1)FACT 1: ASTHMA(哮喘)和另一中病A都是常见病, BUT ASTHMA IS LESS COMMON THAN A;
=> A > ASTHMA
FACT 2: 95%ASTHMA患者也得A. => A and ASTHMA = 95%ASTHMA
1) 2) => 95%A >95%ASTHMA > A and ASTHMA => LESS THAN 95% A 患者也得ASTHMA作者: tongxun 时间: 2002-9-25 21:10
就是一个DS题目。非常清晰!谢谢!
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