Unit 3 《Inventors and Inventions》课件using language（新人教版选修8）.ppt

2 speaking writing 1 listening discussing 1 listening discussing listeningonpage62 readthesequestionsbeforelisteninganddiscusstheminpairs 1 whatfunctionsarealreadyincludedonamobilephone 2 whichonesdoyoufinduseful 3 whatelsedoyouexpectamobilephonetodoforyou amobilethat think amobilethatspendsyourmoney amobilethatcanteachyouenglish amobilethatchoosesyourholiday listentothetapeandtickthedescriptionsyouhaveheard amobilethatmakestea amobilethatisacomputer amobilethatwakesyouup amobilethatordersyourfood listentothetapeagainandanswerthesequestions whichmobiledoesmarythinkshewillbuyandwhy marywantstobuythemobilethatturnsitselfonwhenitreceivesimportantcalls shemissedthreeyesterdaywhenhermobilewasswitched turnedoff 2 whatextraapplicationsdomobileshavenow mobilescantakephotographsandactasacomputernow 3 whatextraapplicationswilltheyhavewiththe3 gmobiles theywillbeabletomonitorhowyouuseyourphone theywillbookholidays choosetheairline hotelandanappropriateplacetostay theywillauthorizepayingforthemtoo 4 whyismaryworried maryisworriedbecauseitmightspendhermoney 5 whatadvantagesdothe3gmobilesoffer theadvantagesarethatithelpspeoplewhoarebusyatworktoordergoodsatthecheapestpriceorbookholidays airtickets etc 6 whatdoyouthinkmightgowrong listeningtext whichoneshouldichoose marybrownisaskingherfriend zhangjie foradvice mb hallo isthatzhangjie thisismary i mthinkingofbuyinganewmobilephone whatdoyousuggest zj hallomary i mhappytohelp it sluckyyoucouldgetthrough i vebeenhavingsometroublewiththelineandikeepgettingcutoff ifthelinegoesdead ringmebackimmediatelyonmymobileanditshouldbeok nowwhatdoyouwantyourmobiletodo mb well i veheardaboutmobilesthatarecomputersandcantakephotographsaswell doyouthinkthey reagoodidea zj mmm yes they reuseful icanusetheinternetevenwheni monthetrain mb soyousuggestonelikethatthen zj notnecessarily itseemsthere llbesomenewmobilephonescomingonthemarketnextyear they regoingtobeevenmorepowerfulthantheonesonthemarketnow mb whataretheygoingtodo zj oh you venoideawhatthey replanning thesenewphoneswillbeabletoorganizeyourlife they recalled3gphonesbecausethey rethethirdgenerationofmobilephones they think foryou mb howcantheydothat zj well they llbeabletomonitorhowyouuseyourphone whenyouplanaholiday thephonewillknowwhichairlineyouliketoflywith andwillbooktheseatsandthehotel thenit llpayforyou mb wow i mnotsurei dbehappywiththat idon tliketheideaofamachinespendingmymoney zj well manybusinessesalreadyusemobilephonestobuygoods theyleavethemtoordergoodswhentheyareattheircheapest mb dotheyreally well inever whatineedisamobiletostopmemissingimportantcalls imissedthreeyesterdaybecausemymobilewasswitchedoff zj youcanhavethattoo there sanewmobilecomingoutsoonthatwillturnitselfonwhenimportantcallscomethrough mb areyousure ifthat sthecase that stheoneforme thankyou zhangjie ithinki llwaitforthatone goodbye zj goodbye 2 speaking writing lookatthesechineseinventionsonp68inpairsanddiscusswhatyouknowaboutthem thinkaboutwhattheywereusedforandthedatetheywereinvented collecttheinformationbydoingsomeresearch fillinthechartandpreparetotalkaboutoneoftheinventionstotheclass 1anabacusisusedtocalculatemathematicalproblemsincludingequations itismoreefficientthanusingthebrainalone itwasneverusedinthewest butitisclosestinfunctiontoamodernpersonalcalculator 2theprintingpresswasusedtoprintmessagesfromtheemperortothepeople ithelpedtheefficiencyofgovernment gutenburg 1398 1468 begantoprintbooksonhispressabout1450adingermany 3awater poweredclockwasusedtomeasurethepositionandmovementofthestarsinthesky itdatesbacktothenorthernsongdynasty thewestdidnotevendiscoverthesunwasthecentreoftheuniverseuntilcopernicusinthefifteenthcenturyad youhavebeenaskedtowriteanentryforanencyclopediaaboutoneofthesethreechineseinventions chooseoneandpreparetowriteyourreport youwillincludeaphotographordrawing butyoumustexplainsomeimportantpointsinyourreport writing adescriptionoftheobjectwhatitwasusedforhowitwasusedwhenitwasinvented makesurethateachpointisanewparagraph makethefirstsentenceofeachparagraphatopicsentenceandthenaddalltheinformation finishthereportbystationwhenitwasproducedinchinaandwhenitwasfoundinwesterncountries asampleversion theabacusistypicallyconstructedofvarioustypesofhardwoodsandcomesinvarioussizes theframeoftheabacushasaseriesofverticalrodsonwhichanumberofwoodenbeadsareallowedtoslidefreely ahorizontalbeamseparatestheframe intotwosections knownastheupperdeckandthelowerdeck thestandardabacuscanbeusedtoperformaddition subtraction divisionandmultiplication theabacuscanalsobeusedtoextractsquare rootsandcubicroots theabacusispreparedforusebyplacingitflatontableorone slapandpushingallthebeadsonboththeupperandlowerdecksawayfromthebeam theheadsaremanipulatedwitheithertheindexfingerorthethumbofonehand eachheadinthe upperdeckhasavalueof5 eachbeadsinthelowerdeckhasavalueof1 beadsareconsideredcounted whenmovedtowardsthebeamthatseparatesthetwodecks after5headsarecountedinthelowerdeck theresultiscarriedtotheupperdeck afterbothheadsintheupperdeckarecounted theresult10is thencarriedtotheleft mostadjacentcolumnandsoon floatingpointcalculationsareperformedbydesignatingaspacebetween2columnsasthedecimal pointandalltherowstotherightofthatspacerepresentfractionalportionswhilealltherowstotheleftrepresentwholenumberdigits theabacusisoneofmanycountingdevicesinventedtohelpcountlargenumbers theearliestcountingdevicewasthehumanhandanditsfingers then aslargerquantities largertha