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标题: Assumption题的一种排除法 [打印本页]

作者: jeansummer 时间: 2008-6-5 13:24
标题: Assumption题的一种排除法

Assumption题和归纳题一样，也可以用无关词排除法，因为Assumption题一定是文章成立的必要条件。

这里的无关词就包括极端词，比如All, only, no

比如下面一道题：

Feifei 80. Advertisement: Clark brand-name parts are made for cars manufactured in this country. They satisfy all of our government automotive tests-the toughest such tests in the world. With foreign-made parts, you never know which might be reliable and which are cheap look-alikes that are poorly constructed and liable to cost you hundreds of dollars in repairs. Therefore, be smart and insist on brand-name parts by Clark for your car.

The argument requires the assumption that

A. Clark parts are available only in this country
B. foreign-made arts are not suitable for cars manufactured in this country
C. no foreign-made parts satisfy our government standards
D. parts that satisfy our government standards are not as poorly constructed as cheap foreign made parts
E. if parts are made for cars manufactured in our country, they are not poorly constructed

答案是D：取非削弱，即使符合了government standards, 但是如果质量和foreign made parts一样差，就推不出最后的结论了。

对于选项C: 表面上取非也削弱，如果有些foreign made parts符合了government standards，那就不是所有的foreign made parts都poorly constructed了。但是请注意，这里用了"no"，这是个极端词，不是文章的“必要条件”，所以错！

欢迎拍砖！

作者: jeansummer 时间: 2008-6-6 15:16

没人回么？好吧……我自己顶

作者: celery28 时间: 2008-6-6 19:06

我顶

谢谢MM好心

作者: jeffreygjf 时间: 2008-6-6 21:23
开始交流方法了，说明复习卓有成效阿

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