求教FEIFEI-23

lizishao

求教FEIFEI-23

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.

正确答案是A, 但题目说it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, 所以我觉的假设应该是SWIFT至少有5辆飞机, 才能满足. 但A说More than one or two airplanes were scheduled for the nine canceled flights, 所以不解, 请赐教.