A.0.1%
B.0.2%
C.0.3%
D.0.4%
A.0.1%
B.0.2%
C.0.3%
D.0.4%
A.0.3%
B.0.4%
C.0.5%
D.0.6%
A.0.2%
B.0.3%
C.0.35%
D.0.4%
A.防止积水
B.增加排水量
C.保证排水流畅
D.减少成本
A.管底纵坡不应超过0.2%
B.管底纵坡应不小于0.2%
C.管底纵坡应为0.1%
D.管底纵坡应在0.2%至0.3%之间
A.渗水坑
B.边沟、截水沟和集水井
C.地下排水系统
D.雨水泵站
A.90%
B.93%
C.95%
D.97%
A.75
B.80
C.85
D.90
A.0.1%
B.0.3%
C.0.5%
D.0.7%