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标题: GMAT-27-38请教求解思路 [打印本页]

作者: sv2000 时间: 2005-11-11 14:40
标题: GMAT-27-38请教求解思路

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?

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

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.

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

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

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.

作者: yangsh 时间: 2005-11-11 15:12
B? not sure, need more help.

作者: deanjiang 时间: 2005-11-11 19:06

跟动物呆的时间一样，普通人概率高。（由于zoo中得病的人被转走，所以调查的30％是偏低的）

作者: beibeizhu 时间: 2005-11-11 19:23

同意楼上的gg.选E

这题是某一题的变体.

作者: howardwang 时间: 2005-11-11 20:59

E是对的。

因为动物园的感染过敏者移走到其他岗位，还有30%。

作者: sv2000 时间: 2005-11-13 10:00

谢谢讨论，给出答案是B。不过这题明显应该选E，只怪当初脑袋糊涂呀。

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