A.Zn2+〉Ba2+〉Mg2+ B.Mg2+〉Ba2+〉Zn2+ C.Zn2+〉Mg2+〉Ba2+ D.Mg2+〉Zn2+〉Ba2+
A.增大 B.減小 C.不變 D.不確定
A.φCl2/Cl- B.φBr2/Br- C.φOH2/O- D.φF2/F-