5-Output Feedback Mode
RC5-Authe... | RC5-Cipher Block Chaining Pad | general_qa | 113 |
The following is a multiple choice question (with answers).
===Question
In what year did Edward Baker Jelks earn a Ph.D. in archaeology?
===Choices
1964
1969
1960
1968
1965
1967
1963
1962
1966
1961 | 1965 | general_qa | 84 |
The following is a multiple choice question (with answers).
===Question
The height of a vertical dipole antenna is $h = 10 \, \mathrm{m}$. When the operating wavelength is $\lambda = 300 \, \mathrm{m}$, determine its effective height and the radiation resistance attributed to the antinode current.
===Choices
$$
R_{r} ... | $$
R_{r} \approx0. 0 1 9 \ \Omega
$$ | general_qa | 294 |
The following is a multiple choice question (with answers).
===Question
In which year was the International Centre for Genetic Engineering and Biotechnology (ICGEB) established?
===Choices
1983
1989
1985
1981
1980
1982
1986
1988
1984
1987 | 1983 | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
When the steam initial temperature and initial pressure remain unchanged, the exhaust pressure increases, the cycle thermal efficiency (), the exhaust pressure decreases, and the cycle thermal efficiency ().
===Choices
Remain stable, increase
Decr... | Reduce, improve | general_qa | 103 |
The following is a multiple choice question (with answers).
===Question
In the following concepts regarding the in agricultral machinery, which of the following statements are correct? (Need to include all correct options):
(1). Typically, NIRS on-line systems employ either a partial or full transmission system (light ... | (1) and (2) | general_qa | 421 |
The following is a multiple choice question (with answers).
===Question
A boat travels directly upstream in a river, moving with constant but unknown speed v with respect to the water. At the start of this trip upstream, a bottle is dropped over the side. After 15 minutes the boat turns around and heads downstream. It ... | 2 miles per hour | general_qa | 172 |
The following is a multiple choice question (with answers).
===Question
Where was singer Ivan Rebroff's father born?
===Choices
Leipzig.
Liebenwerda.
Bremen.
Liegnitz.
Berlin.
Magdeburg.
Dresden. | Liebenwerda. | general_qa | 52 |
The following is a multiple choice question (with answers).
===Question
An electric fieldΒ $\overline EΒ = 50\widehat i + 75\widehat jN/C$ exists in a certain region of space. Presuming the potential at the origin to be zero, the potential at point P(1m,2m) will be
===Choices
50 V
-50 V
-150 V
100 V
175 V
-200 V
150 V
... | 100 V | general_qa | 130 |
The following is a multiple choice question (with answers).
===Question
How much standard arsenic solution is added to the control tube for the determination of arsenic salt limits by the Guzai method?
===Choices
10ml
4ml
7ml
0.5ml
1ml
3ml
8ml
6ml
2ml
5ml | 2ml | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
Red-green color blindness is caused by an X-linked recessive single gene. Assuming that out of 50,000 people, 320 women have red-green color blindness, and further assuming random mating, what is the probability of red-green color blindness among m... | 0.08 | general_qa | 126 |
The following is a multiple choice question (with answers).
===Question
which is the class of fold with the degree of curvature greater on the outer arc compared to the inner arc?
===Choices
Class 1
Class 5
Class 7
Class 3
Class 8
Class 6
Class 2
Class 0
Class 4
Class 9 | Class 3 | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
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
===Choices
(2)(3)
(2)(4)
(2)(3)(4)
(1)(2)(4)
(1)(3)(5)
(1)(4)... | (1)(3)(5) | general_qa | 129 |
The following is a multiple choice question (with answers).
===Question
Given $\triangle ABC$ and $D$ a point on side $AC$ such that $AB=DC, \angle{DBC}=(5x)^\circ, \angle{ABD}=(60-2x)^\circ$ , and $\angle{ACB}=(3x)^\circ$ find $x$ .
===Choices
19
10
11
16
15
17
18
12
14
13 | 12 | general_qa | 117 |
The following is a multiple choice question (with answers).
===Question
Girl, 1 year old. Enlarged head, intellectual disability. CT shows enlargement of the fourth ventricle and cisterna magna, with dysplasia of the cerebellar vermis and hemispheres. Supratentorial ventricles are also enlarged. The most likely diagnos... | Dandy-Walker Syndrome | general_qa | 140 |
The following is a multiple choice question (with answers).
===Question
What is the method for olfaction examination?
===Choices
Wave a sheet of paper to direct the odors emitted by the patient towards your nose, and then gently examine the scent attributes and type.
Use your hand to fan the odors emitted by the patie... | Use your hand to fan the odors emitted by the patient towards your nose, and then carefully assess the characteristics and nature of the smell. | general_qa | 305 |
The following is a multiple choice question (with answers).
===Question
Under normal circumstances, if the price of transport services decreases, the demand for transport will be (), otherwise (), that is, transport demand and freight are () change, which is the general law of transport demand.
