不等式x2+2x+c<0的解集是{x|m<x<1},则m=______,c=__

题型:填空题

问题:

不等式x2+2x+c<0的解集是{x|m<x<1},则m=______,c=______.

考点:一元二次不等式及其解法
题型:填空题

阅读理解。

     We are already familiar with computers-computers work for us at home, in offices and in factories.

But it is also true that many children today are using computers at schools before they can write. What

does this mean for the future? Are these children lucky or not?

     Many people who do not know about computers think of them as machines that children play with.

They worry that children do not learn from experience but just from pressing a button and that this is not

good for them. They think that children are growing not knowing about the real world.    

     But people who understand more about computers say that computers can be very good for children.

A computer can help them to learn about the real world more quickly, to learn what they want to 1earn

and think for themselves. And for the future, don't we need people who can think clearly, who know

how to get information quickly and use it well? What do you think?

1. "To be familiar with" means to _____.           

A. know nothing    

B. know about    

C. dislike     

D. like

2. Does everyone think computers are good for children?        

A. Yes, they do.   

B. No, not everyone thinks do.  

C. They don't know. 

D. They are not sure.

3. Does the writer think computer is a good thing?        

A. It isn't mentioned    

B. No, he doesn't think so.  

C. He doesn't know  

D. Yes, he does.

题型:填空题

信息认证是信息安全的一个重要方面,下列哪一项不属于实施信息认证的方法______。

A.身份识别

B.密钥管理

C.数字签名

D.消息认证

题型:填空题

-----Do you have enough to __________ all your daily expenses?

-----Oh, yes, enough and to spare.

A.offer

B.spend

C.fill

D.cover

题型:填空题

针对于社区内的环境和设施问题,社会工作者应采取( )策略。

A.社区教育
B.提供服务和发展资源
C.促进居民之间的交流
D.社区参与

题型:填空题

随着上海、广东、天津和福建等四个自贸区的相继建立以及自贸区在东部地区的继续扩大,()将在对外开放、推进创新驱动发展以及综合配套改革等方面继续引领全国。

A.东北地区

B.东部地区

C.西部地区

D.中部地区

更多题库