Q5:

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.

Which of the following is an assumption on which the argument depends?

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.

我选了D 后来仔细看看，发现我当时的思路是，在学校的事故是因为家里的原因带出来的

好像错就错在 children in school 和 schoolchildren 是不一样的，这里就讨论人    这么说对吗？

注意，原文里面没有说明区分学校和家庭的使用，原文里面只是说 schoolchildren 而已。

C

比起10年前，现在有更多的人被送去校卫生所

结论是通过人数来进行推断的，这人数有它因的话就被削弱