Common sense problems in natural science examination

1. Q: Natural science topics, multiple-choice questions in natural science, 100 people.

1. Among the common compounds, () A, aluminum B, chlorine C, magnesium D, oxygen 2 and pig iron have the greatest changes in valence. After reacting with enough dilute sulfuric acid, the solid residues are mainly () A, iron B, ferrous sulfate C, wrought iron D and carbon 3. The pH of some body fluids in the human body is measured in this way, among which () is the most acidic.

35~7。 45 B, saliva: 6.

6~7。 1c, gastric juice: 0.

9~ 1。 5 D, milk: 6.

6~7。 64, scientists from the organic reaction: RH Cl? Inspired by light-→ RCL (liquid) HCl (gas), it is proposed that by-product hydrochloric acid can be obtained in pesticide organic synthesis industry.

It is pointed out that the best methods to separate hydrochloric acid from the above reactions are (a), distillation b, adsorption c by activated carbon, separation d by water washing (steam) and sublimation 5. When frogs hibernate, the main respiratory organs are () A, vein B, capillary C, gill D and skin 6. Wolves used to be a common animal in the western United States, but they were killed in large numbers in the early 20 th century because of farm safety problems. 1996, the United States reintroduced wolves from Europe and released them in the wilderness.

This is mainly for (a) developing sightseeing, attracting tourists, making the local ecosystem healthier, and (c) preying on animals harmful to agricultural production and preventing grassland rodents. When the flood receded, farmers "washed their seedlings" and washed away the sediment on the crops.

This is mainly for (a) preventing crops from lodging under heavy pressure; (b) removing pollutants brought by floods; (c) ensuring unobstructed stomata; and (d) enhancing illumination. The "tendons" in dry sugarcane are () A, phloem B, xylem C, vascular bundle D and cambium 9. In a room with a temperature of 20℃, measure the temperature of boiling water with a mercury thermometer. When the mercury column passes "20". The pointer of the thermometer indicates () a, the temperature of air in the room b, the temperature of boiling water c, and the temperature of mercury in the thermometer d, and there is nothing 1 1. The three light bulbs are marked with "3V, 1" respectively. 5W ","6V, 6W "and" 12V, 24W "have the same luminous brightness if connected to a circuit with a power supply voltage greater than 3V, and will not burn out (regardless of the influence of temperature on resistance). Then the connection modes of these three lamps in the circuit are () A, series B, parallel C, series or parallel D, other modes 12, and the number of protons contained in graphite and football olefin (chemical formula C60) with the same mass () A, the former is greater than B, equal to C, and the latter is greater than D, so it is impossible to determine 13. Zinc, copper oxide and football olefin are used in the laboratory. There are two ways as follows: (1), (2) If the quality of copper produced by these two methods is equal, the following statement is consistent with the experimental results: a. Consume the same quality of copper oxide B, zinc C and dilute sulfuric acid D, and produce the same quality of zinc sulfate 14. If you put a tourniquet on your upper arm, the blood vessels in your forearm will swell. The protuberant blood vessels and the structures that make the blood vessels protuberant are () A, artery, arterial valve A, vein, venous valve A, artery, venous valve D, vein and arterial valve 15 respectively. In order to study the influence of sunlight on soybean germination, a classmate planted soybean seeds in two identical flowerpots and designed the following experiment.

The mistake that should be corrected in this experimental design is the lighting conditions of two flowerpots (). The temperature of water A is 20℃ in sunny place and 20℃ in dark place, so A is not enough. Both flowerpots should be placed in a sunny place, B should be fully watered, and the temperature should be 0℃ D, and neither should be watered. In modern medicine, there is a new technology to correct myopia, that is, the cornea of myopia patients is properly cut by laser to correct it. The purpose of this corneal ablation is (a) to shorten the focal length b of the eyeball detachment system, change the state c of the convex lens, reduce the light entering the eyeball, and enhance the ability of 265,438+0 to adjust the lens. The following statement is correct: (a) When two substances with the same mass absorb heat, the temperature change with large specific heat must be small, and the heat of 1 joule can be 65438+.

