Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）<br>A:a combination of constant volume and constant pressure<br>B:a combination of constant temperature and constant pressure<br>C:entirely constant pressure<br>D:entirely constant volume

Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）
A:a combination of constant volume and constant pressure
B:a combination of constant temperature and constant pressure
C:entirely constant pressure
D:entirely constant volume

出自：海船船员证

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