单项选择题
A.α-Fe,铝 B.α-Fe,铬 C.γ-Fe,铝 D.γ-Fe,铬
A.α-Fe,铜 B.α-Fe,钒 C.γ-Fe,铜 D.γ-Fe,钒
A.Ⅲ+Ⅴ+Ⅵ B.Ⅱ+Ⅳ+Ⅴ+Ⅵ C.Ⅵ D.Ⅱ+Ⅲ+Ⅴ