单项选择题
Air transport industry is an area of commerce in which aircraft are employed to carry passengers, freight, and mail.
- A.空中运输业是一种以雇佣飞机来运输乘客,货物和信件的一种商业贸易。
B.空运也是商业的一个领域,它就是用飞机运送乘客,货物及邮件。
C.空运业务是贸易领域中的一项业务,它可用飞机来载人,运货物和邮件。
D.航空运输业是一个商业领域,在这个领域中用飞机运送乘客,货物和邮件。
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