The common rail engines show great advantages in combustion especially（）.<br>A:at high speed and full load<br>B:at low speed and part load<br>C:when heavy fuel oil is used at sea<br>D:when the ships run long distance

The common rail engines show great advantages in combustion especially（）.
A:at high speed and full load
B:at low speed and part load
C:when heavy fuel oil is used at sea
D:when the ships run long distance

出自：海船船员证

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