必修二unit3-Computers-Reading-I.ppt

必修二unit3-Computers-Reading-IGuess! A toy?A handbag? 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 don’t like me now. Do you know who I am?Do you know who I am?abacusGuess more: I 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?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 I’m small enough for you to take me with you.notebook computer/laptopDo you know who I am?Do you know who I am?A huge computerA PCPalmtop (掌上电掌上电脑脑)calculatorabacuslaptopwork for us in Mars(火星火星)What’s next?carry thingswork in wars (战斗战斗)仿真机器人entertainment 娱乐娱乐What do you think will be the next development?Who am I ?Skimming: 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 knowledge with others through the World Wide Web. ●”My real father was Alan Turing ....” ● I was built as an Analytical Machine by Charles Babbage.” Read the passage and choose the best answers.1.What can we learn from the text?A Computer has a short history.B No one knows computer when the first computer was made.C Computers are not widely used even today. D Computers are widely used.2. Who was the computer’s real father?A Alan Turning B Not mentioned in the text. C Bill Gates D Charles Babbage3 .The computer almost changed completely _______.A in 1642 B in 1882 C in the 1960s D in the 1970sDAC4. When were the computers connected firstly? A In the 1970s B In the early 1960s C In 1936 D In 18225. Which of the following statements is not right?A Computer has a long history.B Computer has changed greatly since it was first made.C Computers are widely used now.D Computer was brought into people’s home in the 1960s.True or False1.Alan Turing built an Analytical Machine to solve any mathematical problems.2.People began to realize that the computer got cleverer and quicker with time passing.3.The computer began to serve the human race since it was brought into people’s homes.4.Since the 1970s, the computer was used by people around the world through the Internet.5.5. The larger the computer is, the more memory 6. it has.FTFTFTimelineThe computer began as a calculating machineThe computer grew rapidly both in size and in brainpower.The computer had grown as large as a room.1960sComputers were used in offices and homes.Computers connect people all over the world together.1642:_______________________________________________1822:The Analytical Machine was made by Charles Babbage.1936:_____________________________________________ _________________________________________1940s:______________________________________________: The first family of computers was connected to each other. 1970s:_________________________________________Now:__________________________________________ __________________________________________Scanning In 1642The computer began as a(n) 1.______________ machine in France. About 200 years laterThe computer was built as a(n)2.__________machineThe computer was programmed by an operatorusing 3._______________. In 1936A book about how to make a computer a(n)4.“________________”was written by Alan Turing.From then on ,the computer grew rapidly. calculatinganalyticalcards with holesuniversal machineFrom the 1940s to the 1970s The computer was made smaller, and its 5.______________became better.The computer could memorize all the things During that time, the first PC and the first 6.____________ were made. In 7___________Computer were connected by a 8.____________. Through the network, people could 9._____________knowledge and information. Since the 1970sComputers have been used in many 10._______________.memorylaptopthe early 1960ssharenetworkwaysWhat are the advantages and disadvantages of the computers?In my opinion,I can use the computerto….DiscussionWe can use the computer to……. listen to musicWatch moviessearch for …communicate with…do shopping AdvantagesWe can use the compuers to…1. use a computer for school work2. play games on the computer3. send emails to friends4. download music and films5. go shopping on line6. use to make friends7. communicate with others 8. use the Internet to search for information9. surf the web for fun 10. read news both at home and abroad, read books and magazines  Disadvantages1.Some students may get too addicted (沉沉溺于溺于)to it .2. Some students waste too much time in playing computer games.3. Some students spend too much time in chatting with others and may be cheated (欺骗欺骗)by someone on line.4. As a result, they have little time to study 5. It is bad for our eyes and health to spend long time in front of computers.Summary about the text. The computer __________ a calculating machine in 1642, then in 1822, it was built as an___________by ________________. At the year of 1936, AlanTuring ____________ to describe how computers _____________to work , and build a “universalmachine” to solve_________________. With the development of __________________began asAnalytical MachineCharles Babbagewrote a bookcould be mademathematical probleminformation technologyin the 1960s, computers had new __________and became_______________,then were connected to each other by_________. As the years had __________,computers were___________,people’s homes. Now computers have become the most important _________to _____________all over the world together.transistorssmaller and smallera networkgone bybrought intotoolsconnect people 1642began … calculating …France1822built…an analytical machine … Charles Babbage 1936Alan Turing … wrote … made …1940sAs large asgave … connected by … share … with …1970sbecome very important in … nowconnect … all over the world …1960sConsolidation: RetellingHomework:1.Read the passage fluently.2. Do Ex on period 2.3. Retell the passage .谢谢大家！。