高中英语必修二Unit-3-computers-reading课件.ppt

1、The technology develops so quickly that many new things appear in human beings life.Lets guess what they are:Car1.I am a machine which moves very fast on four wheels.You must be very careful when you drive me.Who am I?washing machine2.I wash clothes for people.Who am I?I am very old now.I was born i

2、n 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 Do you know wwho I am?ho I am?abacusRiddles(谜语谜语):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

3、 who I am?Do you know who I am?calculatorRiddles(谜语谜语):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.notebook computerDo you know who I am?Do yo

4、u know who I am?Riddles(谜语谜语):A toy?A handbag?Riddles(谜语谜语):Give the English name of the following pictures of the computer components(组件组件)CD/DVD-ROMCRT monitorLCD monitorCPUhard discchips/motherboardkeyboardmousemodemscannerprinterspeakerfloppy discUSB flash discCD/DVD/VCDMP3 playermouse monitorsp

5、eaker keyboardWhat do you know about computers?Do you know the history of computers?PC analytical machinecalculating machinelaptopuniversal machinerobot123456Predict:try to put them in order 1.Who is the speaker?2.What is the main idea of the whole passage?A.The early development of the computer.B.T

6、he late development of the computer.C.The importance of the computer.D.The development of the computer.3.In what order is this passage arranged?(安排）安排）Time.It is a computer.Attentions:underline the time in the textSkimming1.When did the computer begin?A.1640 B.1642 C.1822 D.19362.Who really invented

7、 the computer?A.Charles Babbage B.Bill Gates C.Alan Turing D.Thomas Edison3.When did computer come into the common family?A.In the 1950s B.In the 1960s C.In the 1970s D.In the 1980sScanning 查读查读5.What can we infer from the text?A.A computer can take the place of the human race to do any work in the

8、future B.The smaller a computer is,the faster it calculates.C.Computers can solve all the problems of the human race D.People can benefit more from computers in the future.321Over time I have changed a lot.These changes only became possibleAs my memory improved.Since the 1970s many new applications

9、have been found for me.Find out the topic sentence of each paragraphAttentions:you should pay more attention to the beginning or the end of the paragraph to find out the topic sentencesTrue or false(Para.2)1.First my memory stored in tubes,then on very small chips and later on transistors.then on tr

10、ansistors and later on small chips2.As time went by,I was made bigger.3.In the 1960s the first family of computers was connected to each other.4.Computers could share information and express their feelings.smallerbut couldntPara 3:Communication/finance/trade/robots mobile phones/medical operations/s

11、pace rocketsproviding a life of high qualityWhat applications are mentioned in Para 3?DevelopmentEarly daysNameFunction PoorStrongA _ machineSimplify difficult sumsAn _ machineThink logically and produce an answer quicklyA _ machineSolve difficult _calculatinganalytical universal mathematical proble

12、msDevelopmentNetwork times_ stored inTubesLargeSmall_Small chips_Narrow WideFinance_RobotsMobile phones_Space rocketsMedical operations MemoryTransistorsApplicationsCommunicationTradeSummary I began as a _ machine in 1642 in France.In 1822 I was built as an _ machine.Then in 1936 Alan Turing wrote a

13、 book and built a _ machine.As the years have_ _,I have been made _.There were times when my size totally _.And my memory became so _ l that I couldnt believe it.In the 1960s they gave me a family_ by a network.I was able to _with others through the World Wide Web.Since the 1970s many new applicatio

14、ns _ for me.calculatinganalyticaluniversalgone bysmaller connectedhave been foundshare my knowledgelargechangedQuestionnaire(问卷调查）问卷调查）How do you use computers and the Internet?1.Help to do homework2.Play computer games3.Send e-mails4.Listen to music5.See movies6.Chat(聊天聊天)7.Search for information8.

15、Do shopping 9.Learn computer skillsYesNoI often use a computer to,I sometimes use it to,and I never use it toShould high school students surf the internet(上网上网)?I think we high school students should surf the internet because(first,second,third)I dont agree with you.In my opinion,it is bad for stude

16、nts to The reason is thatI agree with you.I think we can alsoShould high school students surf the Internet?The reporter will interview some students and teachers about the issue.With the development of computer technology,the internet has become more and more popular among students.However,just as a

17、 saying goes,a coin has two sides.The internet brings both advantages and disadvantages to students.AdvantagesCommunicate with friends listen to the music see films&watch news play games do shopping save a lot of time do a lot of useful things DisadvantagesSome people especially the teenagers abando

18、n(沉迷于沉迷于)themselves to the computer games and chatting on the Internet.As a result,they have little time to study.Some people use the computer wrongly ConclusionThere is no doubt that computer There is no doubt that computer has two sides,too.If we make has two sides,too.If we make good use of it,it

19、 will make good use of it,it will make our lives more colorful and our lives more colorful and convenient.But dont lose convenient.But dont lose yourself in playing computers.yourself in playing computers.Just remember:Keep fit,study Just remember:Keep fit,study well and work hard.well and work hard.HomeworkPreview the language points in the text using reference books or dictionaries.