人教版高中英语 必修二 Unit3 《Computers---Warming up .ppt

1、Unit 3 ComputersWarming Up&ReadingWho am I?Look at these pictures.What do they have in common?Warming upWarming upabacusabacuscalcutatorhuge computerPClaptopPDArobotabacuscalculatorhuge computerPDArobotlaptopPCWhat do they have in common?1.They can be used for .2.They can deal with .3.They are .math

2、s problemsuseful and helpfulcalculatingReadingPredict:Who am I?What will the passage be about?1.Whats the main idea of this passage?A.The development and use of computers B.A machine which is simple-minded C.Computers may replace human beingReadingA.The development and use of computersSkimming2.Find

3、 out the topic sentence of each Para.Topic Sentences:Para.1:Para.2:Para.3:Over time I have changed quite a lot.These changes only became possible as my memory improved.Since the 1970s many new applications have been found for me.(2)Scan the passage and finish the timeline according to the time and t

4、he events.ScanningTimeEvents16421822The analytical machine was made by Charles Babbage.19361940s1960s1970snowComputers connect people all over the world together.The computer began as a calculating machine.The computer had grown as large as a room.Computers were used in offices and homes.The compute

5、r grew rapidly both in size and in brainpower.The first family of computers was connected to each other.Detailed Reading Part 1(1)true or false(Listen to the tape of Para.1)()I began as a calculating machine in Japan in 1642.()After I was programmed,I could“think”logically and produce an answer quic

6、ker than any person.().By the 1940s,I had grown as large as a room,which worried my designers.().The speaker in this story is a person.FTTFFrancecomputerPart 2(Read Para.23 and fill in the blanks)TimeDevelopmentFunctions In the early 1960sI had a family connected by a(n)_.I was able to_my knowledge

7、with others through the _.Since the 1976sI have been used in offices and homes.Many new _ have been found for me.I has become very important in _,finance and workshareapplicationscommunicationWorld Wide WebCalculating machineLaptopRobotAnalytical machine PCUniversal machineThe development of compute

8、rs:Calculating machineAnalytical machineUniversal machinePC Laptop Robotfinish a gap-filling exerciseThe computer began as a_(calculate)machine.Then it developed into an _(analyze)machine to think“_”（logical).By the 1940s,it had grown as large as a room,_ worried the _(design)._ time went by,it was

9、made smaller and_ (small)with its memory improved.In the early 1960s computers were _(connect)by a network.Since the 1970s many new _ (apply)for the computer has been found in communication,finance,trade and many other ways.The computer has become a _(devote)friend and helper of the human race!calcu

10、latinganalyticallogicallydesingersAssmallerconnectedapplicationsdevotedwhichAdvantages DisadvantagesEvery coin has two sides.Computers have great power.They make our lives more colorful and more convenient.BUTDont forget that computers are just modern toolswhich cant take the place of real people.Never ignore the people beside you or even far away.Anyhow,we should take advantage of computers.1.Retell the text.2.Write a short composition about the advantages and disadvantages of the computer.