A.±10mm
B.±20mm
C.±30mm
D.±40mm

A.5～10mm
B.10～20mm
C.20～30mm
D.30～40mm

A.自动闭塞分区区段内的钢轨必须导电，而相邻分区区段的钢轨必须绝缘
B.为防止钢轨漏电，钢轨与混凝土枕之间必须绝缘
C.两股钢轨之间不能短路，以避免道床顶面与轨底相接触，预防潮温时漏电
D.轨距杆、连接杆及通长垫板等可以不设绝缘装置

A.齿轮传动 
B.斜齿圆柱齿轮传动 
C.螺旋齿轮传动 
D.人字齿圆柱齿轮传动

A.4200mm
B.4400mm
C.4800mm
D.5000mm

A.4200mm
B.4400mm
C.4600mm
D.5000mm

A.直齿圆柱齿轮传动
B.斜齿圆柱齿轮传动
C.螺旋齿轮传动
D.人字齿圆柱齿轮传动

A.4200mm
B.4400mm
C.5000mm
D.4000mm

A.200mm
B.300mm
C.350mm
D.1100mm

A.200mm
B.300mm
C.350mm
D.1250mm

A.200mm
B.300mm
C.350mm
D.1250mm