airplane,flights不是一个东西吗?选A 什么 意思啊
23On 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.
the question is missing.
besides, the answer choice A is weakening the claim that "soem of the nice cancellations were probably due to something else.". If only one or two airplanes involved in the nice scheduled fights, then A weakens the conclusion.
airplane is a little bit different from "flight". for instance, my "flight" is NW1234 flying from NY to Beijing. Bob's "flight" is NW5678 flying from Beijing to NY. both flights could be the same airplane.
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