1. understand the main idea (despite his wealth, Sam Walton remains down-home and devoted to his team) and the structure of the text; 2. appreciate the use of indirect description in portraying person: 3. grasp the key language points and grammatical structures in the text

Contents Teaching Objectives Background Information Text Organization Words and Expressions Grammatical Structures Questions

Part 1 Objectives Part 2 Background Part 3 Text Organization Part 4 Language Study Part 5 Translation

Part 1 Objectives Part 2 Background Part 3 Text Organization Part 4 Structure Study Part 5 Language Points Part Translation

Part 1 ObjectivesPart Part 2 Background Part 3 Ddiscussion Part 4 Language Points Part Ccontent Questions Part 6 Translation

Text A Tony Trivisonno's American Dream Part 1 Obiectives Part Discussion Questions Part3 Background Part 4 Text Structure Part Lanquage Points

Text A Public Attitudes toward Science Part 1 Objectives Part 2 Cultural Notes Part 3 Text Structure Part 4 Language Points Part 5 Content Questions

为了延长系统的传输距离,人们主要在减小色散和损耗方面入手。1310nm光 传输窗口称之为0色散窗口,光信号在此窗口传输色散最小,1550m窗口称 之为最小损耗窗口,光信号在此窗口传输的衰减最小

一、信道分类及信道特性分析 二、数字微波通信系统 三、数字卫星通信系统 四、数字光纤通信系统

2.6信号流图 2.6.1信号流图的定义及基本性质 信号流图是表达线性代数方程组结构的一种图。 在信号流图中,小圆圈表示变量或信号,称为 节点。连接两节点的线段称为支路,信号只能 由支路的箭头方向传递。标在支路旁边的数学 算子称为传递函数或传递增益。传递增益可以 是常数,也可以是复变函数。当传递函数为1 时可以不标