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.
答案是C吧B.
Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances. 无关选项 作者: zhangluE 时间: 2010-10-21 21:22
why answer is C?
I am confused...作者: liexodus 时间: 2010-10-22 06:39
C. ..... not more likely.... 保持过去和现在在同一条件下... 有问题就送到护士.. 好像是这样...作者: brunhildS 时间: 2010-10-22 20:47