2 C when the mechanical energy of an object increases, the thermal energy will also increase. D. When the temperature of the saw blade rises, we can't judge the method of increasing heat energy. 22. When the resistor R 1 and R2 are connected in series, the total resistance is 20 ohms. Then the total parallel resistance is () a, which must be less than 5ωB, greater than 5ω and less than 10ωC, less than or equal to 5ωD and greater than 10ω23. Two identical beakers, A and B, are filled with two liquids with different densities. The mass of the two liquids in Cup A is half, and the volume of the two liquids in Cup B is half. The densities of the two liquids are ρ 1 and ρ2, ρ 1m d, respectively, which cannot be determined. 24. If the magnesium sulfate solution containing sulfuric acid is neutralized to neutrality and there is no indicator, you can choose () A, ammonia B, sodium hydroxide C, magnesium bar D and magnesium sulfate 25. The experimental facts that can prove that molecules in chemical reactions can be subdivided are (a) dropping red ink into clear water B, making distilled water C from tap water, separating liquid air to obtain oxygen and hydrogen D, and electrolyzing water to obtain oxygen and hydrogen 26. As early as the 10 century, Chinese doctors were observing some smallpox with mild symptoms.

So he dried the smallpox scab formed when smallpox patients recovered and attenuated it, ground it into powder, and blew this powder into the noses of healthy people to make them gain resistance to smallpox, which is called "human pox". The scab here and this method belong to the mixture of () A, antigen, specific immunity B, antigen, artificial immunity C, antibody, artificial immunity D, antibody, specific immunity 27, and a certain mass of K2O and Na2O can completely react with its sulfuric acid solution with 5 times mass, so the mass fraction of sulfuric acid solution () A is greater than 20.

86% B, greater than 3 1. 62%C, greater than 20.

86% and less than 3 1. 62% D, unable to determine 1.

B 2 .D 3 .

C 4 explosive. C 5

D 6 .B 7 .

C 8 .C 9 .

C 1 1 .A 12 .

B 13 .A 14 .

B 15 .B 16 .

A 2 1 .d.22.

C 23. A 24.

C 25. d 26.

B 27.c.

2. What questions do liberal arts students take in the natural science knowledge contest?

Liberal arts is also called humanities and social sciences.

As the name implies, liberal arts in a broad sense is a discipline that takes politics, economy and culture unique to human society as its research object. Language is a material existence form in which words express, record and transmit oral or written information; Chinese is a conscious content that describes facts, quotes thoughts, states thoughts, expresses will, expresses feelings, and transforms things and thoughts.

Politics is a social science discipline that mainly studies political behavior, political system and political related fields. In the west, political science research in academic field is also called political research, or just the word politics.

Politics refers to the field of academic research, while political research represents a wider field of research. History, or simply history, refers to the systematic recording, interpretation and study of past events and behaviors of human society.

History can provide modern people with an understanding of the past and serve as a reference for future actions. Together with ethics, philosophy and art, it is an important achievement of human spiritual civilization.

3. What are the specific contents of Class C of natural science in public institutions?

1, Reading Comprehension: Being able to master the data, facts and opinions in natural science literature and fully and accurately understand the meaning of the material.

2. Logical thinking: Being able to use logical methods to analyze, judge, reason and demonstrate phenomena, data, problems and opinions in the natural science field. 3. Data processing: able to identify, collect, analyze and evaluate information and data by scientific methods, and solve practical problems by using data processing results.

4. Written expression: able to use words, data, charts, etc. It is necessary to accurately and clearly state opinions, demonstrate opinions and express ideas. Extended data:

Examination interview of public institutions: Candidates who have achieved written test scores will be selected according to the recruitment plan and positions, from high scores to low scores.

The recruitment plan will be cancelled for positions with vacancies in the number of qualified written tests; Those who fail to reach the required recruitment ratio shall be determined according to the actual qualified number. After the interviewer is confirmed, the employer will post it and inform me.

After the interview, the total test scores of candidates are calculated according to the written test scores and interview results. The written test scores, interview scores and total test scores are calculated to two decimal places, and the mantissa is rounded off.