一、选择题（20 分） 1、流体运动的两种重要参数是（ ）。 （A）压力、速度； （B）压力、温度； （C）比容、密度； （D）比容、速度

1、指出离心式风机主要部件名称 2、指出轴流泵主要部件名称

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 transmission media of data signals, the structure of full-duplex data transmission system and its peration and the coding of data signals 2. to understand the main idea and

1. to know the origin, operation and disadvantages of asynchronous serial data transmissioneaching 2. to understand the main idea and organization of the tex Objective

1. to know current situation and the future in the telecommunication world Teaching 2. to understand the main idea and organization of the text

1. to know The Integrated Services Digital NetworkTeachi 2. to understand the construction of The Integrated Services Digital NetworkObjectives 3. to master some important new words and passive voiceFocal

5.1轴测投影的基本概念 5.2正等测图的画法 5.3斜二测图的画法

4.1基本体 4.2平面与立体相交 4.3几何体的尺寸标注

3.1点的投影 3.2直线的投影 3.3平面的投影