人教新課標(biāo)必修二第三單元-computers課件(共19張)

1、Unit 3 ComputersUnit 3 ComputersComputerListening to musicSending emailsWatching moviesSearching for informationShoppingPlaying gamesChatting online.What do you often use computers to do?ComputerListening to musicSendHistory of The Computers The earliest computer was the abacus, used to perform basi

2、c arithmetic operationsElectronic computers were invented in the last centuryFirst Generation Computers were invented in the 1940s 1950sFirst electronic computers were huge and complexThe second generation of computers(1955-1960) came about thanks to the invention of the transistorThird Generation C

3、omputers (1960s) minicomputers were first appeared.The personal computers we are familiar with appeared in Fourth Generation Computers (1971 present)The first portable computer was commercialized in 1981Nowadays computer technology has expanded to the field of artificial intelligence.Computers make

4、our life more and more colorfulHistory of The Computers The eBy the end of this period, you will be able todiscover textual pattern writing purposejudge situational context pragmatic valueexpress your attitude to the computers your reflection on the passageBy the end of this period, you Textual Patt

5、ern AnalysisGeneral statementDetail 1Over time I have been changed quite a lot. I began as a calculating machine in France in 1642. Although I was young I could simplify difficult sums. I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charle

6、s Babbage. After I was programmed by an operator who used cards with holes, I could think logically and produce an answer quicker than any person. Detail 2 Textual Pattern AnalysisGener Textual Pattern AnalysisDetail 3 At that time it was considered a technological revolution and the start of my art

7、ificial intelligence. In 1936 my real father, Alan Turing, wrote a book about how I could be made to work as a universal machine to solve any difficult mathematical problem. From then on, I grew rapidly both in size and in brainpower. By the 1940s I had grown as large as a room, and I wondered if I

8、would grow any larger. Detail 4 Textual Pattern AnalysisDetai Textual Pattern AnalysisDetail 5 However, this reality also worried my designers. As time went by, I was made smaller. First as a PC (personal computer) and then as a laptop, I have been used in offices and homes since the 1970s. Textual

9、Pattern AnalysisDetaiTextual Pattern AnalysisGeneral statementDetail 1These changes only became possible as my memory improved. First it was stored in tubes, then on transistors and later on very small chips. As a result I totally changed my shape. As I have grown older I have also grown smaller. Ov

10、er time my memory has developed so much that, like an elephant, I never forget anything I have been told! And my memory became so large that even I couldnt believe it! Detail 2Textual Pattern AnalysisGeneraTextual Pattern AnalysisDetail 3But I was always so lonely standing there by myself, until in

11、the early 1960s they gave me a family connected by a network. I was able to share my knowledge with others through the World Wide Web.Detail 4Textual Pattern AnalysisDetailTextual Pattern AnalysisGeneral statementDetail 1Since the 1970s many new applications have been found for me. I have become ver

12、y important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put into space rockets and sent to explore the Moon and Mars. Anyhow, my goal is to provide humans with a life of high quality. I

13、 am now truly filled with happiness that I am a devoted friend and helper of the human race!Detail 2Detail 3Detail 4Textual Pattern AnalysisGeneraSituational ContextWhat is the main idea of the text?1A. The latest development of the computer.B. The advantages of the computer.C. The importance of the

14、 computer. D. The history of the computer.Situational ContextWhat is theHow does this text develop?21642: _1822: The analytical machine was made by Charles Babbage._: _1940s : _:The first family of computers was connected to each other.1970s: _Now : _ The computer began as a calculating machine.1936

15、The 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. How does this text develop?2Th18221940s164219361960s1970sNowTime oder18221940s164219361960s1970sNoAut

16、hors attitudeWriting purposePragmatic AnalysisIntended ReaderTo tell readers about the history of the computer.Anyone who is interested in computers.SupportiveAuthors attitudeWriting purpoTopic-Related LEXISOver time I have been changed quite a lot. These changes only became possible as my memory im

17、proved.Since the 1970s many new applications have been found for me.calculating machineanalytical machineuniversal machinelaptop1tubestransistorschips networkWorld Wide Web2communications,finance and trade. robots,mobile phonesmedical operationsspace rockets3Topic-Related LEXISOver time ICritical thinkingAre computers always good to us? and why? Critical thinkingAre roduction3.explanation4.conclusionIn my opinion/ I believe.The computer is very.Because/ The reason is that. All in all/ Inbrief, I prefer.Useful