单选题When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）Aincrease in temperatureBlose its energy partlyCexpand and do workDbegin to be compressed
单选题
When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）
A
increase in temperature
B
lose its energy partly
C
expand and do work
D
begin to be compressed
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