GWD27-Q28 (GWD-26-Q22）似曾相识，求解！ - ChaseDream

这是TN17里一道附加的题目，没有给出答案，小弟选B，不知对否？

People who have spent a lot of time in contact with animals often develop animal-induced allergies, a significant percentage of which are quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. However, a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.

Which of the following hypotheses receives the strongest support from the information given?

A. The incidence of serious animal-induced allergies among current zoo employees is lower than that among the general population.

B. Zoo employees tend to develop animal-induced allergies that are more serious than those of other people who spend equally large amounts of time with animals.

C. Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than is exposure to the kinds of animals that are kept in zoos.

D. There is no occupation for which the risk of developing an animal-induced allergy is higher than 30 percent.

E. Among members of the general population who have spent as much time with animals as zoo employees typically have, the percentage with animal-induced allergies is significantly more than 30 percent.

可不可以这么看, 即使People who have spent a lot of time in contact with animals(第一组)得allergies的概率和current employees in major zoos(第二组)是一样的,也就是30%(暂且不看文中说的often是不是有可能大于30%), 由于a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation使得第一组的比例超过30%

偶的答案给的是C，不知道哪个没有逻辑的给的答案。看了几个讨论帖，答案是E。偶作对啦。哈哈。。。

而，与动物接触时间与动物园内工作的人一样的普通人（the general population who have spent as much time with animals as zoo employees typically have），不存在“换工作”的问题。因此，就相当于“感染了的动物园工作人员，一直还留在动物园里面继续保持与动物的接触，虽然不断有新人补充进来，但是整个比例肯定高于30％”

目前动物园内的比例是30％，这是建立在很多人换了工作之后的比例，因为
However, a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.“重新招聘进去的人不一定过敏。”，因此，如果这些人不换工作，一直在动物园工作的话，这个比例会高于30％。
而，与动物接触时间与动物园内工作的人一样的普通人（the general population who have spent as much time with animals as zoo employees typically have），不存在“换工作”的问题。因此，就相当于“感染了的动物园工作人员，一直还留在动物园里面继续保持与动物的接触，虽然不断有新人补充进来，但是整个比例肯定高于30％”

-- by 会员 sunjin1988 (2009/10/12 16:29:00)