GMAT逻辑题想要高正确率还得靠细节取胜！精读、细节"

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本文作者：雷哥GMAT逻辑名师Sharron

我们常常会跟同学们说，做CR题的过程中一定要完完整整的把题干中的每一个单词都读到，5个选项也要看完整。为什么？

首先，

CR的题干文章通常都是从美国的文献或者论文中的节选，并通过语法结构的调整，压缩成不足100个字的短文章，其中蕴含的信息量非常丰富。如果读题不仔细，非常容易错过其中的关键信息，影响对选项的分析。

我们可以以下面这道题举例分析：

In parts of South America, vitamin-A deficiency is a serious health problem, especially among children. In one region, agriculturists hope to improve nutrition by encouraging farmers to plant a new variety of sweet potato called SPK004 that is rich in betacarotene, which the body converts into vitamin A. The plan has good chances of success, since sweet potato is a staple of the region’s diet and agriculture, and the varieties currently grown contain little beta-carotene.

Which of the following, if true, most strongly supports the prediction that the plan will succeed?

A. There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do.

B. The flesh of SPK004 differs from that of the currently cultivated sweet potatoes in color and texture, so traditional foods would look somewhat different when prepared from SPK004.

C. For successful cultivation of SPK004, a soil significantly richer in nitrogen is needed than is needed for the varieties of sweet potato currently cultivated in the region.

D. There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.

E. The currently cultivated varieties of sweet potato contain no important nutrients that SPK004 lacks.

整篇文章通读下来会觉得是在谈论维他命A，于是就会有同学在D选项和E选项之间纠结。请同学们注意文章中的这句话“agriculturists hope to improve nutrition by ……”对于计划类的的文章，to do sth. 的表达往往是表示计划要达成的目标，所以虽然文章大段都在谈论维他命A，只有这里提到了营养，我们可以认为增强营养是个大目标，而维他命A是其中的一个子目标。所以在看选项的时候，虽然D选项提到维他命A的比较，但是E选项是从整体营养成分来进行讨论，更贴近原文讨论范畴。于是正确答案就应该是E。

另外，对于CR题的选项，GMAC的官方设置是会有1到2个相关的选项，也就是5个选项中有可能会出现2个选项看起来都正确，比如上题中的D和E。那就需要我们从中选择匹配性相关性最高的一个选项，也就是所谓the most appropriate。如果我们在读上题选项的时候，看到一个D选项就直接选择提交，那么就会错过E这个正确选项。所以即使是做题的时候认为A选项是一个正确选项，也不要急于提交答案，在时间允许的情况下，尽量将后面的选项都读一遍，来验证我们的选择是否正确。

因此，对于CR题来说，无论题干、问题还是选项，永远只有精读，关注细节，才能保证更高的正确率。

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