某管网设有对置水塔,当管网用水最高时,泵站供水量为90L/s,节点流量如下图所示,则水塔到节点1的管段t-1的流量qt-1为()L/s。
A.30 B.40 C.50 D.60
A.48s-1 B.40s-1 C.36s-1 D.20s-1
A.441.2 B.440 C.452.3 D.521.6
A.10.5 B.10.0 C.10.8 D.10.6
A.250 B.300 C.350 D.400
A.1.57:1 B.2:1 C.3:1 D.1.18:1
A.1.8% B.1.9% C.2.0% D.2.1%
A.6240 B.6050 C.5892 D.4657
A.0.28 B.0.16 C.0.35 D.0.31
A.1.20 B.1.93 C.2.08 D.1.59
A.0.84 B.0.94 C.1.04 D.1.26
A.23.9 B.20 C.13 D.25
A.100 B.80 C.60 D.40