单选题The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as（）.Aignition ratioBpower ratioCcompression ratioDinjection ratio
单选题
The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as（）.
A
ignition ratio
B
power ratio
C
compression ratio
D
injection ratio
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