PRINTABLE ELSAT中几道题迷惑

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TEST3 SEC1:
CR 18 D和C不太区别的开.
CR 23 C有什么用?
      SEC2:
CR 16 D好像也对.

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不好意思,我以为大家都有呢,加上LSAT的题不能直接贴上,就犯了懒.

redtea

Questions 17--18

The question whether intelligent life exists elsewhere in the universe is certainly imprecise, because we are not sure how different from use something might be and still count as "intelligent life" Yet we cannot just decide to define "intelligent life" in some more precise way since it is likely that we will find and recognize intelligent life elsewhere in the universe only if we leave our definitions open to new, unimagined possibilities.

17. The argument can most reasonably be interpreted as an objection to which one of the following claims?

(A) The question whether intelligent life exists elsewhere in the universe is one that will never be correctly answered.

(B) Whether or not there is intelligent life elsewhere in the universe, our understanding of intelligent life is limited.

(C) The question about the existence of intelligent life elsewhere in the universe must be made more precise if we hope to answer it correctly.

(D) The question whether there is intelligent life elsewhere in the universe is so imprecise as to be meaningless.

(E) The question whether there is intelligent life elsewhere in the universe is one we should not spend our time trying to answer.

18. The passage, if seen as an objection to an antecedent claim. Challenges that claim by:

(A) showing the claim to be irrelevant to the issue at hand

(B) citing examples that fail to fit proposed definition of "intelligent life"

(C) claiming that "intelligent life" cannot be adequately defined.

(D) arguing that the claim, if acted on, would be counterproductive

(E) maintaining that the claim is not supported by the available evidence.

18题C,D选项,请做说明.

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23. When 100 people who have not used cocaine are tested for cocaine use, on average only 5 will test positive. By contrast. of every 100 people who have used cocaine 99 will test positive. Thus, when a randomly chosen group of people is tested for cocaine use. the vast majority of those who test positive will be people who have used cocaine.

A reasoning error in the argument is that the argument

(A) attempts to infer a value judgment from purely factual premises.

(B) attributes to every member of the population the properties of the average member of the population.

(C) fails to take into account what proportion of the population have used cocaine.

(D) ignores the fact that some cocaine users do not test positive.

(E) advocates testing people for cocaine use when there is no reason to suspect that they have used cocaine.

条件C有什么用?

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16. Concetta: Franchot was a great writer because she was ahead of her time in understanding that industrialization was taking an unconscionable toll on the family structure of the working class.

Alicia: Franchot was not a great writer. The mark of a great writer is the ability to move people with the power of the written word, not the ability to be among the first to grasp a social issue Besides, the social consequences of industrialization were widely understood in Franchot’s day.

In her disagreement with Concetta, Alicia does which one of the following?

(A) Accepts Concetta’s criterion and then ads evidence to concetta’s case

(B) Discredits Concetta’s evidence and then generalizes from new evidence

(C) Rejects Concetta’s criterion and then disputes a specific claim

(D) Disputes Concetta’s conclusion and then presents facts in support of an alternative criterion

(E) Attacks one of Concetta’s claims and then criticizes the structure of her argument

D好像也对?