必修二U3P1Warmingup.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Computers,Unit 3,A toy?,A handbag?,Computers,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?,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?,abacus,Riddles(,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?,laptop,PDA,Personal Digital Assistant,I 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 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 calculating.In China,a lot of students use me when solving mathematical problems.,Do you know who I am?,calculator,I am very big.Scientists use me to solve some mathematical problems.,huge computer,Do you know who I am?,robot,Im 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 Computer,Im a small,relatively 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 useful and helpful.,In pairs discuss what they have in,common.,Discussion,Can 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 computer,main board,CPU(central processing unit),floppy disc,DVD ROM,USB flash,disk,printer,scanner,modem,screen,keyboard,mouse,monitor,DVD-ROM,hard disk,1.the part of the computer that looks like a television,2.the part of the monitor that you look at,3.something you use to,click,on things(files,etc.),4.the part of the computer that you type on,5.the part of a computer that,stores,information,6.the part of computer that we can put a CD in,Match,PDA,abacus,calculator,huge,computer,PC,laptop,Whats,next?,Can you tell the development of computers?,robot,有人预测现行的计算机体系将在,2010,年遇到无法逾越的障碍,。,但从目前的技术发展趋势来看，新技术不断被应用到计算机行业，,Moore,定律至少到,2010,年仍会有效,，届时计算机的基本构造应不会有大的改变。,What do you think will be the next development?,另一方面，在沿着传统框架发展高性能计算机的同时，,一些新型的计算机体系也已被提出,，有些已从根本上突破了冯,诺依曼计算机体系与电子技术的局限，这方面的工作得到了多方面的重视。,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,Do you know in what ways computers,are used today?,Work out a list and compare it with,your partner.,search for,see movies,listen to music,read books and magazines,send emails to friends,download music,and films,buy things on line,play games on,the computer,draw pictures,look at photographs,on the computer,use a computer,for school work,take part in,chat groups,Besides computer,what else can we get information from?,1.Have the computer and Internet,become part of your life?,2.How has computer changed our life?,Discussion,Homework,1.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?,Thank you.,