A.20~25 B.15~20 C.10~15 D.25~30
汽車(chē)在曲線上行駛時(shí)穩(wěn)定性的條件()
A.A B.B C.C D.D
A.沖突點(diǎn) B.會(huì)合點(diǎn) C.分叉點(diǎn) D.交叉點(diǎn)