求助高手帮忙解决一道题！

向lse进击！ · 发表于 2015-7-30 18:15:58

这道题是新东方那本逻辑砖头上，归纳部分最后一道题。题目是这样的
Most parents who are generous are good parents, but some self-centered parents are also good parents. Yet all good parents share one characteristic: they are good listeners.
If all of the statements in the passage are true, which one of the following must also be true?
(A) All parents who are good listeners are good parents.
(B) Some parents who are good listeners are not good parent.
(C) Most parents who are good listeners are generous.
(D) Some parents who are good listeners are self-centered.
(E) Fewer self-centered parents than generous parents are good listeners
答案是D。可是逆命题为什么对啊！！！求大神来给解答！！！

alzn2765 · 发表于 2015-8-6 00:34:50

用数集画圈的方法把这四种人用包含于被包含的方式画出来，一看就出来了。

求助高手帮忙解决一道题！

所属分类: GMAT考试

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