1、ComputersUnit 3The development of computersObjectiveTest your knowledge of the development of computers.我们在此处增加本课时重点单词和短语表达部分, 旨在帮助学生在上课前对早读学习的单词及短语进行复习回顾，从而加深记忆。 用一分钟时间对单词进行复习，使学 生在新课学习中没有单词障碍。 通过朗读，使学生熟练掌握单词的正 确发音。 所呈现单词均出自课本单词表中的词 汇。Words reviewvt. 计算adj. 普遍的；通用的； 宇宙的calculateuniversalA toy?A han
2、dbag?A computer is a machine which keeps knowledge in its memory and does work on that knowledge. This knowledge is kept in symbols; it is called data. A computer usually has a monitor to show results. However, some computers can speak. These computers can be used for voice mail. What is a computer?
3、I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they dont like me now. Do you know who I am?abacusRiddles (谜语)I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating throu
4、gh the Internet. However, I am not a PC, because Im small enough for you to take me with you. Do you know who I am?laptopPDA Personal Digital AssistantI am so small in size that I can fit in your hand. I usually have a small screen usually bigger than a digital phone, however smaller than the smalle
5、st laptop, Im a great way to store telephone numbers, access the Internet, make calculations, and so on. Do you know who I am?I am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems. Do you know who I am?calculatorI am very big. Scientist
6、s use me to solve some mathematical problems. huge computerDo you know who I am?robotIm a machine that works automatically. I can do a wide variety of tasks, especially suitable for doing jobs too boring, difficult,or dangerous for human beings. Do you know who I am?PC Personal ComputerIm a small, r
7、elatively inexpensive computer designed for an individual user. Im based on the microprocessor technology. At home, people use me to surf the Internet and play games. Do you know who I am?1. They can be used for calculating. 2. They can deal with maths problems.3. They are our friends.4. They are us
8、eful and helpful.In pairs discuss what they have in common.DiscussionCan you give us the English names of a computer components (组件)?Tips: 1. We can use a computer to 2. It is made up of some parts, such as keyboard 键盘mouse 鼠标monitor 显示器screen 屏幕speaker 音响host 主机components of a computermain boardCPU
9、 (central processing unit)floppy diskDVD ROMUSB flash disk printerscannermodemscreen keyboardmouse monitorDVD-ROM hard disk1. the part of the computer that looks like a television2. the part of the monitor that you look at3. something you use to click on things (files, etc.)4. the part of the comput
10、er that you type on5. the part of a computer that stores information6. the part of computer that we can put a CD inMatch PDAabacuscalculatorhuge computerPClaptopWhats next?Can you tell the development of computers?robot高速超导计算机 激光计算机分子计算机量子计算机 DNA计算机神经元计算机 生物计算机 未来高性能计算机What do you think will be the
11、next development?Do you know in what ways computers are used today? Work out a list and compare it with your partner.search for see movieslisten to musicread books and magazinessend emails to friendsdownload music and filmsbuy things onlineplay games on the computerdraw pictureslook at photographs o
12、n the computeruse a computer for school worktake part in chat groupsBesides computer, what else can we get information from?Have the computer and Internetbecome part of your life? Discussion Homework1. Write a passage to talk about the functions of a computer or a robot in about 80 words.2. Preview the Reading: WHO AM I?
