A.0.05,0.5 B.0.1,1.0 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.0.02,0.2 C.0.1,0.01 D.0.2,0.02