摘要:A,2.-π<α-β<0,3. ,4. B,5.D, 6. C, 7. B,8. 4,9. 3+2,易错为4,10.,11.B,12.,13. D,14. (-∞,)∪(,+∞),15.{x|x≥1或x=-3},易忽视x=-3,16.D,17.C,18. 0≤m<4,19.(,),20.a<-3,21.[0,4],22.D,23.B,24.A,25.(1, )∪(,3),26.A.
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