Scientists typically do their most creative work before the age of forty. It is commonly thought tha...

题目信息

Scientists typically do their most creative work before the age of forty. It is commonly thought that this happens because aging by itself brings about a loss of creative capacity. However, a study has found that almost all scientists who produce highly creative work beyond the age of forty entered their fields late and less than a dozen years before their creative breakthroughs. Since creative breakthroughs by scientists under forty also generally occur within a dozen years of the scientist's entry into the field, the study's finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not due to age but rather because most have spent too long in their fields.

In the argument given, the two portions in boldface play which of the following roles?

A:The first is the position that the argument as a whole defends; the second is evidence that is advanced as part of that defense.

B:The first and second are both claims that have been advanced in support of a position that the argument as a whole opposes.

C:The first is an explanation that the argument challenges; the second provides evidence in support of a competing explanation that the argument defends.

D:The first is an explanation that the argument challenges; the second is evidence that has been used against an alternative explanation that the argument defends.

E:The first is an explanation that the argument defends; the second is evidence that has been used to challenge that explanation.

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正确答案： C:The first is an explanation that the argument challenges; the second provides evidence in support of a competing explanation that the argument defends.

首先，BF 1在because的引导下，是一个explanation,一定不是position。帮排除ABE;

CD间选择，C是支持文中argument defends，D是反对文中argument defends。很显然。在第一句BF后面就接了一个However，说明后面观点与前面不同，而后面观点是作者持有的，那么BF 2肯定支持argument的。因此选C.

笔记