题目内容
(请给出正确答案)
[主观题]
The engine is started with compressed air supplied from ().
A.air bottles
B.the scavenging air receiver
C.the crankcase
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A.air bottles
B.the scavenging air receiver
C.the crankcase
第4题
A.the main engine
B.the boiler
C.the main engines and boilers
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