問題詳情

20. For an ordinary four-stroke diesel engine, the intake valve is closed .
(A) afterTDC (Top Dead Center)
(B) before TDC (Top Dead Center)
(C) after BDC (Bottom Dead Center)
(D) before BDC (Bottom Dead Center)

參考答案

答案:C
難度:適中0.666667
統計:A(2),B(3),C(12),D(1),E(0)

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