二、活塞环 (一)气环 1作用: (1)密封:防止气缸内的气体窜入油底壳; (2)传热:将活塞头部的热量传给气缸壁; (3)辅助刮油、布油

Chapter Three Communications Channel Unit 10 Part 1 Notes to Text Part4 Extensive Reading Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage

一、有关概念 1、通信:CPU与外界的信息交换。 2、串行通信的优点:节省传输线,利于远程通信;

Chapter FourA The Internet Unit们 Part 1 Notes to Text Part4 Extensive Reading Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage

Chapter Five Image Creation Unit 20 Part 1 Notes to Text Part4 Extensive Reading Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage

Chapter Two Data Processing Unit 5 Part 1 Notes to Text Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage Part4 Extensive Reading

Unit8 Part 1 Notes to Text Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage Part4 Extensive Reading

1、熟悉遗精的基本概念 2、熟悉与溢精、早泄的鉴别 3、理解

一、主要内容 问题1:曲边梯形的面积 问题2:变速直线运动的路程

1. Nutritional type of microbe? 1. 1 A distinction should be made between the Heterotrophic and autotrophic Organic compounds .2 Carbon source Carbon dioxide Organic molecule a1.3 Energy source Light or chemistry energy