A.5%
B.6%
C.7%
D.8%
A.5%
B.6%
C.7%
D.8%
A.3%
B.4%
C.5%
D.6%
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.4%
B.5%
C.6%
D.7%
A.4%
B.6%
C.8%
D.10%
A.4%
B.5%
C.6%
D.10%
A.4%
B.6%
C.8%
D.10%
A.3.0%
B.4.0%
C.5.0%
D.6.0%