人教版高中英语 必修二 Unit3 《Computers---Warming up 》 课件 (2)(共26张PPT).ppt

1、Unit 3 ComputersWith the development of science and technology,many new things appear in human beings life.Lets guess what they are:Warming upGuessing gameI am a machine which moves very fast on four wheels.You need a license(执照)and must be very careful when you drive me.QQ,BYD,Benz and BMW are some

2、 famous kinds of me.Who am I?Warming upGuessing gameI am a machine that you use to talk to other people even in a far-away place.I am connected by wire or radio.Now each of us often has a number.Who am I?Warming upGuessing gameI am very old now.I was born in China.Many people used me for calculating

3、 in the past,but now I am a bit lonely because they dont like me now.Do you know who I am?Warming upGuessing gameI 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?Warming upGuessing gameIt is a machine,which you ca

4、n use to type your homework,draw pictures,play games,watch movies,listen to music,communicate with your friends,gather informationWho am I?Warming upGuessing gameGuiding questions:We use computers almost everyday.But how much do we know about it?1.When was the computer invented?2.What did it look li

5、ke before?3.Who was the real father of computers?4.How did computers change through these years?Who am I?Fast reading1.Choose the best answer Whats the main idea of the text?A.The computer wants to find“who he is”.B.The functional change of the computer.C.The computer becomes popular around the worl

6、d.D.The development of the computer.The structure of the passageTask:The passage has three paragraphs.Find out the topic sentence of each paragraph,and the details that are used to support the topic sentences.Then complete the chart in activity 2.1.What type of writing is it?expository writing 说明文Ti

7、ps:It often has a clear structure,which makes it easy for us to find the answers to the questions.2.Where can we usually find the topic sentence?The beginning of the passage.Over time I have been changed quite a lot.Calculating machineAnalytical machineUniversal machinePClaptopThese changes only bec

8、ame possible as my memory improved.tubestransistorschipsnetworkWorld Wide Web communications finance trade robots mobile phones medical operations space rockets providing a life of high qualitySince the 1970s many new applications have been found for me.Careful readingRead the passage carefully and

9、finish the timeline.The computer began as a calculating machineThe computer grew rapidly both in size and in brainpower.Computers had grown as large as a room.1960sI have been used in offices and homes.Computers connect people all over the world together.calculatinganalyticaluniversalmathematical pr

10、oblemsScanning for detailsMedical operations MemoryTransistorsApplicationsCommunicationTradeMultiple choice1.When was the computer connected by a network?A.In the 1940s.B.In the early 1960sC.Since the 1970s D.In 19362.What does“others”in Line 24 refer to?A.Other people B.Other families C.Other netwo

11、rks D.Other computersMultiple choice3.Who made the first analytical machine?A.Bill Gates.B.Charles BabbageC.Alan Turing.D.An operator4.Since the 1970s,computers have been used in the following fields EXCEPT _.A.financing B.making space rockets C.exploring the sun D.doing medical operations5.What can

12、 you infer from the text?A.The computer has artificial intelligence.B.The computer changes a lot over the years.C.The computer can do more things for the human race in the future.D.The computer can control people in the future.短文填空 Over time I have been changed a lot.I could 1 (simple)difficult sums

13、 when I began 2 a calculating machine.After I was programmed by an operator,I could“think”logically and produce an answer quicker 3 any person.At that time it 4 (consider)a 5 (technology)revolution.In 1936,I could solve difficult problems as a 6 (universe)machine.From then 7 ,my memory has developed

14、 so much 8 I never forget anything I have been told.Since the 1970s,many new applications have been found for me.For example,I have been sent to explore the Moon.9 ,my goal is 10 (provide)humans with a life of high quality.simplifyas thanwas considered technological universalon that Anyhow to provid

15、eConsolidation巩固retellingDiscussion:What can computers be used to do in daily life?1.Help with school work2.Play games3.Send or receive emails4.Listen to music and watch films5.Chat online6.Search for information7.Beautify photos8.Online shoppingBad for eyes Children may be addicted上瘾to playing comp

16、uter games.What bad influences may computers have on us?People become lazierIncrease the risk of being cheated by online trapsMajority of addicted computer users lack real life social skills Computer is a tool,not a toy.3.Can you imagine your life without computers or Internet?Net generationWhats next?4.What do you think will be the next development of computers?virtual keyboards虚拟键盘Nose-topkeyboard-vestHomework:1.Review the passage 2.同步练习