問題詳情

6. If the ______ occurs due to the wears of piston rings and cylinder liner, a gradually risingpressure in the crankcase of trunk-piston engine could appear.
(A) blow-by
(B) engine knocking
(C) vibration
(D) loud sound

參考答案

答案:A
難度:適中0.5
書單:沒有書單,新增

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