问题 单项选择题

某建筑工程建筑面积200000m2,混凝土现浇结构,筏板基础,地下3层,地上13层,基础埋深13m。基坑开挖后进行验槽,并对基地进行钎探。

大体积混凝土分层连续浇筑时,振捣棒应插入下层( ),以消除两层间的接缝。

A.50mm

B.40mm

C.30mm

D.20mm

答案

参考答案:A

阅读理解

Who is reading your blogs or checking out your information online? Two reports show that surfing the Internet and sending personal information to people you do not know could be a problem.

Most sites give users their own webspace where they can write their diaries or post their pictures. The sites encourage users to get their friends to look at their work and to comment(评论)on what are posted on the sites.

Teachers are worried that some children are posting their personal information on websites. This could put them at risk from those who plan to do harm to young people. Teachers are also worried some users think it is OK to use the websites in a way that could get others into trouble.

In a school in Illinois(伊利诺斯州)in the US where some popular sites are used wildly, the school would punish(惩罚)students who posted pictures or information about smoking , drinking and other illegal(违法的)activities on the websites.

The school is now going to encourage its 3,200 students to obey a new rule. The warning is clear. That is, be careful when posting information about yourself such as your age, sex, address and interests on a website that anyone can see.

Another warning about the Internet comes from a report. It shows searchers are leading users to websites that show them spam(垃圾短信)and other dangerous downloads.The words “ free screen savers” were found to be the most dangerous words that people search for.

It is well-known that visiting sites offering free MP3s leave users at serious risk. Spyware(监控软件)should be installed on their computers. So, happy surfing ,but remember not to get caught in the Net!

小题1:What kinds of pictures or information are not allowed on the websites in a school in Illinois?

A.Smoking , drinking and exercising.

B.Drinking, fighting and playing.

C.Smoking, drinking and fighting.

D.Chatting, watching and smoking.小题2:What does the underlined phrase “screen savers” in the sixth paragraph mean?

A.The program of hurting screens.

B.The program of protecting screens

C.The program of using screens less.

D.The person who uses screens less.小题3:How do the users avoid the danger of downloading information?

A.By using spyware.

B.By not going online.

C.By getting others into trouble.

D.By being happy.小题4:What’s the best title of this passage?

A.Happy but safe surfing.

B.Don’t comment on the Internet.

C.Warning about downloads.

D.Activities on the websites.

名词解释