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标题: feifei63 求教 [打印本页]

作者: cattsky 时间: 2006-9-22 18:24
标题: feifei63 求教

63. Some good cooks are gourmet cooks who pride themselves on always using extravagantly rich ingredients in elaborate recipes. Some good cooks can be characterized as fast-food cooks. They may use rich ingredients as long as the recipes are easy to follow and take little time. Other good cooks are health food enthusiasts, who are concerned primarily with the nutritional value of food. But even though not all good cooks are big eaters, they all enjoy preparing and serving food.

If the information in the passage is true, which one of the following CANNOT be true?

A.        Most good cooks do not use extravagantly rich ingredients.

B.        Everyone who enjoys preparing and serving food is a good cook.

C.        More good cooks who use extravagantly rich ingredients are big eaters than are good cooks who do not use such ingredients.

D.       There are fewer good cooks who enjoy serving and preparing food than there are good cooks who are big eaters.

E.        Gourmet cooks, fast-food cooks, and cooks who are health food enthusiasts are all big eaters.

 Key：D

B怎么会是对的呢？？原文是：好厨师不一定爱吃，但都享受制作过程。

B是他的逆命题：享受制作的人都是好厨师。怎么会对呢？？

confused！help!

作者: wawa1983 时间: 2006-9-22 22:37

题目是问的是can not be true，所以要选一定错的

Ｂ是有可能对也有可能错的，故不能选

作者: cattsky 时间: 2006-9-23 19:34
有道理，谢谢啦

作者: alohame 时间: 2006-9-24 20:29

last题看着是晕！

作者: cx1205 时间: 2006-9-25 09:32

以下是引用wawa1983在2006-9-22 22:37:00的发言：

题目是问的是can not be true，所以要选一定错的

Ｂ是有可能对也有可能错的，故不能选

如果问can be true就要一定找和原文结论说法相反的,不能找结论的逆或着否命题,是这意思吗

作者: cattsky 时间: 2006-9-27 13:10

同意楼上所说的,这种例子在feifei里还蛮多的.

刚才看到feifei74,E选项就是B选项(正确)的否命题,结果错了

作者: elaine1031 时间: 2009-7-12 17:29
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