When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）<br>A:suction stroke<br>B:compression stroke<br>C:power stroke<br>D:exhaust stroke

When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）
A:suction stroke
B:compression stroke
C:power stroke
D:exhaust stroke

出自：海船船员证

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