标题: commercial plane crashes [打印本页] 作者: Sonehri 时间: 2011-3-24 14:59 标题: commercial plane crashes How do the airlines expect to prevent commercial plane crashes? Studies have shown that pilot error contributes to two-thirds of all such crashes. To address this problem, the airline have upgraded their training programs by increasing the hours of classroom instruction and emphasizing communication skills in the cockpit (飞行员等的)座舱. But it is unrealistic to expect such measures to compensate for pilots’ lack of actual flying time. Therefore, the airlines should rethink their training approach to reducing commercial crashes.
Which one of the following is an assumption upon which the argument depends?
A. Training programs can eliminate pilot errors. B. Commercial pilot routinely undergo additional training throughout their careers. C. The number of airline crashes will decrease if pilot training programs focus on increasing actual flying time. D. Lack of actual flying time is an important contributor to pilot error in commercial plane crashes. E. Communication skills are not important to pilot training programs.
C的话是加强了结论，D正是之前的假设2，所以选D。作者: girlish 时间: 2013-8-30 00:21
我也觉得这题有点想不通啊，虽说是加强但是如果对C选项取非那么是不是变成" the number of airline crashes will not decrease if pilot training programs focus on increasing actual flying time " 这样就削弱了结论的airlines should rethink approach to reducing commercial crashes了啊？？？？在这里我觉得C和D取非都是削弱啊，实在想不明白C为什么不能作为假设？求哪位大神指点指点？？谢谢！！！！！！！！