gwd-18-15

wzhyan

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.

找了一下，没见到有旁人贴过

现在越来越郁闷了

请哪位NN指点啊

bigtone

Fact 1: Asthma < hay fever =>  95%Asthma < 95%hay fever ; Fact 2:  Asthma & hay fever = 95%Asthma;
=> Asthma & hay fever < 95%hay fever; That is the E.

pengpeng13

赞一个，经典！

cici1979923

nn就是nn我的思维没那么缜密，我用的是排除法
must be true就是不能有新的东西出现， 所以AB第一眼就否了prerequisite这个是推测出来的
C.Those who have neither hay fever nor asthma comprise less than 5 percent of the total population. 正文只提到Over 95 percent of people who have asthma also suffer from hay fever.从原文的信息也不可能推出total population的信息来，所以不对

D.     The number of people who have both of these ailments is greater than the number of people who have only one of them.原文说Asthma, a bronchial condition, is much less common ailment than hay fever，所以谁多谁少不知道

E.      The percentage of people suffering from hay fever who also have asthma is lower than 95 percent. 对

梦不落

以下是引用bigtone在2005-12-15 8:03:00的发言：
Fact 1: Asthma < hay fever =>  95%Asthma < 95%hay fever ; Fact 2:  Asthma & hay fever =
  95%Asthma;
  
=> Asthma & hay fever < 95%hay fever; That is the E.

我觉得这道题E也不太对。

Fact2: 因为文中说over 95% of people who have A also suffer from H 应该推出H+A>=95%A

那这样fact 1 and fact 2就不是如楼上的所推出的那样。更何况 E说的是得h的人同时也得A的比率，和楼上推出的那个概念是不一样的

[此贴子已经被作者于2006-6-14 14:11:31编辑过]

eyda_c

以下是引用bigtone在2005-12-15 8:03:00的发言：
Fact 1: Asthma < hay fever =>  95%Asthma < 95%hay fever ; Fact 2:  Asthma & hay fever =
        95%Asthma;
        
=> Asthma & hay fever < 95%hay fever; That is the E.

赞一个!

ETS真是变态, 拿逻辑当数学考!!! 害得我想了很久还愣没做出来!

michaellu97

以下是引用bigtone在2005-12-15 8:03:00的发言：
Fact 1: Asthma < hay fever =>  95%Asthma < 95%hay fever ; Fact 2:  Asthma & hay fever =
        95%Asthma;
        
=> Asthma & hay fever < 95%hay fever; That is the E.

实在是高，

adpang

搞这么复杂，就是个交集问题，学数学的１００人，学语文比学数学更感时髦，就是比学数学的多，比如２００个，又学数学又学语文的９５个，那么可以得出。同时学数学学语文的占学语文的人的比例是小于９５％的。

panglin

thx , ding

花仙子

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