feifei-77

zzzandy

        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 airlines 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 pilots 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.（D）

       (E) Communication skills are not important to pilot training programs

答案是D，

我选C， 后面的解释说C是加强， 请NN指教一下，加强和假设的区别，如何区分选项是加强还是假设。感谢了 ！

[此贴子已经被作者于2008-9-5 1:18:58编辑过]

zzzandy

哪位高手指教一下

red_dust

这个就是充分条件和必要条件的问题

如果一个东西取非的话会导致题目结论不成立，那么它就是假设或前提（assumption, premise）

如这道题里把(D) Lack of actual flying time is an important contributor to pilot error in commercial plane crashes.那么题目中说the airlines should rethink their training approach就不成立了

zzzandy

谢谢楼上，虽然有22人看过，还是你愿意帮助，D我明白，但考试时候不可能知道答案再来分析题目。

我的问题是，或感觉是，C 取非，同样使the airlines should rethink their training approach就不成立了。

不知道问题出在哪里？

wallstreeter

(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.
这两个可以一起看，不同之处在于，c中的decrease并不能说明Lack of actual flying time是important的，因为decrease可以是效果很小，比如一年减少一次crash
这样的话起不了assumption的关键作用，顶多support一下
d中说明Lack of actual flying time is an
            important contributor 这样的话rethink their training approach 才能 reduce commercial crashes

一点拙见

zzzandy

有点感觉了，还有其他说法吗？