高中英语必修二unit3PPT课件

1、12Guess! A toy?A handbag?3 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?Do you know who I am?abacusGuess more:4 I am very small. I can be used for calculating. In China, a lot of

2、 students use me when solving mathematical problems. Do you know who I am?Do you know who I am?calculator5 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 ta

3、ke me with you.notebook computerDo you know who I am?Do you know who I am?6A huge computerA PClaptop(手提电脑手提电脑)PDA(掌上电脑掌上电脑)Caculator计算器计算器abacus7Who am I ?8Skimming: Go over the story to find out who the speaker is. Write down 3 sentences to support your idea.It is a computer. I was able to share my

4、 knowledge with others through the World Wide Web. ”My real father was Alan Turing .” I was built as an Analytical Machine by Charles Babbage.”9 1642 The Analytical Machine was made by Charles Babbage. 19361940s The first family of computers was connected to each other.1970sTimelineThe computer bega

5、n as a calculating machine1822Alan Turing wrote a book to describe how computers could be made to workComputers had grown as large as a room.1960s Computers were used in offices and homes.Scanning:10True or False Alan Turing built an Analytical Machine to solve any mathematical problems. People bega

6、n 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, the computer was used by people around the world through the Internet.5. The larger the computer is, the more memory it has.

7、FTFTFa universal machineits birthI became small and thin but I got cleverer and cleverer, quicker and quicker. And my memory became so large that I couldnt believe it!111. Choose the best answers1) Whats the main idea of the text? A. The computer wants to find “who he is”. B. The functional change o

8、f the computer. C. The computer becomes popular around the world. D. The history of the computer.Comprehending:122) What can you infer from the text? A. The computer has artificial intelligence. B. The computer changes a lot over the years. C. The computer was not connected by a network until in the

9、 early 1960s. D. Now the computer can only be used to deal with information.13Q1: How did the computer work as an Analytical Machine? The computer followed instructions from cards with holes.2. Questions14Q2: In how many ways do we say the computer changed? What are they? Size: Intelligence: Speed:

10、Function: People opinion:smallerquickercleverercalculating-dealing with , communicating withclever & useful15 1642began calculating France1822The Analytical Machine Charles Babbage 1936Alan Turing wrote built 1940sAs large asconnected share talk 1970sBecome very important in nowdeal with communicate

11、 1960sConsolidation: Retelling161 A monitor is2 The screen is3 A keyboard 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 cli

12、ck on things (files, etc.).(e) the part of the monitor that you look at.(f) a separate disk that contains lots of information.Match the words with their meanings.Match the words with their meanings.171.What can the computer be used for?Task 2. Discussion18school workgamesemailsmusic and filmschatinf

13、ormationphotosshopping19palmtop smaller desktop convenient laptop 202.What about in the future?virtual keyboards 虚拟键盘虚拟键盘Nose-topkeyboard-vest21robotWhat about in the future?2223Suppose you are a reporter. Now you are interviewing Mr. / Miss Computer. Sample questions: What do you like to eat? What are you