Unit 3 ComputersUnit 3 Computers Period 1Period 1 Warming up Warming upHeavy!Difficult! Hard!Tired!1. Easy!2. Fast!3. Free!keyboardmousemonitorscreenspeaker host computercamera What do they have in common?an abacusa calculatora desktopa notebook computera laptopdigital camera a robotwork for us in Mars(火星火星)Whatsnext?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?CD - DVD-ROM-DVD RWCRT monitorLCD monitorLCD monitorCPUhard disc硬盘chips芯片芯片/motherboard母版somehardware硬件:使用阴极射线管(CathodeRayTube)的显示器LiquidCrystalDisplaykeyboardmouseModem调制解调器Scanner扫描仪printerspeakerfloppy disc/disk磁盘USB flash discCD/VCD/DVDMP3 playerMP4playerMemory:(存储器)移动硬盘移动硬盘USBFlash disc 1 TB 固态硬盘固态硬盘1T硬盘硬盘Harddisc:Core2Duo 酷睿酷睿2 : 4核核龙芯龙芯8核核cpu:other useful words and expressions about computer:Network网络网络 Virus病毒病毒Download 下载下载Up load 上传上传Program程序程序Website站点站点Hacker 黑客黑客Home page 主页主页Password密码密码Desk top 桌面桌面User name 用户名用户名Click 点击点击Software 软件软件Hardware 硬件硬件Home page 主页主页Reading: Who am I?Skimming: Read and answer these questions:2. Who was the first person to invent the earliest computer? 3. Who was the next important person to design computers? Charles BabbageAlan Turing1. Who am I?A computer.timeline1642: 1822: 1936: 1940s:1960s: 1970s: Now: Scanning:The computer began as a calculating machine. the Analytical Machine was built by Charles Babbage.The computer grew rapidly both in size and in brainpower.Computer had grown as large as a room.Computers were used in officers and homes.Computers connect people all over the world together.the first family of computers was connected to each other The history of computersthe second generationthe second generation (1956-1963) (1956-1963)the third generation (1964-1971)the fourth generation (1971- )The first generationThe first generation (1945-1956) (1945-1956)The development of computers:Calculating machineAnalytical machineUniversal machineArtificial intelligenceComputerInternet计算器计算器分析机分析机万能机万能机,通用机器通用机器人工智能人工智能Develop-mentEarly daysNameFunctionPoorStrongA _ machineSimplify difficult sumsAn _ machineThink logically and produce an answer quicklyA _ machineSolve difficult _calculatinganalyticaluniversalmathematical problemsDevelop-mentNetwork times_ stored inTubesLargeSmall_Small chips _Narrow WideFinance_RobotsMobile phones_Space rocketsMedical operations MemoryTransistorsApplications CommunicationTradeIntensive reading: Underline the phrases &sentences that you think are importantStar sentences:P1 L2 I _instructions from cards with holes.P1 5 Earlier I was not very big, but then I became _ .P1 L6 However, people thought I was _ until they _ I had “artificial intelligence.”我执行穿孔卡的指令我执行穿孔卡的指令早些时候我并不是很大，但是后来我变得非常大早些时候我并不是很大，但是后来我变得非常大可是，人们认为我头脑简单，可是，人们认为我头脑简单， 直到发现我有人工智能时，直到发现我有人工智能时，他们才不那么想了。他们才不那么想了。followedhugesimple-mindeddiscoveredP1 L8 As the years have _, I have been made smaller and smaller.P2 L1 There were _ when my size was _changed.P2 L3 But I was always so lonely _ there by myself, until in the early 1960s,they gave me a family _ by a network.随着岁月的流逝，随着岁月的流逝， 我被做得越来越小了我被做得越来越小了.有段时期我的体积完全变了有段时期我的体积完全变了但是我总是孤孤单单地站在那里，直到但是我总是孤孤单单地站在那里，直到60年代初，年代初， 人们才人们才给了我一个用网络连接的家庭。给了我一个用网络连接的家庭。gone bytimestotally standingconnectedAdvantages and disadvantages of the computers. Discussion advantages we cancommunicate with friends listen to the music see films & watch news play games do shopping save a lot of time do a lot of useful things DisadvantagesSome people especially the teenagers abandon (沉迷于沉迷于) themselves to the computer games and chatting on the Internet. As a result, they have little time to study .Some people use the computer wrongly. Homework1.Review the text2.Recite Para one3.Finish Ex. 1/2 on Page 20.