急问GWD一题

walksnow · 发表于 2006-2-24 23:05:00

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?

Hay fever is a prerequisite for the development of asthma

Asthma is a prerequisite for the development of hay fever

Those who have neither hay fever nor asthma comprise less than 5 percent of the total population

The number of people who have both of these ailments is greater than the number of people who have only one of them

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

这题答案是什么啊？

Youknowme · 发表于 2006-2-24 23:57:00

请楼主在题目中注明题目具体来源，谢谢合作！

ritta · 发表于 2006-2-25 00:06:00

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