(10南京市3)·金属钒被誉为“合金的维生素”。五氧化二钒(V2O5)中

(10南京市3)·金属钒被誉为“合金的维生素”。五氧化二钒(V2O5)中钒元素的化合价为
A.一3B.+ 1
C.+ 3D.+5

答案

D解析:

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