单选题The process of scavenging a two-stroke/cycle diesel engine serves to（）Aimprove fuel flow volumeBcool the exhaust valvesCreduce the intake air charge densityDincrease the temperature of exhaust gases
单选题
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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