I单项选择 1.抽样频率 a. sampling rate b. repetition rate c. sampling frequency 答案:c 2.数字通信 a. digital communication b. digital transmission. transmission path 答案:a

principle[ pr i nsi pI]n.原理 be dependent on依赖,取决于 sample['samp1]vt..样;样值 quantize[ k won t z]v.量化,分层 ode[koud]v.编码;n.码 scheme[ski:m]n.方案,设计,安排 describe[dis'\ k r ai b]vt.叙述,描述 description叙述,描述

1. to know Cellular Mobile Telephone System Teaching 2. to understand the construction of cellular mobile telephone system Objectives

I. Revision Teacher uses the following exercise to help the students to revise the important expressions or phrases or sentences which were learnt in the loud speaker, study of last unit eacher: When I say a phrase or an expression in Chinese, you respond by blackboard

1. Detailed analysis of difficult sentences in the text; 2. the usages of pastparticiple phrases; 3. Affix: inter-, multi

I. Revision mins com Teacher uses the following exercise to help the students to revise the important expressions or phrases

1. what have we learned in the Unit projector, Possible answers: cellular Mobile Telephone System 2. What is cellular Mobile Telephone System? loud speaker Possible answers: to reuse the allocated frequency band in different geographic locations blackboard

1.to know the development of switching techniques Teaching 2.to understand the main ideas of the text Objectives 3.to master the useful sentence structures, words and expressions used in the relevant exercises

1. to know The Development of Paging System Teaching 2. to understand the construction of paging system Objectives

1. to know the operation and advances of WDM and optical network Teaching 2. to understand the main idea and organization of the text; Objectives 3.to master some important new words, phrases and their