太原理工大学
第一章单元测试
  1. Let , ,the expression of equals( ).

  2. A: B: C: D:
    答案:
  3. Suppose that  U=R,A= , then ( ).


  4. A: B: C: D:
    答案:
  5. All proper subsets of A= are ( )

  6. A: B: C: D:
    答案:
  7. We know that A is a set of odd numbers, B is a set of even numbers, and Z is a set of integer numbers. Then =( ).

  8. A: B:Z C:B D:A
    答案:
  9. Judge which expression is correct ( ).

  10. A: B: C: D:
    答案:
  11. If a>b ,then a-c>b-c .( )


  12. A:对 B:错
    答案:对
  13. If a=2- , , ,then ( ).


  14. A: B: C: D:
    答案:
  15. If , , , ,then ( )

  16. A: B: C: D:
    答案:
  17. If  a<b<0 ,c>0 ,then ( )


  18. A: B: C: D:
    答案:
  19. Suppose that  30<x<42 ,16<y<24 ,then the range of values of is ( ).


  20. A:(-6,10) B:(-18,-2) C:(-6,-2) D:(-18,10)
    答案:(-18,10)

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