A．刀叉 B．勺子 C．筷子

阅读理解。

　　A computer is a machine.  Many people use computers to help them do better work.  But sometimes

people send computer viruses(病毒) to computers. A computer virus is a set of bad instructions written

just to hurt computers.

　　Someone makes the virus and sends it to other computers. It is set (被设置) to turn on by itself.  

When it does, many computers around the world begin to have problems.

When the virus is turned on, it makes the computer do things it is not supposed to do. A lot of useless

information starts getting into the computers. Sometimes people lose things that are very important because

of viruses.

　　People have to turn off their computers. Others stop their computers so that they won't get hurt. by 

other computers. The virus is spread(传播)when people send information to others. Once in the computer,

it. Tells the computer to do bad things.

1. People use computers because _____.

A. computers are easy to use

B. everyone has to buy one

C. computers help people do better work

D. computers are interesting

2. What is a computer virus?

A. It's something that a person gets.

B. It's a program that hurts computers.

C. It's a bad letter that. is sent to people.

D. kind a kind of useful information.

3. What happens when a virus gets into a computer?

A. The computer turn on and off .

B. Useless information starts getting into it.

C. It can make the computer work well.

D. It can spread much good information.

4.  Why do some people have to turn off their computers?

A. They don't want to send e-mails.

B. They don't want to get sick.

C. They don't want to get a computer virus.

D. They want to make the computer turn on by itself.

5. What's the best title for the passage?

A. Computer Viruses      

B. A New Project

C. Modern Computers      

D. Computers and Information

下面关于会计账簿的更换叙述正确的有（）。

A.新账簿建立登记完毕，要进行账账核对，并要与上年度财务报表的所有数据资料完全核对一致

B.在建立新账前，要对原有各种账簿的账户进行结账、注明"结转下年余额"

C.建立新账时，在新账簿扉页要填写单位名称、开始启用日期、页数、账簿目录等，并由记账人员签章

D.固定资产明细账或租入固定资产登记簿等备查账簿可以跨年度使用，不必每年更换一次

主权是主权国家最重要的构成要素，因为主权是

A．人民当家作主的权力

B．国家综合国力的决定因素

C．主权国家的生命和灵魂

D．国家权力的中心

.

A． .

B． .

C． .

D．.

钢筋成形和安装时，梁、柱、桩的保护层厚度偏差为±5，而检验方法是采用直尺量。（）