A.140 B.150 C.160 D.170
A.75 B.150 C.170 D.220
A.全部责任故障主要责任故障 B.重要责任故障次要责任故障 C.责任故障和非责任故障 D.主要责任故障和次要责任故障
A.2 B.3 C.2.5 D.4
A.一根心轨 B.两根心轨 C.一根尖轨 D.两根尖轨
