61. 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.
为什么选C? 先拜谢！！！ 作者: fybtgn 时间: 2012-2-2 21:50
首先，你要明白题目问的是以下哪个假设削弱结论，underlying
在这里是削弱的意思，不是潜在的意思，所以C选项削弱了原因，因
此导致结论不成立。作者: hongnilvyi 时间: 2012-2-3 06:32
非常感谢作者: Isabella1006 时间: 2012-2-3 21:16
不对吧 我怎么觉得问的是assumption呢
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