A.4%
B.6%
C.8%
D.10%
A.4%
B.6%
C.8%
D.10%
A.4%
B.6%
C.8%
D.10%
A.3%
B.5%
C.6%
D.8%
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.2%
B.3%
C.3.5%
D.4%
A.3%
B.5%
C.7%
D.9%
A.4%
B.6%
C.8%
D.10%
A.1%至2%
B.2.5%至3.5%
C.2%至3%
D.3%至4%
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