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CXD P392-13

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楼主
发表于 2009-12-5 16:56:07 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
No one can be licensed as an elctrician in Parker County without first completing a certain course in eletrical safety procedures. All students majoring in computer technology at Parker County Technical College must complete that course before graduating. Therefore, any of the college's graduates in computer technology can be licensed as an electrician in Parker County.

The answer to which of the following would be most helpful in evaluating the argument?

A  Is a college degree a requirement for being licensed as an electrician in Parker County?

B  Do all students majoring in computer technology who complete the course in electrical safety procedures at Parker County Technical College eventually graduate?

C  Is completion of a course in electrical safety procedures the only way a person licensed as an electrician in Parker County can have learned those procedures?

D  Is a period of practical apprenticeship a requirement for becoming a licensed electrician in Parker County but not for graduating from the college in computer technology?

E  Do any of the students at Parker County Technical College who are not majoring in computer technology take the course in electrical safety procedures?

C为什么不对呢?
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沙发
 楼主| 发表于 2009-12-5 16:58:46 | 只看该作者
答案是D
板凳
发表于 2009-12-5 21:06:10 | 只看该作者
文章脉络是
理论:没有B,不能授予A
结论:而学生全都学了B,因此学生能授予A
这里有个问题,应该说,B是做为A的必要条件,而非充分条件
而结论的话把B当做充分条件说了
思路大概是这样
对D分别取Y或N,就可以判别结论对不对了
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