请教feifei 23

Amyfly

23. On a certain day, nine scheduled flights on Swift Airlines were canceled. Ordinarily, a cancellation is due to mechanical problems with the airplane scheduled for a certain flight. However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, some of the nine cancellations were probably due to something else.

The argument depends on which one of the following assumptions?

 

A.        More than one or two airplanes were scheduled for the nine canceled flights.

B.        Swift Airlines has fewer mechanical problems than do other airlines of the same size.

C.        Each of the canceled flights would have been longer than the average flight on Swift Airlines.

D.       Swift Airlines had never before canceled more than one or two scheduled flights on a single day.

E.        All of the airplanes scheduled for the canceled flights are based at the same airport.

 

参考答案：A 采用取非法。

思路：否定More than one or two airplanes were scheduled for the nine canceled flights.将削弱作者的结论。

注解和答案都贴上来了,可我还是没想明白

高人指点一下吧

addy

一般来说,一架飞机是指定飞一个航程的,如果这个航程取消,那么一般是指定的那架飞机出了问题.S航空公司通常每天不会有超过一个或两个有飞机机械问题的航程(说明一天内不会有超过两架飞机出问题),而现在一下子一天内取消了9个航程,要不就是指定了同一架或两袈飞机一天内飞几个航程,而这飞机刚好出机械故障了,要不不就是有其他问题出现,而A明显将第一个可能性排除了

[此贴子已经被作者于2007-7-20 13:14:03编辑过]

Amyfly

scheduled flights 原来指的是航班啊!我以为是飞机呢...晕了 半天也没搞明白!

非常感谢addy MM啊

gracezz

那A的意思翻译出来, 超过一个或两个以上的飞机被指定飞这九个航线

与指定了同一架或两袈飞机一天内飞几个航程

好像不一样啊

混乱思维

这种题经常是我犯错误的地方，BCDE项都是明显的无关项，只有A,用取非的方式最能解释二楼的说法。逻辑里最头疼的就是取非了，因为我们都不习惯在句子前面加个NO.