A.{(1,1),(-1,1)} | B.{1} | C.[0,1] | D.[0,
|
2 |
2 |
2 |
2 |
2 |
A.{1,2} | B.{1,3} | C.{2,3} | D.{1,2,3} |
A.[0,1] | B.(0,1] | C.(-∞,0] | D.以上都不对 |
A.{0,1} | B.{-1,0,1} | C.{0,1,2} | D.{-1,0,1,2} |
A.[1,2) | B.[1,2] | C.(2,3] | D.[2,3] |
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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