人教版高一英语必修2所有精华版ppt课件

1、Unit 3 ComputersUnit 3 ComputersReading WHO AM I?1;. 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?Do you know who I am?abacusRiddles(谜语谜语):2;. I am very small. I can be used for

2、calculating. In China, a lot of students use me when solving mathematical problems. Do you know who I am? Do you know who I am?calculatorRiddles(谜语谜语):3;. 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

3、 not a PC, because Im small enough for you to take me with you.notebook computerDo you know who I am?Do you know who I am?Riddles(谜语谜语):4;. Discussion What do they have in common? What do they have in common? I think that In my opinionI believe thatWhy do you think so?Whats your reason?5;.I think th

4、ey all can calculate something.It I think they all can calculate something.It can deal with some maths problems. can deal with some maths problems.I believe that they are our good friends.In I believe that they are our good friends.In our everyday life. We can not finish our our everyday life. We ca

5、n not finish our work quickly without them.work quickly without them.In my opinion ,people improve abacus,make In my opinion ,people improve abacus,make it more useful and make it a computer.They it more useful and make it a computer.They are being used widely and conveniently in are being used wide

6、ly and conveniently in the world. the world.6;.lHave the computer and Internet become part of your life?Have the computer and Internet become part of your life?lWhat can you use them to do?What can you use them to do?THINKING7;.I use the computer or Internet to:type my homeworktype my homeworkdraw p

7、icturesdraw picturesplay gamesplay gamescommunicate with my municate with my friends.gather related information for my lessonsgather related information for my lessonsbuy the things I like, eg books and clothes.buy the things I like, eg books and clothes.listen to musiclisten to musicwatch movies.wa

8、tch movies.8;.Give the English name of the following pictures of the computer components (组件组件)9;.What is it in English?Main board(主板主板)10;.What is it in English?CPU (central processing Unit)中央处理器中央处理器11;.What is it in English?hard disc12;.What is it in English?floppy disc13;.What is it in English?K

9、eyboard (键盘键盘)14;.What is it in English?monitorscreen15;.What is it in English?mouse鼠标鼠标16;.DVD ROM Digital Versatile Disc Read Only Memory 数字通用光盘数字通用光盘 What is it in English?17;.What is it in English?Printer18;.What is it in English?Modem（调制解调器）（调制解调器）19;.Complete the sentences with some of the wor

10、ds in the box.Monitor, mouse, keyboard, hard disc, floppy disc ,CD-ROM, printer, modemA_ is used to see your data on a computer .A_ or disk is the main device that a computer uses to store information. A _is a machine for printing text or pictures onto paper ,especially one connected to the computer

11、. monitorhard diskprinter20;.Monitor, mouse, keyboard, hard disc, floppy disc ,CD-ROM, printer, modemA_ is used to put data into a computer .A_ _is often used to connect computers to each other though phone lines .Data can also be stored in a _,which is small and can be carried easily.A_ is a disc t

12、hat contains computer data. It can store a large amount of data. keyboardmodemfloppy discCD-ROM21;.Heavy!Heavy!Difficult! Difficult! Hard!Hard!Tired!Tired!Look at the pictures and use some adjectives to describe her/his feelings.Look at the pictures and use some adjectives to describe her/his feelin

13、gs.22;.Free! Free! Easy!Easy!Fast!Fast!Quick!Quick!23;.Useful phrasescalculating machineAnalytical machinecard with holestechnological revolutionuniversal machineartificial intelligencego byby internethuman race计算器计算器分析机分析机穿孔卡穿孔卡技术革命技术革命万能机万能机,通用机器通用机器人工智能人工智能走过，过去走过，过去通过网络通过网络人类人类24;.other useful w

14、ords and expressions about computerNetwork 网络Website站点Program程序Virus病毒Hacker 黑客Download 下载Software 软件Hardware 硬件Up load 上传Home page 主页Password密码Desk top 桌面User name 用户名Click 点击25;.Whats the main idea of this passage?Whats the main idea of this passage? A. The development of computers A. The developm

15、ent of computers B. The development and use of computers B. The development and use of computers C. A machine which is simple-minded C. A machine which is simple-minded D. Computers may replace human being D. Computers may replace human beingFast-readingFast-readingB. The development and use of comp

16、utersB. The development and use of computers26;.( ) ( ) I began as a calculating machine I began as a calculating machine in Japan in 1642. in Japan in 1642. ( ) ( ) In 1936, I grew rapidly both in size In 1936, I grew rapidly both in size and in brainpower. and in brainpower.( ) ( ) As time went by

17、, I was made bigger.As time went by, I was made bigger.( ) ( ) Since the 1970s many new Since the 1970s many new applications have been found for me. applications have been found for me.2. True or False2. True or FalseF FT TF FT T27;.TimeTimeEventsEvents1642164218221822The analytical machine was mad

18、e by Charles Babbage.The computer grew rapidly both in size and in brainpower.1940s1940sThe first family of computers was connected to each other.1970s1970snownowComputers connect people all over the world together.The computer began as a calculating machine.The computer began as a calculating machi

19、ne.19361936The computer had grown as large as a room.The computer had grown as large as a room.19601960Computers were used in offices and homes.Computers were used in offices and homes.3.Table-filling3.Table-filling28;.A. Read the passage carefully and find the topic sentences and the details suppor

20、ting them.Further-readingFurther-reading29;.Paragraph1Paragraph1Paragraph2Paragraph2Paragraph3Paragraph3Topic sentenceTopic sentenceSupporting detailsSupporting detailsOver time I have been Over time I have been changed quite a lotchanged quite a lotThese changes only These changes only become possi

21、ble as my become possible as my memory improvedmemory improvedSince the 1970s many new Since the 1970s many new applications have been applications have been found for mefound for mecalculating machinecalculating machineanalytical machineanalytical machineuniversal machineuniversal machinepc pclapto

22、plaptoptubestubestransistorstransistorschipschipsnetworknetworkworld wide webworld wide webcommunicationscommunicationsfinancefinancetradetraderobotsrobotsmobile phonesmobile phonesmedical operationsmedical operationsspace rocketsspace rocketsproviding a life of high qualityproviding a life of high

23、quality30;.Now we are to read the text onceagain and underline all theexpressions in the text. Put themdown into your notebook after classas homework.B. Read aloud and underline expressions 31;. I, the _, was a calculating machine I, the _, was a calculating machine in 1642 in _.In 1936, I became a “_in 1642 in _.In