You can () it and let us know your decision later.

A. All OSPF implementations must have at le ast one interface in area 0.

B. You are attempting to run in the broadcast mode over an NBMA interface.

C. Both routers are configured to function as a BDR; therefore, there is no DR router.

D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.

E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.

阅读理解：Thank you for your interest in Calibre Cassette (盒式录音带) library. This letter tells you about our service. With it we are sending you an application form, so that you can join if you would like to try it. Calibre library aims to provide the pleasure of reading to anyone who cannot read ordinary printed books because of sight problems. We currently have over 7,000 books available for reading for pleasure, including 1,000 specially for children. All our books are recorded cover-to-cover on ordinary cassettes and can be played on any cassette players. They are sent and returned by post, free of charge

When we receive your application, we will send you a book and an information tape. They will explain how to use the service. The easy way to use Calibre library is to tell us what sorts of books you like, and we will keep you supplied with books we think you will enjoy. Or you can send us a list of books you would like to read, and we will then send you books from this list whenever possible. In that case you will need to use our website, or buy one or more of our catalogues (目录).

21. According to the first paragraph, the library sends the application form. to the readers so that they can ________.

A) read ordinary books

B) order cassette players

C) buy Calibre cassettes

D) use the library service

22. Calibre library provides service mainly for people who suffer from ________.

A) hearing difficulties

B) mental illnesses

C) sight problems

D) heart troubles

23. The service of sending and returning books by post is ________.

A) not available to children

B) paid by the users

C) free of charge

D) not provided

24. The easy way to use the library service is to ________.

A) inform. the library of your name and address

B) tell the library the sorts of books you like

C) buy the catalogues of the library

D) ask the library to buy the books

25. The main purpose of this letter is to ________.

A) introduce the library’s service to readers

B) recommend new books to the readers

C) send a few catalogues to readers

D) express thanks to the readers

Pressure Cooker (压力锅) Safety

When you are cooking with a pressure cooker, you should learn a few common sense(常识)rules:

1 . Never leave the cooker unwatched when it is in use.

2. Add sufficient liquid but never past the recommended fill point. Overfilling the colder may block the vent pipe (排气孔) and cause the cooker to explode.

3. Set the cooking time. Too much time may overcook the food or too much pressure may build up in the cooker. Too little time will lead to undercooked food.

4. If you are new to pressure cooking, follow the cooking instructions carefully. Heat and time can either result in a great meal or a ruined one.

5. Never try to force a pressure cooker cover open, Allow the cooker to cool or run it under cool water before trying to open the cover.

6. Clean the cooker thoroughly after each use . Mild detergent(洗涤剂)and hot water work the best.

Do not use stove ash or sand for they may damage the cooker. The gasket(密封圈)is best cleaned in warm soapy water and then dried. Store the gasket in the bottom of the pot.

According to the first rule, the user should______ .

A．keep the cooker under close watch

B．always keep the colder half full

C．never leave the colder empty

D．never turn off the stove

A.Not in the least

B.At least

C.In the least

D.Not at the least

Ventilation ().

A、is a system for moving fresh air

B、can cut indoor pollution to a safe level

C、can cause some diseases

D、is better done through air-conditioning

Because Web Servers are platform. and application(74)they can send or request data from legacy or external applications including databases。

A．independent

B．coupled

C．related

D．available

“A.Great Expectations

B.Pride and Prejudice

C.Jane Eyre

D.Women in Love

Because Web servers are platform. and application(71)they can send or request data from legacy or external applications including databases. All replies, once converted into(72)mark-up language, can then be transmitted to a(73). Used in this way, Intranets can(74)lower desktop support costs, easy links with legacy applications and databases and,(75)all, ease of use.

A．related

B．dependent

C．coupled

D．independent

A.No, you can

B.Yes, you are

C.No, you can’t