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16. Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.
Which one of the following is an assumption underlying the argument in the passage?
(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.
(B) Mechanical problems in airplanes have increased dramatically since last August.
(C) Mechanical problems in airplanes have not increased by 50 percent since last August.
(D) Airlines are less reluctant to report mechanical problems than they previously were.
(E) Mechanical problems in airplanes have become easier to detect since last August.
以前NN的回答：原题是 more stringent rules ->airplane mechanical problems have increased 50%
此处是排除他因。原题说RULES引起 increased 50%，假设Mechanical problems自己没increased 50%。 C如取非，原题不成立。E取非，不反原题。这个E不是可能性假设。
我错选D，D取非 reluctant to report不能导致problem increase所以错
1.但是我还是理解D是他因削弱，less reluctant to report导致problem increase。哪里错了？
2.assumption 除了取非weaken原命题外还有什么方法排除干扰选项？比如D，我就FT了
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发表于 2004-4-4 09:28:00
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