单选题Compared to a naturally aspirated diesel engine, a supercharged diesel engine has（）Aa cylinder air charge of higher pressureBincreased pumping lossesCless valve overlapDreduced blow-by
单选题
Compared to a naturally aspirated diesel engine, a supercharged diesel engine has（）
A
a cylinder air charge of higher pressure
B
increased pumping losses
C
less valve overlap
D
reduced blow-by
参考解析
解析：
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