1、ComputersUnit 3The development of computersObjectiveTest your knowledge of the development of computers.Words reviewvt.计算adj.普遍的；通用的；宇宙的calculateuniversalA toy?A handbag?A computer is a machine which keeps knowledge in its memory and does work on that knowledge.This knowledge is kept in symbols;it i
2、s 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?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.
3、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 through 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 a
4、m 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 smallest 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 c
5、alculating.In China,a lot of students use me when solving mathematical problems.Do you know who I am?calculatorI am very big.Scientists 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
6、suitable for doing jobs too boring,difficult,or dangerous for human beings.Do you know who I am?PC Personal ComputerIm a small,relatively inexpensive computer designed for an individual user.Im based on the microprocessortechnology.At home,people use me to surf the Internet and play games.Do you kno
7、w 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 useful 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
8、 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(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
9、 of the monitor that you look at3.something you use to click on things(files,etc.)4.the part of the computer 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 develop
10、ment 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 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 friendsdo
11、wnload music and filmsbuy things onlineplay games on the computerdraw pictureslook at photographs on 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?
