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.
我选的是D
按费费的思路
evidence1：a cancellation is due to mechanical problems with the airplane scheduled for a certain flight
evidence2：since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day一天不可能多于1-2趟航班出现机械故障
argument：some of the nine cancellations were probably due to something else.
A选项 More than one or two airplanes were scheduled for the nine canceled flights.被取消的9趟航班被安排在多于1-2架飞机上
飞机是飞机，航班是航班，我怎么都不能把evidence和argument联系上推出assumption，是不是自己智力太低了…… | 
