请教:GWD-9-13 D为什么不对

janywu2000 · 发表于 2007-10-1 20:46:00

GWD-9-Q13:

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.

我选的是D,看了讨论,知道了为什么选E,可是好象D也同样说得通啊,请NN指教.谢谢! 图片点击可在新窗口打开查看

phoebelulu · 发表于 2007-10-1 21:13:00

D是不正确的

A这种病不常见,说明得A的人很少(只占总人数的少数).

H比较常见,说明得H的比较多,比得A的人多

得A的人里面95%得H,说明得A又得B的人,还不如只得A的人多

D选项说两种病都得的人比只得一种的人数多,就是说A里面的95%比另外5%+只得H的多,和原题信息矛盾,所以不对

janywu2000 · 发表于 2007-10-1 21:29:00

哦，知道了，谢谢

本贴相关题目 TN-07-CR-13TN-07-CR-13
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