当前位置:在线题库搜索>[单选题]() is not properly set thus causing either advanced or retarded firing.的答案是什么?

问题:

[单选题]() is not properly set thus causing either advanced or retarded firing.

A、A piston
B、A fuel injection pump
C、A feed water pump
D、A lube oil pum

参考答案: B

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