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以下是引用yvonne703在2003-11-13 21:40:00的发言：
25. All of the best comedians have had unhappy childhoods （O〕 Yet, many people who have had happy childhoods are good comedians（I）, and some good comedians who have had miserably unhappy childhoods are happy adults（P〕.
If the statements in the passage are true, which one of the following CANNOT be true?
(A) The proportion of good comedians who had unhappy childhoods is greater than the proportion of the best comedians who did.
(B) Some good comedians have had unhappy childhoods and are unhappy adults.
(C) Most of the best comedians are happy adults.
(D) More good comedians have had unhappy childhoods than have had happy childhoods.
(E) The proportion of comedians who are happy adults is higher than the proportion who are unhappy adults.
答案是A, 但是我不知道为什么,还有这种类型题的解题思路
I＝many people who have had happy childhoods are good comedians由此可以推出some people who have had unhappy childhoods are good comedians
P=and some good comedians who have had miserably unhappy childhoods are happy adults由此可以推出some good comedians who have had miserably unhappy childhoods are unhappy adults
综上可以推出〔H〕some good comedians had unhappy childhoods 即一部分
而O是All of the best comedians have had unhappy childhoods 即100％
所以O的比率不可能比H小，所以A错
这个涉及到直言判断。比较复杂 | 
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发表于 2003-11-13 21:40:00
