People who do well in the sled pull competition have tremendous upper body strength. Caleb has tremendous upper body strength. Therefore, Caleb performed well in the sled pull competition. Which one of the following contains the same reasoning that is presented in the passage?
A. People who are anemic cannot donate blood. Mary donates blood regularly. Therefore, she must not be anemic.
B. People who swim competitively are thin and muscular. Ben is thin and muscular Therefore, Ben is a competitive swimmer.
C. People who volunteer at the trauma center must handle being on their feet all day. Casey is a frequent volunteer at the trauma center. Therefore, he must handle being on his feet all day.
D. People who are overly sensitive to the cold cannot work at the Arctic substation. John is overly sensitive to the cold. Therefore John cannot work at the Arctic substation.
E. People who have ulcers cannot eat spicy hot food. Kevin has recurrent ulcers. Therefore Kevin is on a bland diet.
这题答案是C没错，题目说 由 do well in sled competition 推出 tremendous upper body strength，我们可以看出是由正命题推出正命题，题目后半段是原命题的逆命题 由 tremendous upper body strength 推出 do well in sled competition，而且2个命题都是正确的。 所以，我们就要找一个类似这种形式的答案，AE 就不说了，B 你仔细想想 逆命题是错的，谁说瘦但有肌肉的人一定就是swimmer呢？D没有发现逆命题！ Make sense？
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发表于 2012-10-16 08:51:56
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