If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.<br>A:low compression<br>B:failure of the fuel pump to discharge fuel<br>C:incorrect timing of fuel pump<br>D:turning gear being still on

If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.
A:low compression
B:failure of the fuel pump to discharge fuel
C:incorrect timing of fuel pump
D:turning gear being still on

出自：海船船员证

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