文档介绍：Unit 3
Communicating with Data
1
Contents
Teaching Objectives
Revision
Pre-reading Activities
While-reading Activities
New words and phrases
anization
Text and translation
Post-reading Activities
Further Development of the Theme-related Specialized Knowledge
Assignments
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Teaching Objectives
know the transmission media of data signals, the structure of full-duplex
data transmission system and its operation and the coding of data signals;
2. to understand the main idea anization of the text;
master some important new words, phrases and their usages, especially the theme-related terms and expressions in the text;
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3
Revision
Teacher uses the following exercise to help the students to revise the important expressions or phrases or sentences which were learnt in the study of last unit.
Teacher : When I say a phrase or an expression in Chinese, you respond by giving an English equivalent your learnt in the study of Unit 2 Asynchronous Serial Data Transmission.
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4
Revision
Teacher ( Chinese ) Students ( English)
串行接口 serial interface
数据链路 data link
数据流 data stream
字符间 intercharacter
闲置状态 idle state
空号电平 space level
起始位 start bit
奇偶校验位 parity bit
错误标志 error flag
起源于 have one’s origin in
按照惯例 by convention
被称为 be referred to as
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Pre-reading Activities
1.       Ask the Ss the following two questions related to the theme of the text:
1)        Human being has experienced many ages in his history of more than one million years. We usually define these ages by the typical production tools of them such as Stone Age, Bronze Age, Iron Age , Steam Age, Nuclear Age and so on.. Can you use one word to define the age in which we are living?
Possible answers: Industrialized Age, Post-industrialized Age, Information Age, Digital Age, etc.
2)        Why do you and some other people call our age Digital Age?
Possible answers: Digital machines including digital TV, pone, camera ,etc, are more and more widely used in our life and more and more