A.4%
B.6%
C.8%
D.10%
A.4%
B.6%
C.8%
D.10%
A.可以,任何时候都可以超过
B.可以,但需要特殊设计和审批
C.不能,绝对不能超过
D.以上都不对
A.一般值为6%
B.应根据具体地形条件适当调整
C.一般值为8%
D.必须严格限制在4%以下
A.3%
B.5%
C.6%
D.8%
A.4%
B.6%
C.8%
D.10%
A.30km/h
B.40km/h
C.50-60km/h
D.70-80km/h
A.3%
B.5%
C.7%
D.9%
A.0.5%~1.5%
B.1.0%~2.0%
C.1.5%~2.5%
D.2.0%~3.0%
A.1%至2%
B.2.5%至3.5%
C.2%至3%
D.3%至4%