2.命题:“若,(a ,b∈R),则a=b=0”的逆否命题是 ( )
A.若a≠b≠0(a , b∈R),则≠0
B.若a=b≠0(a , b∈R),则≠0
C.若a≠0且b≠0(a,b∈R),则≠0
D.若a≠0或b≠0(a,b∈R),则≠0
1.设集合A= ,集合B=则AB= ( )
A.[0,1] B. C. D.
34.-What _____dessert would he like?
-She’d like a small one.
A.kind B.kinds of C.size D.kind of
35-Oh,I have lost my CD.
-______Let’s call the lost and found first.
A.Don’t shout. B.Don’t worry. C.Forget it. D.No chance.
33.-It’s hot today. Why don’t we go swimming?
-______
A.That’s a good idea. B.It doesn’t matter.
C.I don’t, either. D.You’re welcome.
32. on the fact, the report should be reliable.
A.Basing B.To be based C.Based D.To base
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com