男性，64岁。近1年来每天午睡或夜间22点发生胸骨后压迫性疼痛，每次持续10分钟，坐

一台仪表在其规定的参比工作条件下使用时所产生的误差称为该表的（）误差。

A、基本

B、附加

C、系统

D、随机

已知f（x）是定义在R上的奇函数，当x≥0时，f（x）=a^x-1．其中a＞0且a≠1．

（1）求f（2）+f（-2）的值；

（2）求f（x）的解析式．

小剂量肾上腺皮质激素补充治疗用于：

A．过敏性休克

B．湿疹

C．重症心功能不

D．肾病综合征

E．慢性肾上腺皮质功能不全

阅读理解。

     A new generation addiction is quickly spreading all over the world.Weboholism,a twentieth

century disease,affects people from different ages.They surf the net,use email and speak in chat

rooms.They spend many hours on the computer,and it becomes a compulsive habit.They cannot

stop,and it affects their lives.

     Ten years ago,no one thought that using computers could become compulsive behavior that

could affect the social and physical life of computer users.This obsessional behavior has

affected teenagers and college students.They are likely to log on computers and spend long

hours at different websites.

     They become hooked on computers and gradually their social and school life is affected

by this situation.They spend all free time surfing and don't concentrate on homework,so this

addiction influences their grades and success at school.Because they can find everything on

the websites,they hang out there.Moreover,this addiction to websites influences their social life.   

     They spend more time in front of computers than with their friends.The relation with their

friends changes.The virtual life becomes more important than their real life.They have a new

language that they speak in the chat rooms and it causes cultural changes in society.

     Because of the change in their behavior,they begin to isolate themselves from the society

and live with their virtual friends.They share their emotions and feelings with friends who they

have never met in their life.Although they feel confident on the computer,they are not confident

with real live friends they have known all their life.It is a problem for the future.This addictive

behavior is beginning to affect all the world.

1．The main idea of the passage is about________.

A．the cause of weboholism

B．the advantage of weboholism

C．the popularity of weboholism

D．the influence of weboholism

2．The underlined word“obsessional”in the second paragraph most probably means“________”．

A．attractive      

B．addictive

C．professional              

D．potential

3．We can infer from the passage that________.

A．weboholism has the greatest effect on teenagers

B．students can hardly balance real and virtual life

C．people are addicted to games on the Internet

D．virtual life is more vivid and attractive anyway

4．Which of the following is NOT true of weboholism?

A．It contributes to the development of the web.

B．The chat room language may change social culture.

C．The problem will be getting more and more serious later.

D．People addicted to the web often become inactive in real life.

5．The author's attitude towards weboholism is that of being________.

A．optimistic          

B．positive

C．oppositive          

D．acceptable

讨论和决定重大问题是党的全国代表会议的职权之一。