狒狒逻辑61题。。。。。。

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. 

我认为:自专家排除人为因素后,一系列检验机器故障的更严格的标准出台,正说明飞机事故

这道题其实是为一个现象找原因：

现象：机械故障报告的频率上升了50%

原因：采取了更严格的检查标准。

换句话说，作者是不是没有考虑到其他原因呢？比如机械故障发生的概率本身就提高很多？而不是更严格的检查才导致报告的数量增多？因此这里作者的前提架设就是机械故障本身并没有提高很多

其实这道题的线索在50%

这种比例题还是比较常见