确诊早期骨、关节结核的可靠依据（）。 A.临床表现 B.手术探查及活组织检查 C.X

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

中 * * 政治局常委、国务院 * * 李克强说：“积累问题是一个长期过程，解决问题也需要一个长期过程，但我们必须有所作为!”。这句话体现的哲理是

①量变和质变是事物发展过程中两种不同的状态

②事物的变化发展总是从量变开始的，变化发展实质是量变

③要积极做好量的积累，为实现事物的质变创造条件

④在量的积累已经达到一定程度时，要抓住时机促成质变

A．①②

B．①③

C．②③

D．③④

焦炭在炉内的作用为发热剂、还原剂、（）。

某县小学在2002年7月10日经批准，以划拨方式取得一宗国有土地使用权，用途为教育用地，随后该校向县土地登记部门提出申请，要求办理土地登记。
问题
1．该土地应办理什么登记申请人应是谁
2．该小学应在何时办理土地使用权设定登记
3．该小学在申请登记该宗土地时应提交哪些登记资料
4．划拨土地使用权设定登记权属审核的要点有哪些

货运发票是可以用来进行增值进项税抵扣的有效单证。( )