A.曲线长度增大而增大
B.曲线半径的减小而增大
C.曲线半径的增大而增大
D.曲线转角的增大而增大

A.R＜250m
B.R≤250m
C.R＜300m
D.R≤300m

A.75kg/m
B.60kg/m
C.50kg/m
D.43kg/m

A.特重型
B.重型
C.次重型
D.中型

A.30mm
B.50mm
C.60mm
D.15mm

A.30mm
B.50mm
C.60mm
D.15mm

A.±0.3mm
B.±0.5mm
C.±1mm
D.±1.5mm

A.0.3mm
B.0.5mm
C.1mm
D.1.5mm

A.0.3mm
B.0.5mm
C.1mm
D.1.5mm

A.0.3mm
B.0.5mm
C.1mm
D.1.5mm

A.站线
B.次要正线及到发线
C.正线
D.岔线