
A.
B.
C.
D.
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)
[单选题]A.(2,0,0)B.(1,1,-1)C.(1,0,-1)D.(0,0,0)