A.1,2,3,4,5,6,7,8 B.1,2,4,8,16,32,64,128 C.2,4,6,8,10,12,14,16 D.0.001,0.01,0.1,1,10,100,1000,10000
A.螺翼式水表 B.旋翼式水表 C.電子水表 D.冷水水表
A.15 B.50 C.100 D.150