费费逻辑77题

发帖前以搜了相关的帖子,还是不太清楚:

77. 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. 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.

这里C和D的区别实在不明显,我只觉得读起来D更象一个假设,就选了D.

解释说C是支持项,但我觉得C取非也能削弱原文:如果项目集中在增加实际飞行时间上不能减少客机相撞的事故数(两者之间没什么关系),那原文提出因为这个项目缺乏实际飞行时间而需要重新考虑(两者之间有关系)就被削弱了.

请斑斑及各位解答一下: