1. to know the origin and development of Internet Teaching 2. to understand the main idea and organization of the text

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

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

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

NEW WORDS AND PHRASES vISIonary[ vita n ari]n.幻想家,梦想家 contribute [kan tribju]v.捐献,贡献 kan]adv.重大的,效果显著的,具有特殊意义的

cellular[' se j u13]a.细胞(状)的,蜂窝状的,单元的 mobile[' mou a i l,' mou i()1]a.运动的,流动的,机动的,装在车上的 deploy[di' p iJv.;n.展开,使用,推广应用

asynchronous[a'si6 k ranas]a.异步的 serial[' sirian]a.串行的,串联的 transmission[ t raen z'mi∫an]a.传输,发送 interface[ i n taf e i s]r.接口

六、建筑装饰施工图实例 以四川建筑职业技术学院第四教学楼门厅、报 告厅装饰施工图为例 (一)按照图纸顺序识读 1、图纸目录

动词的-ing形式在起名词作用肘,称为动名词。动名词在句中可以 1)用作主语:

1.当句首为 here,there,now,then,such等 2.用于某些以地点状语开头的句子