第一章测试
1.Let , ,the expression of equals( ).
A: B: C: D:
答案:B
2.Suppose that  U=R,A= , then ( ).
A: B: C: D:
答案:B
3. All proper subsets of A= are ( )
A: B: C: D:
答案:A
4.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 =( ).
A: B:Z C:A D:B
答案:A
5.Judge which expression is correct ( ).
A: B: C: D:
答案:A
6.If a>b ,then a-c>b-c .( )
A:错 B:对
答案:B
7.If a=2- , , ,then ( ).
A: B: C: D:
答案:A
8.If , , , ,then ( )
A: B: C: D:
答案:C
9.If  a<b<0 ,c>0 ,then ( )
A: B: C: D:
答案:A
10.Suppose that  30<x<42 ,16<y<24 ,then the range of values of is ( ).
A:(-18,10) B:(-18,-2) C:(-6,10) D:(-6,-2)
答案:A

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