单项选择题
The rate of pressure rise during the period following fuel ignition in a diesel will result in （）
A.valve overlap B.volumetric efficiency C.turbulence of the air change D.fuel efficiency
单项选择题 Higher than normal temperature air passing through the intake of a diesel engine will result in（）
单项选择题 Air scavenging of a diesel engine cylinder（）
单项选择题 The term diesel engine scavenging means（）
