feifei-23 题求助

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.

我看来看去对A都没有理解是什么意思,是指会有多于1,2驾飞机安排去补充那些取消的航班?还是指什么?麻烦xdjm帮手解释一下?谢谢

九次航班不可能都是由一驾飞机负责飞行的，如果是这样，那么所有九次航班被取消不都是由于这一价飞机的机械故障问题么？这种情况不太可能发生，因为文章中明确指出：

However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day,

喔...今早起床时突然想通了,是不是要是只是一两驾飞机出问题,而这九个航班都是由这两架飞机来飞的话, 这九个航班的cancellation 便都可以due to mechanical problems了. 因为在前提说没可能more than one or two scheduled flights on a single day是由mechanical problems造成的,所以要是多架飞机的航班被取消,不可能违反前提归属于mechanical problems,就只能说明是其它原因造成的了

谢谢 lykuang02 的解释啊,昨天我没转过弯来,呵呵

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.

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

还是很困惑阿，觉得A跟题目没有关系，除非把题目改为since it is unlikely that Swift would have the mechanical problems with more than one or two airplanes on a single day。。。

哪位帮忙解释一下？

我觉得你说的跟题目其实是一个意思的,因为一次航班是有一架飞机承担的a cancellation is due to mechanical problems with the airplane scheduled for a certain flight.,那一架飞机有问题造成一次航班取消,一天之内不会有超过2次的航班被取消也就是不会有超过2架的飞机发生故障.

一架飞机代表一次航班.

我觉得不怎么绕啊,

一架飞机一次航班,那九个航班取消,如果是飞机故障的原因而不是其它原因造成的话,那只能是不超过两架飞机来承担九个航班了,而将第一个答案取非的话是： 只有一个或两个飞机承担九个航班,那样的话造成取消的原因就只能是飞机故障而不可能是其他原因了,这样对题目就起了weaken的作用了，不知道说清楚了没有呵呵~~~