单选题In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）Aexhaust manifoldBvalve bridgeCpressure of the fresh air chargeDvalve adjusting gear
单选题
In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）
A
exhaust manifold
B
valve bridge
C
pressure of the fresh air charge
D
valve adjusting gear
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