问题 问答题 简答题

简述信息网络的业务特点?

答案

参考答案:

随着科学技术的发展,电信业务从早期的电报、电话发展到数据、图形、图像、动画等多媒体信息的传送。由于信息多媒体化导致新一代业务传送具有与传统业务不同的传输特性。

(1)各种业务信息的传输要求具有不同的速率

(2)各种业务信息的传输要求具有不同的突发性

(3)各种业务信息的传输具有不同的误差要求;

(4)各种业务信息的传输具有不同的延时要求

(5)各种业务信息的传输具有不同的抖动要求。

综上所述,不同的通信业务具有不同的特点,因而在网络发展过程中形成了不同的交换技术。

阅读理解

阅读短文,选择答案。

     When we get help from others, we say "Thank you". So "Thank you" is very popular among us Chinese

  students. But is it as popular in the UK?

     The answer is "no". Here is a recent survey in the newspaper. "Thank you" is only the 20th most

 popular way of showing gratitude (感激) in the UK.

     The survey shows that British people like "Cheers" most. For example, when friends invite each other

 for a drink after a game, a smile and a "Cheers" may be the best way to say "thanks". "Cheers" also means

  "ganbei" in Chinese.

     You may often hear the word between two good friends. "Great", "nice one" and "all right" are also

 popular ways of showing gratitude.

     Of course, there are some formal (正式的) ways to say "thanks" among British people. For example, 

 when a stranger is especially helpful, they may say "brilliant" or "much appreciated (感谢)" to show their

 gratitude.

     By the way, British people usually like to say: "You're welcome", "No problem" or "Sure" to answer "

 thank you".

     So why not try some of them to show your thanks. It could be cool!

1. Chinese students like to say _____ to show their thanks.

    A. cheers

    B. all right

    C. thanks

2. If a friend invites you for a drink after a match, the best way to show your gratitude is _____.

    A. just a smile and a "Cheers"

    B. to say "much appreciated"

    C. to invite him for a drink

3. A passer-by (过路人) helps you and shows you the way in England. You'd better say "_____".

    A. Great

    B. Much appreciated          

    C. Thank you

4. The best title of this passage is "_____".

    A. British people like "Cheers" most

    B. 'Thank you' is no longer popular

    C. It's cool to show thanks in other ways

判断题