问小蓝一题

evelyn205205

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 amout of time in close contact with animals, the percentage with animals-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. Azoo 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.
ANSWER: A.
I CHOSE B.
希望各路牛牛帮我答疑解惑，谢谢啦~
我认为A和原文没有什么关系嘛

evelyn205205

多谢sdcar2010~

evelyn205205

XDF的蓝皮书

ran2010zx

小兰是啥。。。

sdcar2010

Premise: Around 30% of current zoo employees have animal-induced allergy.

Conclusion: If people spend time with animals as long as an average zoo employee, the percentage of them who would develop animal-induced allergy is much higher than 30%.

Don't you think it is odd that the general population would have a higher chance to develop animal-induced allergy than zoo employees??? This is a paradox!

Well, if A is true, the conclusion holds and the paradox is explained.  A says that a zoo employee can easily switch jobs to other professions.  Therefore, a fast turnover at the zoo prevents some zoo employees from developing animal-induced allergies and being counted in the zoo employee category. This effectively leads to a lower percentage in allergy cases for zoo employees than it should be for people who spend long time everyday with animals.

B is a weakener.