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Refractory metals include niobium (Nb),（）,（）, and（）

Refractory metals include niobium (Nb),（）,（）, and（）
A.Zirconium
B.Molybdenum (Mo)
C.Tungsten (W)
D.Tantalum (Ta)
正确答案：Molybdenum (Mo)；Tungsten (W)；Tantalum (Ta)

标签：材料导论

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