FEIFEI逻辑23题？帮忙看看呢；叩谢拉

lanyuqi

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 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.

 

我现在真的是逻辑思维混乱了，请NN们给讲讲吧◎叩谢拉

lanyuqi

mengyuan

问题时什么呢？

liubin1987

The argument depends on which one of the following assumptions?

这是题目.

下面是我的解释:

现象:9个航次被取消

依据:1. 一般取消航次是因为安排的飞机出现机械故障

        2. 不可能有超过一个的航次有机械问题

结论:肯定是其他原因

其中,在依据2中暗含了一个假设:不可能有几架飞机同时出现机械问题

也就是选项A了.

对A取非,也就是说这9个航次都是有一架飞机来执行,而一架飞机在一天内是完全有可能出现机械故障的.所以推不出是因为其他原因造成.

取非后结论不成立