GWD26-Q22 与 GWD27-Q28 求NN分析~

clumsyorange

22. 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?


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.


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GWD27-Q28 (GWD-26-Q22）
People who have spent a lot of time in contact with animals often develop animal-induced allergies, a significant percentage of which are quite serious.  In a survey of current employees in major zoos, about 30 percent had animal-induced allergies.  However, a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.
Which of the following hypotheses receives the strongest support from the information given?


A.    The incidence of serious animal-induced allergies among current zoo employees is lower than that among the general population.
B.    Zoo employees tend to develop animal-induced allergies that are more serious than those of other people who spend equally large amounts of time with animals.
C.    Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than is exposure to the kinds of animals that are kept in zoos.
D.    There is no occupation for which the risk of developing an animal-induced allergy is higher than 30 percent.
E.    Among members of the general population who have spent as much time with animals as zoo employees typically have, the percentage with animal-induced allergies is significantly more than 30 percent.

fondy

补上个贴子。
假设永远不换工作，工作在动物园和外面的人过敏比例都只会是30%。
然而由于动物园工作的过敏职员换工作，
这些职员是过敏的且接触时间一样多。所以转职到动物园以外的人时分子和分母都要增加。因为是真分数，越加越大，结果绝对会大于30%

nanisoga

个人觉得support题型是GMAT中最不容易联想答案的一种题型，答案的种类太多，但是，support题型有它独有的答案设置方式，通常support选项由 无关，削弱，和support 三类，support很难联想，但weaken和无关却很好找到，例如第一题中zoo employee 患病率30%推出general population大于30%，可以发现CDE,均是weaken，而B选项中keep pets at home是无关选项，只剩下A了

clumsyorange

个人觉得support题型是GMAT中最不容易联想答案的一种题型，答案的种类太多，但是，support题型有它独有的答案设置方式，通常support选项由 无关，削弱，和support 三类，support很难联想，但weaken和无关却很好找到，例如第一题中zoo employee 患病率30%推出general population大于30%，可以发现CDE,均是weaken，而B选项中keep pets at home是无关选项，只剩下A了

-- by 会员 nanisoga (2010/7/7 21:51:05)

这样的思路确实能把不少问题明晰了，我之前用的逻辑方法只是找key来定位，并没有过多focus在对此产生的正负评价的基础上。有一些题比较妖的，只能通过逻辑语义来进行解释。呵呵。


不过这题我后来也找到了Key，GWD26-Q22是Assumption题，TS为 In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. 所以定位在原因的关键词（current employees）上面，这题只是B选项干扰比较大，A是正确的，能直接在逻辑上架起原因和结果的bridge。
而下面的变种题GWD27-Q28刚好相反，为conclusion题，TS同样是 In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. 后面的However部分只是作为得出最后结论之前的一个补充条件而已。定位的关键词应该为30 percent，直接在percent这里做推论即可。


不知道这样想有没有遗漏什么？还请大牛们看看~

jessiecg

我是这样理解的，不知道对不对，本身大家过敏的概率都是一样的，但因为有些在动物园工作的人受不了过敏所以换了工作，那么统计时就少统计了这一部分，使得30%先得比大众得病的概率低。

wxx1199

但动物园过敏的人的比例这题答案是E啊

chaseshi

这题的关键是，ASSUME 与动物接触同样多的时间，普通人和动物园员工的过敏比率是一样的。所以不是说，员工换工作会让普通人的比率升高，而仅是让动物园员工的比率减少罢了。不用纠结员工换工作还是不是和动物相关。

nolanhym

为什么我觉得这道题答案是E呢，

E 看起来像是削弱，实际上是在说：动物园管理员有时候会穿防护服。

所以证明动物园管理员有可能更少的感染疾病。

比目鱼香肉丝

这题很经典。
A 一定错。
B 题目中根本没有比较。
C domestic pets 题目中没有提到。
D 根本推不出来。
E  比较有意思。动物园的管理员的得病率一直为30%，而 general population 中的得病率会由于患病的动物管理员的加入而增多。自然会高于30%。

fondy

among members of the general population who have spent a similarly large amount of time in close contact with animals
理解了这点就知道a是正确的。