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
A.HCl B.(1+1)HNO3-HClO4 C.(1+1)HCl-H3PO4 D.HClO4