问题 多项选择题

下列有关ISL(Inter Subrack Link)的描述哪个(些)是正确的?()

A.MGW机箱之间ATM信元传送通过ISL电缆来完成,ISL分为控制链路(control link)和应用链路(application link)

B.ISL电缆可以连接主机箱(或Central Processor ModulE.与扩展机箱,也可以实现两个扩展机箱之间的互联

C.每块SCB和SXB板都可提供4个主用的ISL接口与其它机箱进行互联

D.在ISL上包含TUB产生的系统时钟和从ET板上提取出来的参考时钟

答案

参考答案:A, D

完形填空

It is widely accepted that television is playing an important part in people's lives. But, there is a heated discussion as to whether television does good or harm.

Television keeps one learning more about present events, allows one to follow the most re­cent developments in politics and science, and offers various programs which are .both instructive and exciting. The most distant countries, the strangest customs and the most attractive scenes of nature are brought right into one's room or house.

However, some people insist that television is bad rather than good. They argue that it has brought about many serious problems. The major one is its effects on young people. Children are now so used to getting their information and entertainment from television that their ability to read and write as well as physical ability has been greatly weakened. Even worse than that, vulgar( 庸俗的) advertisements and poor programs may develop their bad tastes, shape their view points badly towards human life to such a degree that their minds might be destroyed.

In a word, television has both advantages and disadvantages. Whatever effects it has, one point is certain, television in itself is neither good nor bad. It is the use to which it is put that decides its value to society.

小题1:What are people discussing nowadays?

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小题2:What are the advantages television has brought us ? (至少2点)

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小题3:Why do some people think television is bad rather than good?

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小题4:It is the use to which it is put that decides its value to society. ___________________________________

小题5:What's your opinion about television?

多项选择题