必修2 unit3 reading 公开课课件.ppt

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1、Unit3ComputersWarmingupandreading1GuessinggameIamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusIamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.Doyoukn

2、owwhoIam?calculatorAtoy?Ahandbag?ComputersHowmuchdoyouknowaboutcomputers?keyboardmousehostcomputerscreenmonitorspeakerThecomponents(组成部分)ofacomputer:AhugecomputerAPCPDAlaptopThedevelopmentofcomputersQ:Whatcanweusecomputerstodo?Pre-readingWecanusethecomputerto…….listentomusicwatchmoviess

3、earchforusefulinformationcommunicatewithfriendsbuythings怎样学好英语ReadingWhoAmI?Task1ReadingforgeneralideaQ2.Whatdoeseachparagraphtellus?Q1.Inthepassage,whatdoes“I”refersto？acomputerTipsAtopicsentencegivesthemainideaofaparagraph.Atopicsentenceisusuallythefirstorlastsentenceofaparagraph.Para

4、graph1Paragraph2Paragraph3OvertimeIhavebeenchangedquitealot.Thesechangesonlybecamepossibleasmymemoryimproved.Sincethe1970smanynewapplicationshavebeenfoundforme.Q3.What’sthemainideaofthetext?Thechangesandtheapplicationsofthecomputer.Atip:Thekeywordsinthetextmayhelpyoutosummarizethemainid

5、eaofthetext.Task2ReadingfordetailsReadpara1andfinishtheexercise.E1:Whatwasthecomputercalledindifferentstages?1.Itbeganasa(n)_________________inFrancein1642.2.About200yearslateritwasbuiltasa(n)__________________byCharlesBabbage.3.In1936itwasmadetoworkasa(n)_________________.4.Astimewentb

6、y,thecomputerwasmadesmaller.Firstasa＿＿＿＿＿＿＿＿＿＿＿＿＿andthenasa__________.calculatingmachineanalyticalmachineuniversalmachinePC(personalcomputer)laptopE2:Twoimportantcharacters:CharlesBabbageAlanTuringanalyticalmachinerealfatheruniversalmachineNameFunctionAcalculatingmachineAnanalyticalmach

7、ineAnuniversalmachineAPC/alaptopSolvedifficultmathematicalproblemsThinklogicallyandproduceananswerquicklySimplifydifficultsumsBeusedinofficesandhomesE3:FunctionofeachmachinePara2:technicalwordsMemory:chiptransistortubeTheamountofspaceinacomputerforstoringinformation.内存networkTh