题目内容
(请给出正确答案)
[单选题]
允许速度为120km/h的线路,同向曲线两超高顺坡终点间直线长度,困难情况下应不短于()。
A.40m
B.45m
C.50m
D.60m
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A.40m
B.45m
C.50m
D.60m
A.+4mm,-2mm
B.5mm
C.±2mm
D.+6mm,-4mm
A.1.1~1.3
B.1.1~1.4
C.1.3~1.6
D.1.4~1.7
A.+6,-2
B.+6,-4
C.+5,-2
D.+5,-3