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

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

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国家标准的基本规定 2.平面几何图形的画法

一、点在两投影面体系中的投影

一、直线与平面平行 二、平面与平面平行 三、直线与平面相交 四、平面与平面相交

一、平面的表示法 用几何元素表示平面

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

一、启动 1.使用“开始”菜单启动AutoCAD2000 ①执行“开始”→“程序”→“AutoCAD22000