The process of scavenging a two-stroke/cycle diesel engine serves to（）<br>A:improve fuel flow volume<br>B:cool the exhaust valves<br>C:reduce the intake air charge density<br>D:increase the temperature of exhaust gases

The process of scavenging a two-stroke/cycle diesel engine serves to（）
A:improve fuel flow volume
B:cool the exhaust valves
C:reduce the intake air charge density
D:increase the temperature of exhaust gases

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