A.10S B.30S C.60S D.120S
A.發(fā)動機潤滑油的壓力升高 B.發(fā)動機不易爆燃 C.發(fā)動機的輸出功率增加 D.發(fā)動機零部件磨損嚴重
A.1S B.5S C.10S D.20S