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问题

"Scavenging" on a diesel engine means _____.A.injecting fuel oil into a cylinderB.removing


"Scavenging" on a diesel engine means _____.

A.injecting fuel oil into a cylinder

B.removing exhaust gases from the cylinder

C.forcing air into the cylinders under pressure after the exhaust valve has dosed

D.a combination of all the above

请帮忙给出正确答案和分析,谢谢!

参考答案
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