Air transport companies use different planes__________.
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Air transport companies use different planes__________. 查看材料
A.in the development of air transportation
B.the earliest passenger flights were successfully operated
C.to make travel easy and pleasant for the passengers
D.to provide different services
E.the shortage of qualified pilots
F.traveling by air was very cheap
请帮忙给出正确答案和分析，谢谢！
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正确答案：正确A
【答案】A【解析】根据第一段可知，航空公司利用飞机运输旅客，货物和邮政。运营的飞机从单引擎到大型多引擎飞机。A为“在不同运输发展阶段使用不同飞机”符合逻辑和题意。因此，本题选A。