陕西省蓝田县焦岱中学高中英语必修二人教版：UNIT 3 COMPUTERS （5） 课件 .ppt

1、Unit 3 ComputersWhat English words do you know about computers?What is it in English?mouse鼠标Main board(主板)CPU(central processing Unit)中央处理器Main board(主板)Useful words and expressions about computersmonitor 显示器click 点击 home page 主页 download 下载 password 密码 upload 上传 file 文件 virus 病毒 document 文档 e-book

2、电子阅读器 software 软件web site 网址hardware 硬件hacker 黑客site 网站Unit 3 Computers?Who Am I 1 Whats the main idea of the whole passage?A The early development of the computer.B The late development of the computer.C The importance of the computer.D The development and use of computers.2 In what order is this p

3、assage arranged(安排)？3 Which style does the text belong to?A Description(描写)B Narration（叙述）C Exposition（说明）D Argumentation(议论)4 What kind of literary devices(修辞)does the text use?timepersonificationListeningPart 1 Read fast and find out the topic sentence in each paragraph:Para 1 Over time I have bee

4、n changed quite a lot.Para 2 These changes only became possible as my memory improved.Para 3 Since the 1970s many new applications have been found for me.Fast-reading changedchangesapplicationsPart 2Part 1The development and use of computersEarliest computerNowadays computer 1642:_ 1822:The Analytic

5、al Machine was made by Charles Babbage._:_ 1940s:_ _:The first family of computers was connected to each other.1970s:_ Now:_Timeline Detailed reading (P19)calculating machine 计算器analytical machine 分析器program 编写程序cards with holes穿孔卡technological revolution技术革命artificial intelligence人工智能universal mach

6、ine 通用机器brainpower智能tube电子管transistor晶体管chip芯片World Wide Web万维网Some difficult words or phrases in the textTimelineThe computer began as a calculating machineThe computer grew rapidly both in size and in brainpower.The computer had grown as large as a room.1960sComputers were used in offices and home

7、s.Computers connect people all over the world together.1642:_1822:The Analytical Machine was made by Charles Babbage.1936:_ _1940s:_:The first family of computers was connected to each other.1970s:_Now:_(Detailed-reading)simplify difficult sumsthink logically and produce an answer quicker than any p

8、ersonsolve any difficult mathematical problemused in offices and homes.Detailed-reading Part1 Find out the development of the computers (time/name/function)timetime1822timetime1642calculating machineanalytical machine1936 universal machineSince 1970sPC(desktop)laptopnamenamenamenamenameThe computers

9、 help people in many ways,such as_,_,_,_,_,_and_.Part 2Part 2The computers help people in many ways,such as_,_,_,_ _,_ and _.communication finance trade robotsmobile phonesmedical operationsspace rocketsrescuekeep the doorclean the floorcarry thingswork in the warsexplore the Mars or the outer space

10、Android can be used in many fields in which:1.human beings can not do well;2.the environment is very dangerous;3.it is too far for people to reach Summary:Android can be used in many fields in which:human beings can not do well;the environment is very dangerous;it is too far for people to reach ForS

11、urfing online is harmful to the youngAgainstdebateGroup workForSurfing online is harmful to the youngHave bad effect on studyA waste of moneyA waste of timeOn-line crimeAgainstSurfing online is good to the youngLearnCommunicateEntertainmentSave a lot of timeThere is no doubt that computer has two si

12、des,too.If we make good use of it,it will make our lives more colorful and convenient.But dont lose yourself in playing computers.Just remember:Keep fit,study well and work hard.Homework1 Finish your compsition after class and hand it in tomorrow.2 Make good preparations for“ANDY-THE ANDROID”.(P23)P

13、aras 2-3:Read paragraphs 2and 3carefully and fill in the blanksPart 1What happened to his memory and shape?Many _ have happened to my_.First it was _ in tubes,then on_and later on very small _.So my_totally changed.As I have grown older Ihave also grown _.changesmemorystoredtransistorschipsshapesmal

14、lerFill in the blanks:I began as a _ machine in 1642 in France.In 1822 I was built as an _ machine.Then in 1936 Alan Turing wrote a book and built a _ machine.As the years have_ _,I have been made _.There were times when my size _ changed.And my memory became _ large _ I couldnt believe it.In the 19

15、60s they gave me a family_ by a network.I was able to _with others through the World Wide Web.Since the 1970s many new applications _ for me.calculatingAnalyticaluniversalgone bysmaller totallythatconnectedhave been foundshare my knowledgeso AdvantagesWe can use the compuers to1.use a computer for s

16、chool work2.play games on the computer3.send emails to friends4.download music and films5.go shopping on line6.use QQ to make municate with others What roles do computers play in your life?On-line crime is rocketing every year!Hackers can steal peoples information and even money easily with their co

17、mputers.Many cheaters use computers to deceive old people and young kidsschool workgamesemailsmusic and filmschatinformationphotosshoppingWe can use the computer to.listen to musicWatch moviessearch for communicate withdo shoppingFrom the 1940s to the 1970s The computer was made smaller,and its 5._b

18、ecame better.The computer could memorize all the things During that time,the first PC and the first 6._ were made.In 7_Computer were connected by a 8._.Through the network,people could 9._knowledge and information.Since the 1970sComputers have been used in many 10._.memorylaptopthe early 1960ssharen

19、etworkwaysTrue or False?Correct the wrong ones.1.In 1642 I began as a calculating machine and could solve any mathematical problem.2.My real father was Charles Babbage,who wrote a book and built me in 1936.3.After I got my new transistors in the 1960s,I became smaller but cleverer and quicker.4.I wa

20、s brought into peoples homes in the 1970s.5.Since my birth I have been built to take the place of human race.FFTTFcalculatingAlan TuringserveAdvantages and disadvantages of the computers.Discussion Changes of the machineCalculating machineAnalytical machineUniversal machineMachine with artificial in

21、telligenceMachine with new transistorA family connected by a networkA family used by the InternetUseful phrasescalculating machineAnalytical machinecard with holestechnological revolutionuniversal machineartificial intelligencego byby internethuman race计算器分析机穿孔卡技术革命万能机,通用机器人工智能走过，过去通过网络人类8.use the I

22、nternet to search forinformation9.surf the web for fun10.read news both at home and abroad,read books and magazinesDisadvantages1.Some students may get too addicted(沉溺于)to it.2.Some students waste too much time in playing computer games.3.Some students spend too much time in chatting with others and may be cheated(欺骗)by someone on line.4.As a result,they have little time to study 5.It is bad for our eyes and health to spend long time in front of computers.