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A.0或3 B.-1或3 C.0或-1 D.0
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A.5或7 B.3或5
C.7或-1 D.3或-1
A.{x|-<x≤0或1≤x<}?
B.{x|x≤0或x≥1}?
C.{x|-<x<}?
D.{x|x≤-或x≥}