On January 29th, the public *** daily practice: common sense judgment (question book).
1.2019 is a super year for China's aerospace industry, and the achievements made in this year do not include:
a.Chang'e-4 landed on the far side of the moon.
b.The Long March 11 rocket was launched on an offshore platform for the first time in China.
c.The Long March-3 carrier rocket launched the 54th Beidou satellite.
d.China's strongest Long March 5 Yao-3 "Fat 5" was launched.
2.The following foods can be initially digested by the human mouth:
a.Beef and fish.
b.Eggs and milk.
c.Greens and crabs.
d.Rice and steamed buns.
3.At the end of the Western Han Dynasty, the "incense burner in the incense burner" invented by Ding Slow is the earliest known flat bracket in the world, its structure is exquisite, when using the burning charcoal fire into the brazier in the center of the incense burner, no matter how the incense burner rolls, the brazier in the center of the incense burner can be kept horizontal, and the charcoal fire will never fall out. The following devices are based on the same physical principle:
a.Compass BGyroscope.
c.Level dAltimeter.
4.During the transport of concrete mixer trucks from the pumping station to the construction site, their tanks must be kept at a low speed at all times. The following statements about the purpose of this operation are incorrect:
a.Accelerates concrete set.
b.Promote the concrete to be thoroughly mixed.
c.Prevent segregation of concrete.
d.Ensure that the concrete performance meets the construction requirements.
5.Auxin plays an important role in the process of cell differentiation, fruit development, rooting of cuttings and defoliation, among which the role of auxin is dual: it can promote growth and inhibit growth. In the following descriptions, the ones that belong to inhibition of growth are:
a.Female flowers form bThe blades are enlarged.
c.Wound healing dThe fruit falls off.
On January 29th, the public *** daily practice: common sense judgment (analysis).
1.c。This question tests the general knowledge of science and technology.
On January 3, 2019, the Chang'e-4 probe successfully landed on the far side of the Moon, which is also the first time that humans have landed on the far side of the Moon so far.
On June 5, 2019, the Long March 11 rocket was launched in the Yellow Sea of China, and successfully put into orbit a total of 7 satellites, including the Zhufeng-1A B satellite, the China Power Grid Tong-1A B satellite, the Jilin-1 Gaofen-03A satellite, the Tianqi-3 satellite and the Xiaoxiang-1 04 satellite. This launch fills the gap of China's launch vehicle sea launch and provides a new launch mode for China's rapid entry into space.
On March 9, 2020, China successfully launched the 54th navigation satellite of the Beidou system with the Long March-3B carrier rocket at the Xichang Satellite Launch Center. The satellite has successfully entered the predetermined orbit, and will be followed by orbit change, in-orbit testing, test evaluation, and timely access to the network to provide services.
Item D is correct, "Fat Five" specifically refers to China's Long March 5 series of carrier rockets, which is China's largest thrust large carrier rocket, with a carrying capacity of 25 tons in low earth orbit and 14 tons in geosynchronous transfer orbit. On December 27, 2019, the Long March 5 Yao-3 carrier rocket ignited and took off from the Wenchang Satellite Launch Center, successfully launching the Shijian-20 satellite into the scheduled orbit.
This question is a non-optional question, so the correct answer is C.
2.d。This question tests the general knowledge of science and technology.
Item A is wrong, beef and fish meat contain a lot of protein and a small amount of fat, and there are no proteases and lipases in the mouth, so the preliminary digestion of beef and fish cannot be completed. The digestion of protein begins in the stomach, after the protein enters the stomach, it enters the small intestine after preliminary digestion under the action of pepsin in the gastric juice, and the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest proteins, and under the action of these enzymes, the protein is thoroughly digested into amino acids and absorbed and utilized by the human body; The digestion of fats is mainly carried out in the small intestine, where bile (which does not contain any digestive enzymes) emulsifies fat particles into fat particles, and then is completely broken down into glycerol and fatty acids under the action of lipases in intestinal and pancreatic juices.
Item B is false, the main ingredient of eggs and milk is protein, which completes the initial digestion in the stomach.
Item C is false, green vegetables contain a lot of cellulose, but because the human body lacks enzymes to break down cellulose, the main components of green vegetables cannot be digested and absorbed by the human body; The main components of crab meat are protein and fat, the protein completes the initial digestion in the stomach, and the fat completes the initial digestion in the small intestine.
Item D is correct, the main ingredient of rice and steamed bread is starch, and the mouth contains salivary amylase, which can preliminarily decompose starch into maltose, so rice and steamed bread can be initially digested in the mouth.
Therefore, the correct answer is d.
3.b。This question tests the general knowledge of science and technology.
The "incense burner" is based on the mechanical principle of conservation of angular momentum, and the law of conservation of angular momentum reflects the general law of the movement of particles and particle systems around a point or an axis; It reflects the general law that the resultant moment of a fixed point (or fixed axis) is always equal to zero and the particle is the general law of the movement of the particle around the point (or axis) that is not acted on by an external force or is subjected to an external force.
Item A is wrong, the compass uses the characteristics of magnets to "repel the same sex and attract the opposite sex", which is different from the principle of "being incense burner" in the stem.
Item B is correct, the gyroscope is designed based on the theory of conservation of angular momentum, mainly composed of a rotor located in the center of the axis and can rotate, once it begins to rotate, due to the angular momentum of the rotor, the gyroscope has a tendency to resist the change of direction, which is the same as the principle of the stem "being in the incense burner".
Item C is wrong, the level uses the principle that the direction of gravity is always straight downward, which is different from the principle of "being burned in the incense burner".
D item error, the common altimeter is mainly a barometric altimeter, the use of the air pressure difference to obtain the height difference, in the range of 3000m, every 12m rise, the atmospheric pressure decreases by 1mmHg, and the question stem "incense burner" principle is different.
Therefore, the correct answer is b.
4.a。This question tests the general knowledge of science and technology.
Item A is wrong, item B is correct, the tank body of the concrete mixer truck keeps rotating at low speed at all times, which can prevent the concrete from agglomerating during transportation, so that the sand, stone and cement in the concrete are fully mixed and mixed more evenly.
C and D are correct, the segregation of concrete refers to the phenomenon that the cohesion between the constituent materials of the concrete mixture is not enough to resist the sinking of the coarse aggregate, and the components of the concrete mixture are separated from each other, resulting in uneven internal composition and structure. During transportation, the tank body of the concrete mixer truck rotates at a low speed at all times, which can prevent the segregation of concrete and ensure that the concrete performance meets the construction requirements.
This question is a non-optional question, so the correct answer is A.
5.d。This question tests the general knowledge of science and technology.
Auxin is a hormone that regulates the direction of plant growth produced by the cell area with ** and enlarged activity. The main role of auxin is to relax the plant cell wall, so that the cell grows, in many plants can also increase the synthesis of RNA and protein, regulate plant growth, especially can stimulate the longitudinal growth of cells in the stem and inhibit the lateral growth of cells in the root.
Item A is wrong, female flower formation is the growth process of cells, which belongs to promoting growth.
Item B is wrong, leaf enlargement is the growth process of the cell, which belongs to promoting growth.
Item C is false, wound healing is the growth process of cells, which belongs to promoting growth.
Item D is correct, fruit shedding is the process of stopping the growth of cells, which belongs to inhibited growth.
Therefore, the correct answer is d.