单选题Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.AchargingBsuper chargingCscavengingDexhausting
单选题
Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.
A
charging
B
super charging
C
scavenging
D
exhausting
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