人教版新课标高中英语必修2unit3.pptx

Unit 3 ComputersUnit 3 ComputersUnit 3 ComputersUnit 3 ComputersGuessingGuessingDo you know who I am?Do you know who I am?warming upI 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 use me often now.Do you know who I am?Do you know who I am?abacus I am very small.I can be used for calculating.In China,a lot of students use me when solving mathematical problems.Who am I?Who am I?calculator计算器计算器 I am very big.Scientists use me to solve some mathematical problems.Do you know who I am?huge computer巨型计算机巨型计算机 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?notebook computer(laptop)笔记本电脑笔记本电脑What do they have in common?1.They can be used for calculating.2.They can deal with maths problems.3.They are useful and helpful.robotartificialintelligence Nowadays computers Nowadays computers play a very play a very important roleimportant role in our daily life.in our daily life.Do you Do you know aboutknow about computers computers？keyboard 键盘键盘mouse 鼠标鼠标monitor 显示器显示器screen 屏幕屏幕speaker 音响音响host 主机主机Components of a ComputerLook at these pictures and guess what they are.a calculating machineanalytical machineuniversal machinesolve difficult mathematical problemscomputer as large as a room Look at these inventions.Can you put them in an order according to the time when they appeared?After reading the passage,check to see if you are right.()analytical machine ()laptop ()calculating machine ()robot ()PC ()universal machine ReadingWHO AM I?Skimming to get general ideasWhile-reading(1)1.Who is the speaker“I”in this story?“I”am a _.2.Whats the main idea of this passage?A.The development of computers.B.The development and use of computers.C.A machine which is simple-minded.D.Computers may replace human puter3.The text is written in an order of _.timeWhile-reading(1):skimmingScanning to get detailed informationWhile-reading(2-3)careful-readingtimeline1642:1822:1936:1940s:1960s:1970s:The computer began as a calculating machine.The Analytical Machine was built by Charles Babbage.The computer grew rapidly both in size and in brainpower.Computer had grown as large as a room.Computers were used in offices and homes.The first family of computers was connected by a network.Many new applications have been found for computers.Now:Computers connect people all over the world together.While-reading(2):scanning(Universal machine)Look at these inventions.Can you put them in an order according to the time when they appeared?After reading the passage,check to see if you are right.()analytical machine ()laptop ()calculating machine ()robot ()PC ()universal machine 123456PDAabacuscalculatorhuge computerPClaptopWhats next?robotThe history of computersPara.1TopicSentenceSupporting detailsTopicSentenceWhile-reading(3):careful readingRead the passage again carefully and finish Ex.2 on P19 in the student book.Over time I have been changed quite a lot.calculating machineanalytical machineuniversal machinePClaptop1.Why could I“think”logically and produce an answer quicker than any person?Because I was programmed by an operator who used cards with holes.While-reading(3):Para.2TopicsentenceSupporting detailsThose changes only became possible as my memory improvedtubestransistorschipsnetworkWorld Wide Web 2.I totally changed my shape,because my memory was first stored intubes,then on transistors andlater on verysmall chips.I totally changed my shape！While-reading(3):Para.3TopicsentenceSupporting detailsSince the 1970s many new applications have been found for municationsfinancetraderobotsmobile phonesmedical operationsspace rocketsprovide a life of high quality3.Many new applications have been found for me,such as communicationsfinance/trade/robots/mobileRockets.phones/medical operations/space 4.(translation)Over time my memory has developed so much that,like an elephant,I never forget anything I have been told.随着时间的推移，我的记忆力发展的如随着时间的推移，我的记忆力发展的如此之快，就像一头大象，我从来不会忘此之快，就像一头大象，我从来不会忘记记 告诉我的任何事情。告诉我的任何事情。While-reading(3):1.My real father was Charles Babbage,who wrote a book and built me in 1936.2.After I got my new transistors in the 1960s,I became smaller but cleverer and quicker.3.I was brought into peoples homes in the 1970s.4.Since my birth I have been built to take the place of the human race.True or FalseQuiz 15.I began as a calculating machine in Japan in 1642.6.In 1936,I grew rapidly both in size and in brainpower.7.As time went by,I was made bigger.8.Since the 1970s many new applications have been found for me.1.Who was the first person to make the earliest computer?A.Alan Turing.B.Charles Babbage.C.Charles Turing.D.Alan Babbage.2.When was the“universal machine”built?A.In 1822.B.In 1642.C.In 1936.D.In 1970.Quiz 23.When was the computer the biggest?A.In 1642.B.In 1936.C.In the 1940s.D.In the 1970s.4.How old is the computer?A.About 170 years old.B.About 270 years old.C.About 370 years old D.About 470 years old.5.Which of the following is in the right order of time?a.The computer was connected with other computers.b.Alan Turing wrote a book about the computer.c.The computer has been sent to explore the Moon and Mars.d.The computer began to simplify difficult sums.A.a.b.c.d.B.b.c.a.d.C.d.a.c.b.D.d.b.a.c.Summary of the reading textI began as a _ _ in 1642 in France.In 1822 I was built as an_ _.Then in 1936 Alan Turing wrote a book and built a _ _.As the years have gone by,I have been made _ and _ but I became _ and _.calculating machineanalytical machinemachineuniversalsmallersmallerclevererquickerIn the _ they gave me a family connected by a _.Now people call it the Internet.I have been used in _ and _ since the 1970s.So I became PC.Since my _ I have truly been built to serve the _ _.network1960shuman raceofficeshomesbirthpalmtop smaller desktops convenient laptop What are todays smaller computers like?the iPadWhat are advantages and disadvantages of computers nowadays?Advantages listen to the music see films watch newscommunicate with friends buy things on lineDisadvantagesplay computer games too muchchat（聊天）（聊天）on the Internet too muchlittle time to study“低头族”Homework1.Review the text2.Finish Ex.1/2 on Page 20.ThankThank youyoufor for listening!listening!