问题 单项选择题

物理层采用( )手段来实现比特传输所需的物理连接。

A.通信通道

B.网络节点

C.物理层协议规定的四种特性

D.传输差错控制

答案

参考答案:C

解析:物理层定义了为建立、维护和拆除物理链路所需要的机械的、电气的、功能的和规程的特性,其作用是使原始的数据比特流能在物理媒体上传输。具体涉及接插件的规格、“0”、“1”信号的电平表示、收发双方的仂、调等内容。

阅读理解

阅读理解。

     It is sometimes said that English is English and that there are no differences between different kinds of

English, but this is not the case. American English is in general quite different from UK English. The main

differences relate to the use of certain words and to spelling. American English is much more phonetic(与发音近似的)than UK English and in American English a 'z' or a 'c' is often used where an 's' would be

used in British English.

     Words can vary in different types of English as well. An "estate agent" in UK English is someone who

works in "real estate" in American English. British people talk of "rubbish" while the Americans call this

"garbage". The UK people have "bins", but the Americans have "dumpsters".

     The differences between these ways of using English make translating works into English a difficult

business. There are translation tools available on the Internet, but these can often translate words in a very direct way and the end result is a sentence that has lost its meaning.

    The best way of translating any written piece of work into the English language is to first decide what

kind of English you want the piece to be translated into. For example, if it is for a British market, then use

the UK English. For the best result, always use some kind of spelling and grammar checker so you can

make sure that you are using the proper terms, spelling and vocabulary.

1. Which of the following statements would the writer most probably agree with? 

A. UK English is much more phonetic than American English.

B. There are differences between different kinds of English.

C. American English is different from British English only in spelling.

D. It's easier to learn British English than to learn American English.

2. The underlined word "vary" in Paragraph 2 means "______".

A. change

B. argue

C. replace

D. compare

3. It is implied in Paragraph 3 that ______.

A. works translated into English will surely lose their meanings

B. we should never translate words into English in a direct way

C. translating works into English is not difficult

D. online translation tools are not so useful

4. What is the last paragraph mainly about?

A. The advantages of using a spelling and grammar checker.

B. The differences between British English and American English.

C. What we should do when translating something into English.

D. When we should use British English or American English.

填空题