标题: GWD14的第15题求解~~~ [打印本页] 作者: cicilive 时间: 2012-4-28 10:08 标题: GWD14的第15题求解~~~ 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作者: rgggg 时间: 2012-4-28 10:35
呃 应该选e吧作者: colababy7 时间: 2012-5-7 17:51
谈谈我的见解吧 ，不一定对哦！ 首先，FACT里的people who have asthma also suffer from hay fever 与E项的people suffering from hay fever who also have asthma的总数肯定一样吧（只是对应的分母不同，比例肯定不同） 然后，你看啊，FACT里面还说得hey fever的总人数是超过asthma的 最后，我们假定又有asthma又有hey fever的人数是A,得hey fever的人数是X,得asthma的人数是Y，因为X>Y，所以A/X<A/Y，又A/Y=95%，所以A/X<95%，就选E了作者: wysgd 时间: 2014-5-27 16:25
其实这道题不用这么麻烦，题干中的fact就已经说了 Asthma is much less common ailment than hay fever，所以说患有h中的人又患有a的肯定比患有a中又患有h的占比要小 作者: wysgd 时间: 2014-5-27 16:26
其实这道题不用这么麻烦，题干中的fact就已经说了 Asthma is much less common ailment than hay fever，所以说患有h中的人又患有a的肯定比患有a中又患有h的占比要小 作者: TiedAdam 时间: 2020-7-8 17:27
发表一下个人看法，这道题不知所云的原因就是rate没法理解是95%到底是谁比谁，超过95%患a同时患h也就是患a且患h的人在患a的人中占超过95%的比例，也就是：
（患a且患h）/（患a）over 95%；
同时我们知道 患a less common than 患h，
而E选项说的正是，（患a且患h）在患h的总人数中的比例，也就是（患a且患h）/患h，自然是less than 95%了。
，不一定对哦！