人教版高中英语必修二Unit 3 Computers warming up&reading课件(共20张PPT)

课件20张PPT。ComputersUnit 3A toy?A handbag?Computerskeyboard 键盘mouse 鼠标monitor 显示器screen 屏幕speaker 音响host 主机what does a computer include?main boardCPU (central processing unit)printerscannermodemOther useful words and expressions about computer:Network Virus Download Upload Program　 Website　 HackerHome page Password　 Desk top User name Click Software Hardware网络病毒 下载上传程序站点黑客主页密码桌面用户名点击软件硬件PDAabacuscalculatorhuge computerPClaptopWhat’s next?Can you tell the development of computers?robotWHO AM I?1. Who am I ? 2. Who built the first analytical machine? 3. Who was my real father? Charles Babbage built the first analytical machine.Alan Turing was my real father.I am a computer.Part1: Skimming:( ) Analytical machine(分析机) ( ) Laptop ( ) Calculating machine(计算机器) ( ) Robot／android ( ) PC ( ) Universal machine(通用机器)Can you put these inventions in an order according to the time when they appeared?216435 What’s the main idea of this passage? A. The development of computers B. The development and use of computers C. A machine which is simple-minded D. Computers may replace human beingMain ideaB The computer began as a calculating machine．The computer grew rapidly both in size and in brainpower.Read and finish the timeline below. Part2: Scanning:The computers had grown as large as a room.1960sComputers were used in offices and homes.Computers connect people all over the world together.Read and Complete the chart.Over time I have been changed quite a lot.calculating machine analytical machine universal machine PC laptopThese changes only became possible as my memory improvedtubes transistors chips network World Wide WebSince the 1970s many new applications have been found for me.communications; finance; trade; robots; mobile phones medical operations space rockets providing a life of high qualityWhat are the advantages and disadvantages of the computers? In my opinion,I can use the computer to…. DiscussionWe can use the computer to……. listen to musicWatch moviessearch for …communicate with…do shopping Disadvantages Some students may get too addicted (沉溺于)to it . Some students waste too much time in playing computer games. Some students spend too much time in chatting with others and may be cheated (欺骗)by someone on line. As a result, they have little time to study It is bad for our eyes and health to spend long time in front of computers. The end !!