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标题: GMAT-26-22请教求解思路 [打印本页]

作者: sv2000 时间: 2005-11-11 14:36
标题: GMAT-26-22请教求解思路

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 zoo employee who develops a serious animal-induced allergy is very
likely to switch to some other occupation.

A zoo employee is more likely than a person in the general population
to keep one or more animal pets at home

The percentage of the general population whose level of exposure to
animals matches that of a zoo employee is quite small.

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

Zoo employees seldom wear protective gear when they handle animals
in their care.

作者: yangsh 时间: 2005-11-11 15:37

不懂，牛牛帮忙。觉得A也不通

啊？

作者: deanjiang 时间: 2005-11-11 18:47

UP A

文中：

zoo 30％，结论普通人更高。

A说明了调查的时候30%的数字偏低，因为有些已经被感染的人调走了。

作者: sv2000 时间: 2005-11-13 08:49

谢谢3楼解释。

作者: mimixiaxia 时间: 2007-8-31 10:27
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