A.(0,1) | B.(1,2) | C.(-2,-1) | D.(-1,0) |
1 |
3 |
2 |
3 |
A.[-2,1] | B.[3,5] | C.[-5,1]和[1,3] | D.[-2,1]和[3,5] |
A.(0,1) | B.(1,2) | C.(2,3) | D.(3,4) |
A. | B. | C. | D. |
2 |
x |
A.(1,2) | B.(2,3) | C.(3,4) | D.(4,5) |
2 |
x |
A.(1,2) | B.(2,3) | C.(3,4) | D.(4,5) |
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