从未讨论过的，帮一下忙 - ChaseDream

Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.

此题答案选C, 我知道别的选项错在哪里，但是不知道C为什么对？？感觉C跟问题问的向反了呢

这里面有个assumption 就是两次考试难度相当或者说这次考试不比上次的容易

这题道理一样现在去医院的人数比十年前多了所以现在的过敏源多了或者他们更容易过敏了 assumption就是当发生过敏的时候现在的人不比十年前的人更喜欢去医院

注意一个小窍门否定句是gmat 考assumption常见的正确答案因为方便用取非削弱去验证

以下是引用overthere33在2009/8/20 16:37:00的发言：

举个例子给你

我这次考试比上次考的好结论我的水平提高了

这里面有个assumption 就是两次考试难度相当或者说这次考试不比上次的容易

如果说这次容易就不能得出结论说我水平提高了

注意一个小窍门否定句是gmat 考assumption常见的正确答案因为方便用取非削弱去验证