A.0.05,0.5 B.0.1,10 C.0.05,1.0 D.0.1,0.5
A.含酸達(dá)1% B.PH≤1 C.PH≤2 D.PH≤3
A.0.01,0.1 B.0.020.2 C.0.1,0.01 D.0.2,0.02