===Choices
Decrease, in... | Increase, decrease, reverse direction | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
The magnetic moment of atoms and molecules is generally on the order of a Bohr magneton $\mu_{\mathrm{B}} = \frac{e \hbar}{2 m} = 9.274 \times 10^{-24} \, \mathrm{A} \cdot \mathrm{m}^{2}$. In an external magnetic field with a magnetic flux density ... | $45$ | general_qa | 199 |
The following is a multiple choice question (with answers).
===Question
A certain type of oil flows past a heated flat plate surface at a uniform velocity of 1 m/s. The uniform temperature of the oil is 293 K, and the surface of the plate is maintained at 353 K. Assuming the critical Reynolds number $R e_{x_{c}}=5 \tim... | $$
= 1 0 8 8 5. 9 5 \mathrm{~ K / m}
$$ | general_qa | 497 |
The following is a multiple choice question (with answers).
===Question
Which of the following is a commonly used heavy medium in dense medium separation?
===Choices
Hematite sand
Water
Silica powder
Silt powder
Magnetite powder
Magnetite concentrate
Hematite powder
Iron oxide powder
Barite powder
Iron ore powder | Magnetite powder | general_qa | 73 |
The following is a multiple choice question (with answers).
===Question
What is the maximum passenger capacity of the Tu-334 airliner?
===Choices
108
107
103
106
109
100
102
105
104
101 | 102 | general_qa | 72 |
The following is a multiple choice question (with answers).
===Question
Regarding personal dose limits, which of the following statements is correct(Choose the option that includes all the correct statements):
I. Public dose limits do not include natural radiation exposure doses
II. Occupational dose limits do not incl... | I, II, III, IV | general_qa | 166 |
The following is a multiple choice question (with answers).
===Question
Concepts such as ____ put forward by Marx and Engels and the idea of transforming the natural world through practice have become the ideological source of the artificial view of nature.
===Choices
Anthropomorphize the natural world, the natural wo... | Anthropomorphize the natural world, the natural world of human reality | general_qa | 180 |
The following is a multiple choice question (with answers).
===Question
When using electric lighting for small well excavation, the electric lamp voltage should not exceed ().
===Choices
30V
50V
60V
24V
12V
64V
72V
46V
36V
48V | 36V | general_qa | 74 |
The following is a multiple choice question (with answers).
===Question
What's the fundamental purpose of the powers launching the Second Opium War?
===Choices
Promote Western culture in China
Establish a naval base in China
Set up an embassy in Beijing
Force China to adopt Western technology
Re-edit the New Treaty
Ex... | Expand the Chinese market | general_qa | 93 |
The following is a multiple choice question (with answers).
===Question
We now define an algorithm: The definition of a(n) is: Triangle in which first row is 0, n-th row (n>1) lists the exponents of distinct prime factors ("ordered prime signature") in the prime factorization of n. For example, the prime factorization ... | [1, 1, 1, 1, 1, 1, 1, 3, 2, 1] | general_qa | 471 |
The following is a multiple choice question (with answers).
===Question
Yeast undergoes budding, and the modes of budding can include ( ).
===Choices
Single-point budding, Double-point budding, Triple-point budding, Multi-point budding
Single-level budding, Double-level budding, Triple-level budding, Multi-level buddi... | Single-sided budding, Double-sided budding, Triple-sided budding, Multi-sided budding | general_qa | 191 |
The following is a multiple choice question (with answers).
===Question
When the circuit breaker recloses on a permanent fault, the relay protection trips the circuit breaker again to isolate the fault, the impact brought about by this process is( ).
===Choices
Factors Affecting the Reliability of Relay Protection Ope... | Factors Affecting the Reliability of Relay Protection Operation | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
2 gm iron pyrite $(FeS_2)$ is burnt with $O_2$ to form $Fe_2O_3$ and $SO_2$ the mass of $SO_2$ produced is
(Fe=56, S=32, O=16)
===Choices
2.03 gm
4.26 gm
4 gm
2.26 gm
2.36 gm
2.13 gm
2 gm
2.53 gm
2.06 gm
2.46 gm | 2 gm | general_qa | 132 |
The following is a multiple choice question (with answers).
===Question
Calculate the solvent strength factor for methanol-acetonitrile-water (60:10:30) in reversed-phase chromatography. If tetrahydrofuran-methanol-water is used instead, with the water content unchanged, what should the proportion of methanol be to mai... | 0.687 | general_qa | 141 |
The following is a multiple choice question (with answers).
===Question
Thirty minutes after surgical nasal polyp removal for refractory rhinitis, a 40-year-old man has retrosternal chest tightness and shortness of breath in the post-anesthesia care unit. The surgical course was uncomplicated and the patient was succes... | Pseudoallergic reaction | general_qa | 315 |
The following is a multiple choice question (with answers).
===Question
Consider the set $\{1,2,\dots,z\}$ and all its nonempty subsets, which we'll denote as $L_1, L_2, \dots, L_{2^z-1}$ in any arbitrary order. Now, construct a matrix $W$ of size $(2^z-1) \times (2^z-1)$ where each element $m_{ij}$ is defined as follo... | 0 | general_qa | 222 |
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