题目信息
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.
参考答案及共享解析
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正确答案：
E:The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
像这种有交集的CR题，可以考虑画图法做：
1. Asthma is less common, 所以Asthma是小圆
2. Hay fever is more common，所以是大圆
3. 一个小圆和一个大圆交叉，交叉面积占小圆的95%，那么交叉面积占大圆肯定小于大圆的95%
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题目来源
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