People who have spent a lot of time in contact withanimals often develop animal-induced allergies, some of them quite serious. Ina survey of current employees in major zoos, about 30 percent hadanimal-induced allergies. Based on this sample, experts conclude that amongmembers of the general population who have spent a similarly large amount oftime in close contact with animals, the percentage with animal-inducedallergies is not 30 percent but substantially more.
Which of the following, if true, provides the strongestgrounds for the experts’ conclusion?
A. A zoo employee who develops a seriousanimal-induced allergy is very likely to switch to some other occupation.
B. A zoo employee is more likely than a personin the general population to keep one or more animal pets at home
C. The percentage of the general populationwhose level of exposure to animals matches that of a zoo employee is quitesmall.
D. Exposure to domestic pets is, on the whole,less likely to cause animal-induced allergy than exposure to many of theanimals kept in zoos.
E. Zoo employees seldom wear protective gearwhen they handle animals in their care.
很多人都说是A，但是我觉得这个原因不会造成 substantially more
D为什么不对呢 家养宠物比较不可能造成过敏 这个原因不是更明显么？？
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发表于 2011-6-6 18:10:07
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