单选题:设α={1,1,1},β={1,2,0},则下列结论中哪一个正确?(  )

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题目内容:

设α={1,1,1},β={1,2,0},则下列结论中哪一个正确?(  ) A.α与β平行
B.α与β垂直
C.α·β=3
D.α×β={2,-1,-1)

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