高中英语必修二unit3课件PPT文档格式.ppt

1、,Computers,I 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 like me now.Do you know who I am?,abacus,Guess more:,I am very small.I can be used for calculating.In China,a lot of students use me when solving mathematical

2、problems.Do you know who I am?,calculator,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 computer,Do you know who I am?,A huge computer

3、,A PC,the history of the computer,laptop（手提电脑）,PDA（掌上电脑）,Caculator计算器,abacus,Who am I?,Skimming:Go over the story to find out who the speaker is.Write down 3 sentences to support your idea.,I was able to share my knowledge with others through the World Wide Web.,”My real father was Alan Turing.”,I w

4、as built as an Analytical Machine by Charles Babbage.”,Timeline,The computer began as a calculating machine,1822,Alan Turing wrote a book to describe how computers could be made to work,Computers had grown as large as a room.,1960s,Computers were used in offices and homes,Computers were used in offi

5、ces and homes.,Scanning:,True or False,Alan Turing built an Analytical Machine to solve any mathematical problems.People began to realize that the computer got cleverer and quicker with time passing.The computer began to serve the human race since it was brought into peoples homes.Since the 1970s,th

6、e computer was used by people around the world through the Internet.5.The larger the computer is,the more memory it has.,F,T,F,T,F,a universal machine,its birth,I became small and thin but I got cleverer and cleverer,quicker and quicker.And my memory became so large that I couldnt believe it!,correc

7、t the wrong sentences,1.Choose the best answers1）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 world.D.The history of the computer.,Comprehending:,2）What can you infer from the text?A.The comp

8、uter has artificial intelligence.B.The computer changes a lot over the years.C.The computer was not connected by a network until in the early 1960s.D.Now the computer can only be used to deal with information.,Q1:How did the computer work as an Analytical Machine?The computer followed instructions f

9、rom cards with holes.,2.Questions,Q2:In how many ways do we say the computer changed?What are they?Size:Intelligence:Speed:Function:People opinion:,smaller,quicker,cleverer,calculating-dealing with,communicating with,clever&useful,1960s,Consolidation:Retelling,1 A monitor is2 The screen is3 A keyboa

10、rd is4 A mouse is5 A CD-ROM is6 A hard disk is,（a）the part of a computer that stores information.（b）the part of the computer that you type on.（c）the part of the computer that looks like a television（d）something you use to click on things（files,etc.）.（e）the part of the monitor that you look at.（f）a s

11、eparate disk that contains lots of information.,Match the words with their meanings.,Internet,1.What can the computer be used for?,Task 2.Discussion,school workgamesemailsmusic and filmschatinformationphotosshopping,Our life has changed!,palmtop,smaller desktop,convenient laptop,What are todays smal

12、ler computers like?,2.What about in the future?,virtual keyboards 虚拟键盘,Nose-topkeyboard-vest,robot,What about in the future?,Suppose you are a reporter.Now you are interviewing Mr./Miss Computer.Sample questions:,What do you like to eat?What are your hobbies?What is your newest function（功能）?Can you say something about your future plan?etc.,Task 3.Role-play,Homework:,Review the passage 2.Do Ex.1-3 on P19-20.3.Read the story about Bill Gates.,