GMAT考试，CR中的评价题应该怎么解？

　　GMAT CR中的评价题应该怎么解？同学们最疑惑的就是这个问题了：评价题究竟让我们评价什么呢？因为它的问法比较奇怪，很多同学甚至不知道评价题究竟是让我们做什么，自然也就无从下手。别担心，看完了这篇文章，相信你会对评价题得心应手的。

　　我们来看一下评价题的问法：

　　In evaluating the argument, it would be most useful to determine which of the following?Investigating which of the following would be most useful in choosing between the competing explanations described above?Which of the following would it be most useful to determine in evaluating the argument?

　　看一下这几种问法的相似之处，无一例外都是让我们通过选项给出的信息去帮原文做决定，也就是说，让我们评价原文的结论是不是对的，或者推理是否合理。这就是评价题最重要的特点了：把选项纳入条件范畴，去评价原文的推理过程或结果。

　　怎样才能有效的评价？

　　既然让我们去评价原文，那么一定是选项会对原文是否成立产生影响，也就是说，选项取不同的答案，会影响到原文逻辑链的达成情况；因此解题思路也就显而易见了：对选项去不同的答案，看它会不会对原文逻辑链产生不同的影响。

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　　举个例子：

　　In many scientific disciplines, scientists generally do not do highly creative work beyond the age of forty, a tendency that has normally been taken to show thataging carries with it a loss of creative capacity. However, by the age of forty most scientists have been working in their chosen field for at least fifteen years, so an alternative explanation is that spending too long in a single field reduces the opportunity for creative thought.Investigating which of the following would be most useful in choosing between the competing explanations described above?

　　A. Whether among those scientists who do highly creative work beyond age forty a large proportion entered their field at a considerably later age than is commonB. Whether scientists' choice of research projects tends to be influenced by their own belief that their most creative work will be done relatively early in their careerC.  Whether scientists who are older than forty tend to find more satisfaction in other activities, such as teaching and mentoring, than they do in pursuing their own researchD. Whether funding agencies are more inclined to award research grants to scientists who are veterans in their field than to scientists who are relative newcomersE. Whether there is significant variation among scientific fields in the average age at which scientists working in those fields are at their most productive

　　这道题是一道评价题里面相对简单的题目，主要探讨的是科学家很少在40岁之后做出creative work的原因，给出了两种可能，一种是因为aging，一种是因为在一个领域呆太久所以失去创造力，简化一下逻辑链：

　　40之后很少creative---aging---spending too long

　　让我们评价的就是上面的论述，也就是说看哪个选项能够帮我们知道究竟是因为哪个原因。

　　这个题目通过选项相关性就可以直接排除掉BCDE四个选项了：

　　B.研究项目的选择，无关

　　C.其他活动，无关

　　D.Funding愿意给谁钱，无关

　　E.不同领域是否年龄不同，无关

　　那么A为什么能够评价呢？应用一下我们的方法，对A取不同的答案：

　　A说的是High Creative的里面是不是一大部分很晚才进入这个领域，如果答案取是，就说明没有spend too long的就能有creative，即选择了第二个解释；如果打啊取否，不是，就说明不是第二个原因，即选择了第一个解释。因此A确实是可以帮我们做出判断的。

　　取是否的方法在evaluate题目中非常有效，以后同学们在做题的时候可以多多应用哦。