There is nothing more I can try            you to stay, so I wish you good luch.

A．being persuaded

B．persuading

C．to be persuaded

D．to persuade

能大量共存且形成无色溶液的一组离子是（　　）

A．Cu²⁺、SO₄^2-、H⁺

B．CI^-、NH₄+、OH^-

C．Ba²⁺、SO₄^2-、NO₃^-

D．Na⁺、K⁺、NO₃^-