问题:中低压泵水罐消防车低压扬程为,流量,中压扬程为2.0MPa,流量20/s。( )
A.扬程为1.2MPa,流量40/s
B.扬程为1.0MPa,流量45/s
C.扬程为1.1MPa,流量40/s
D.扬程为1.0MPa,流量40/s
请帮忙给出正确答案和分析,谢谢!