GWD-9-Q13 有点完全不理解作者思维的感觉

roxy423

Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.
Fact: over 95 percent of people who have asthma also suffer from hay fever.

If the information given as facts above is true, which of the following must also be true?

A.    Hay fever is a prerequisite for the development of asthma
B.    Asthma is a prerequisite for the development of hay fever
C.    Those who have neither hay fever nor asthma comprise less than 5 percent of the total population
D.    The number of people who have both of these ailments is greater than the number of people who have only one of them
E.    The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
     这题有点看不懂 自己资料上的解释也不够给力。求大牛指点~~

线香花火

首先是说A<B
那么你可以试着画个图，一个小圆和一个大圆有重叠部分，此重叠部分占了小圆的95%，那么就不可能占大圆的95%了，一定比95%少~~

roxy423

谢谢楼上啊 瞬间顿悟~~

勇者无疆

在考Verbal得时候草稿纸会被收上去，怎么画图啊？

爱琴言

顶！做了N遍这个题就是弄不清楚，原来是韦恩图啊。。外国人真喜欢这个。。

线香花火

在考Verbal得时候草稿纸会被收上去，怎么画图啊？

-- by 会员 勇者无疆 (2011/9/17 20:42:12)

真的吗？？那我觉得有时候逻辑还是会牵扯到数学的比值啊什么的。。没有草稿纸还挺麻烦的