标题: 动物30%那道逻辑提，请牛牛指点 [打印本页] 作者: 纳丁Cat 时间: 2011-4-12 14:49 标题: 动物30%那道逻辑提，请牛牛指点 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?支持
A. A zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation. T B. A zoo employee is more likely than a person in the general population to keep one or more animal pets 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
求助啊作者: lonelyorchid 时间: 2011-4-12 17:35
逻辑是，如果动物的饲养者患了过敏，那么他就会被调到其他岗位，因而减少了在调查范围内的动物饲养者患过敏的比例。说明患过敏的比例高于30%。如果平常人跟动物饲养者接触动物的频率相同，那么其患病比例也应高于30%作者: dengts 时间: 2011-4-12 17:42
A is correct.If I faces this question,I will find a gap in the reasoning.In the conclusion sentence,where is the infomation relationg to zoo emplyee?We must eliminate the gap between zoo emplyees and members of the general population,thus choosing A.作者: 纳丁Cat 时间: 2011-4-18 13:41
谢谢啊~，明白咯作者: 纳丁Cat 时间: 2011-4-18 13:42
找gap.很好~~作者: spoon0212 时间: 2013-6-23 11:40
