A.1 | B.0 | C.-2 | D.-3 |
A.{0,1,2} | B.{0,1,3} |
C.{0,2,3} | D.{1,2,3} |
A.{x|x≥0} | B.{x|0<x≤1} |
C.{x|1<x≤2} | D.{x|x>2} |
A.(0,1),(1,2) | B.{(0,1),(1,2)} |
C.{y|y=1或y=2} | D.{y|y≥1} |
A.(,) | B.(-∞,)∪[,+∞) |
C.[0,] | D.(-∞,0]∪[,+∞) |
A.[2,+∞) | B.[2,3)∪(3,+∞) |
C.(1,+∞) | D.[1,3)∪(3,+∞) |
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