较常见的支气管扩张类型是（）。 A.囊状扩张 B.柱状扩张 C.囊状、柱状均有 D.

患者，女，50岁，确诊为宫颈癌，拟行经腹子宫全切术，术前准备措施中，不必要的是（）。

A.做好心理护理

B.观察生命体征

C.术前3天进无渣流质饮食

D.术前3天每天 * * 冲洗1次

E.手术日按时给术前用药

“十一五”时期，西部地区商品良种覆盖率平均增长( )个百分点左右。

A．18

B．21

C．15

D．20

阅读理解。

     You've probably heard a lot about the Internet, but what is it?

     The Internet is a computer network that uses the telephone system to connect together millions of

computers around the world.

     Maybe that isn't very exciting but once you're connected to the Internet, there are lots and lots of

different things you can do. You can send electronic messages or "e-mails" to your friends (as long as

they're on the Internet, too), or you can sort through all kinds of information on something called the

World Wide Web.

     You don't need to know how the Internet works in order to use it, but if you understand the basics,

it may help you work out any technical problems you have - and of course you can help your friends

with your knowledge!

     You may think that your telephone is just for talking. But as long as you have the equipment (设备),

you can use a telephone line to send computer data (数据) as well as sounds. If you connect your

computer with the telephone system, it can receive information from and to other computers (as long as

they are connected with the telephone system, too).

     Because there is not an organization which operates the Internet, no one exactly knows how many

people are connected to it. It's thought that there could be 60 million people on the Net, connected up to

over 15 million computers! et

1. If you want to link your PC with the Internet, you need, first of all, to ______.

A. learn how to operate a computer

B. know how to make a telephone call

C. have a telephone

D. learn how to type on a computer

2. You can keep in touch with your friends by e-mail. The condition is that _______.

A. they also have their own telephones

B. they also have their own computers

C. you have already known their telephone numbers

D. they are also connected to the Internet

3. According to the writer, it's better to _______.

A. know how to work out technical problems besides using the Internet

B. use the Internet besides working out technical problems

C. sort through all kinds of information on the World Wide Web

D. help your friends connect their PCs with the Intern

据地下水埋藏条件，可将地下水分为（）、（）和（）。

定影液的组成不包括

A．坚膜剂
B．保护剂
C．抑制剂
D．中和剂
E．定影剂