問題詳情
20.For an ordinary four-stroke diesel engine, the intake valve is closed .
(A)after TDC (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0.681818
統計：A(3),B(3),C(15),D(0),E(0)