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If the engine does start on air, but combustion does not immediately begin, the cause may be （）.

A、failure of the fuel pumps

B、starting air pressure too low

C、stop valve in air line closed

D、the turning gear still engaged

时间：2022-01-04 00:00 关键词： 船舶动力装置 海船船员考试

答案解析

D