單項選擇題屬于體心立方晶格的金屬有()

A.α-Fe,鋁
B.α-Fe,鉻
C.γ-Fe,鋁
D.γ-Fe,鉻


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1.單項選擇題屬于面心立方晶格的金屬有()

A.α-Fe,銅
B.α-Fe,釩
C.γ-Fe,銅
D.γ-Fe,釩

5.單項選擇題密排六方晶格的致密度為()

A.68%
B.74%
C.58%
D.64%