Before being shut down a diesel engine should idle a few minutes in order to _.A.prevent

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Before being shut down, a diesel engine should idle a few minutes in order to _.

A.prevent governor surging at shutdown

B.make sure the fuel nozzles are flushed clean

C.prevent pressure buildup in the fuel lines

D.prevent damage from localized overheating

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