GWD 26-22

angelhuqi

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.     A zoo employee who develops a serious animal-induced allergy is very

likely to switch to some other occupation.

B.     A zoo 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

这题好像是以前的一个题目的变形,可是我好像还是理解不了,为什么要选A . 请大家赐教

gonghao

注意一个current和general population

现在已经有30％得病了

结论说是在总体人群里数字要比这更大

问支持

A填gap。得病得人转职业，这样新的人补进来，然后再得病，这样current有30％的情况下，总体人群的数目可能会大于这个数字，支持了结论

angelhuqi

哦,明白了, 多谢版主. 出去的人都是有病的, 进来的人都是没病的,所有外面的得病率会更高.但是我原来理解题意是说,外界的人本来得病率就很高了.原来是因为这个原因啊

dan2007

up

cathyzq

A.     A zoo employee who develops a serious animal-induced allergy is very

likely to switch to some other occupation.

B.     A zoo employee is more likely than a person in the general population

to keep one or more animal pets at home 肯定无关，跟题目内容一点连接都没有。

C.     The percentage of the general population whose level of exposure to

animals matches that of a zoo employee is quite small. 削弱结论。

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. 从逻辑推理中没有跳到这一层逻辑。

E.      Zoo employees seldom wear protective gear when they handle animals

in their care. 出现“Protective gear"新概念，所以不对。从另外一方面说动物园职员是因为没有穿保护设施，所以容易得过敏症，但是如果一般的人和动物接触，也不会去考虑带这个保护装置的，所以只能证明它可能容易得过敏症，但是不能证明比30%这个数字更严重。所以从问题选项MOST SUPPORT上来说不绝对！

一开始，我并不会选A，利用排除法，但是最后我发现，A选项，人们除了接触动物可能得到过敏症，还有一种可能，这些过敏症是通过不接触动物，接触有这个感染源的人，所以在”相同的大量的接触时间“为基础上，又多了这样一个接触源，所以一般人群得动物过敏症的比例明显要高于动物园工作人员，所以A可以推出来最支持最后的结论！

一开始，我并不会选A，利用排除法，但是最后我发现，A选项，人们除了接触动物可能得到过敏症，还有一种可能，这些过敏症是通过不接触动物，接触有这个感染源的人，所以在”相同的大量的接触时间“为基础上，又多了这样一个接触源，所以一般人群得动物过敏症的比例明显要高于动物园工作人员，所以A可以推出来最支持最后的结论！

[此贴子已经被作者于2008-3-26 10:18:28编辑过]

pharmacystar

up

看来要仔细读题干呀

很仔细的读

读出作者的重心和意图

pharmacystar

其实这里考察的就是取样的科学性，这个sample与general population相比的话
        偏低了

这也是argument里常考得一个话题

 

而且我们通常会觉得动物园里接触动物会比外面频繁

所以觉得动物园是高发区

这次是逆向思维

因为限定了一个条件  have spent a similarly large amount of time in close contact

with animals
                

with animals
        

weideng

2楼回答的妙极了!!

jintian

w

desertroset

顶