A.(2,0,0) B.(1,1,-1) C.(1,0,-1) D.(0,

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问题 A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)

选项 A.(2,0,0)
B.(1,1,-1)
C.(1,0,-1)
D.(0,0,0)

答案 B

解析
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