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【单选题】

大多数和商用飞机使用涡扇发动机

A.
Most military and commercial aircraft is equipped with turbo-fan engines
B.
Most freighter and commercial aircraft is equipped with propeller engine
C.
Most freighter and commercial aircraft is equipped with turbo-fan engines
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参考答案:
参考解析:
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举一反三

【单选题】所有汽缸排成一列的发动机称为:

A.
L型发动机
B.
V型发动机
C.
H型发动机
D.
W型发动机