The camshaft on a four-stroke/cycle diesel engine provides a means to operate the _____.A.

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The camshaft on a four-stroke/cycle diesel engine provides a means to operate the _____.

A.fuel injectors

B.exhaust valves

C.intake valves

D.all of the above

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