A.3%
B.5%
C.7%
D.9%
A.3%
B.5%
C.7%
D.9%
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.4
C.5
D.6
A.5%
B.7%
C.8%
D.10%
A.4%
B.5%
C.6%
D.10%
A.3
B.4
C.5
D.6
A.3.0米
B.3.25米
C.3.5米
D.4.0米
A.3%
B.5%
C.6%
D.8%
A.5%
B.6%
C.7%
D.8%