A.4%
B.6%
C.8%
D.10%
A.4%
B.6%
C.8%
D.10%
A.4%
B.5%
C.6%
D.10%
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.100m
B.200m
C.300m
D.400m
A.3
B.4
C.5
D.6
A.5%
B.4%
C.6%
D.3%
A.3
B.4
C.5
D.6
A.4%
B.5%
C.6%
D.3%
A.1800pcu/h
B.1500pcu/h
C.2000pcu/h
D.2200pcu/h