1. Any truth has been tested by practice, and anything that cannot stand the test of practice is not truth. From this we can infer ().
A. no truth can stand the test of practice.
B. some truths can't stand the test of practice.
C. not all truths can stand the test of practice.
D. Everything that has been tested by practice is truth.
2. "It is impossible to avoid all mistakes." Which of the following assertions is most similar to this assertion? ()
A. possible mistakes are inevitable
B.maybe all mistakes are unavoidable.
C. Possible mistakes can be avoided
D. Inevitable mistakes are inevitable
Wang Ruiping is an expert in computer programming and Wei Xin is a mathematician. In fact, all computer programming experts are mathematicians. As we know, most comprehensive universities in China are now training computer programming experts. On this basis, we can think that ().
A. Wang Ruiping was trained by a comprehensive university.
B. Most computer programming experts are trained by comprehensive universities.
C Wei Xin didn't graduate from a comprehensive university.
D. Some mathematicians are computer programming experts.
4. In the following set of logical reasoning, the correct one is ().
A Not all compounds contain carbon, but all organic compounds contain carbon, so some compounds are not organic.
B. Lawyers should learn the law well, and economic workers are not legal workers, so economic workers should not learn the law well.
C many employees of a certain unit are swimmers, and Li Jian is an employee of the unit, so Li Jian is a swimmer.
D any correct thought comes from practice, and this theory comes from practice. So the correctness of this theory is beyond doubt.
The oil production and export of an oil-producing country are seriously affected, and the international oil price fluctuates accordingly. At present, the situation in this country has been brought under control. Therefore, experts predict that the international oil futures price will drop sharply in the near future. Among the following options, the one that can weaken the above argument is ().
A. Some major oil consuming countries have formulated energy conservation and emission reduction measures.
B. The recent situation in some major oil-producing countries is still unclear.
C. Application of new energy sources in wider fields
D. Recent frequent natural disasters in the world
Reference answers and analysis:
1.
Answer a
After the analysis and translation of the stem, we can get: true → after testing, only option A is the same, so choose option A.
2.
Answer d
Analysis shows that "impossible P" is equivalent to "inevitable non-P", that is, "impossible to avoid all mistakes" and "inevitable mistakes cannot be avoided" have the same meaning, so choose option D.
3.
Answer d
As can be seen from the stem of the question, computer programming expert → mathematician, that is, all S are P, then it can be concluded that some P are S, that is, some mathematicians are computer programming experts, so choose the D option.
4.
Answer a
Analysis shows that "not all compounds contain carbon", that is, "some compounds contain no carbon", while organic compounds contain carbon, so it can be concluded that some compounds are not organic, so choose option A.
5.
Answer b
According to the analysis, the oil-producing country *→ the oil production is affected → the price fluctuates. Experts predict that the oil price will fall because the situation in this country is under control, that is, the oil production will return to its original state. It can be seen that the price change is closely related to the oil-producing country, but the ACD option has nothing to do with the oil-producing country and can be ruled out, so option B is selected.