A.最佳車(chē)速 B.設(shè)計(jì)車(chē)速 C.運(yùn)行車(chē)速 D.實(shí)際車(chē)速
A.CBA B.CDA C.CAD D.DAC
A.-12 B.-24 C.-48 D.-60
A.3.4m~3.7m B.2.4m~2.7m C.1.4m~1.7m D.0.4m~0.7m
A.2倍 B.4倍 C.6倍 D.8倍