地西泮的作用机制（） A.能促进大脑皮质细胞代谢 B.阻断5-HT在神经末梢的再摄取

下列关于《中华民国临时约法》内容的表述，正确的有

A．采用责任内阁制

B．实行三权分立的原则

C．规定人民享有广泛的权利

D．确立了资产阶级民主共和国的政治体制和国家制度

下列各项中，不属于诊断病毒性心肌炎的主要指标的是（）.

A.急慢性心功能不全或心脑综合征

B.多汗、肌痛、胸闷

C.有心脏扩大或心包炎表现

D.心电图中见明显心律失常

E.心脏放射性核素扫描发现心室扩大

吸烟、吸毒、酗酒对人体健康有那些危害？

_____ the great teacher Zhang Lili was in hospital, many people hoped she would get better soon.  [ ]

A. If            

B. Until          

C. Before          

D. After

I am an e-mail user．When I first started to use the e-mail system. I used to read all my e-mail．I didn’t have much mail．1 was very excited about receiving any e-mail．I gave my friends my e-mail address．Soon I had more mail than 1 wanted．Some of the mail was junk mail．1 was worried．I didn't want my mail to control me．

I've tried some methods to help me get control of my mail．First，I check my mail at the same time every day．Also I try to allow myself only 15-20 minutes every day to process my e-mail．This doesn't always work，but I try．Sometimes I save the messages．Sometimes I just read them，maybe answer a few，and then delete them．Sometimes I'm not at all interested in a message，so I don't even open it．I delete it right away．This is very much the way I go through the mail that the postal service delivers to my home．

These methods are very simple．I have some friends who are very clever with computers．From time to time，they teach me new tricks for managing my e-mail．I've also learned to transfer(转存)some messages to a disk so they don't fill up my mail files(文件夹)．Then I can read them later and maybe use them in my work．I'm still amazed at what e-mail can do for me! I'm still worried，however，about having too much to read．

小题1:The writer used to read all his e-mail because __________.

A．he didn’t have much mail

B．he had nothing else to do

C．he didn’t know how to read mail

D．he was forced to do that小题2:Which of the following does NOT belong to the ways of the writer’s dealing with his mail?

A．Saving the message

B．Just reading more

C．Deleting some

D．Passing some into friends小题3:What does the underlined word “they” in the last paragraph refer to?

A．messages

B．friends

C．computers

D．methods小题4:What’s the purpose of the writer to write this passage?

A．To share happiness in using mail with us

B．To share some worries in using mail with us

C．To share some methods of using computer with us

D．To persuade us out of using mail