求大神指点一下两个CR问题，最好附加解释！！

jiangpengcheng

22. GWD26-Q22
People who have spent a lot of time in contact with animals often develop animal-induced allergies, some of them quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. Based on this sample, experts conclude that among members of the general population who have spent a similarly large amount of time in close contact with animals, the percentage with animal-induced allergies is not 30 percent but substantially more.
Which of the following, if true, provides the strongest grounds for the experts’ conclusion?

A.    A zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.
B.    A zoo employee is more likely than a person in the general population to keep one or more animal pets at home
C.    The percentage of the general population whose level of exposure to animals matches that of a zoo employee is quite small.
D.    Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than exposure to many of the animals kept in zoos.
E.    Zoo employees seldom wear protective gear when they handle animals in their care.

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GWD27-Q28 (GWD-26-Q22）
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.

旅途中的脚印

1、有严重过敏症状的动物园工作人员很可能转行，因此现在30%的过敏率是低估的。以此类推到普通人群，如果普通人群接触动物的时间和动物园工作人员一样，那么他们过敏的概率应该大于30%。
2、同1

coldwindcz

LS正解

jiangpengcheng

那这两题答案应该各是什么呢？？

旅途中的脚印

AA

AIWeak

AE?

saraxu1990

那请问第二道题A和E的区别是？？

saraxu1990

AA

-- by 会员 旅途中的脚印 (2012/9/12 23:17:42)

第二道题AE的区别是？？

macrostrong

第二题应该选E。

AE的区别是，E中限定了跟Zoo Employee 比较的General Population是跟Zoo Employee花了同样时间跟动物相处的。 这样就让两者更具有可比性。