单项选择题
A.8 B.10 C.14 D.18
A.0.49kPa<排气压力≤2.94kPa B.0.49kPa<排气压力≤4.90kPa C.0.98kPa<排气压力≤4.90kPa D.0.98kPa<排气压力≤2.94kPa
A.A B.B C.D D.F