下列变化需要加入氧化剂才能完成的是（） A .Fe3+→Fe2+ B.CO

下列变化需要加入氧化剂才能完成的是（）

A .Fe³⁺→Fe²⁺ B.CO₃^2-→CO₂ C.SO₃^2-→SO₄^2- D.MnO₄^-→Mn²⁺

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下列变化需要加入氧化剂才能完成的是（ ） A .Fe3+→Fe2+ B.CO

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下列变化需要加入氧化剂才能完成的是（） A .Fe3+→Fe2+ B.CO