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外研版英语·必修第三册返回导航下页上页外研版英语·必修第三册返回导航下页上页单元知识目标(1)重点词汇：press;shoot;flexible;capable;stuff;desire;passive;beyond;significant;injure;accurate;minor;origin;species;extraordinary;brilliant;theory;mental;cure;declaration;experiment;fiction;metal;attach;flash;conduct;entirely;account;proof;procedure(2)重点短语：inaddition;neversaynever;intermsof;takeplace;comeupwith(3)单元语法：现在完成时的被动语态(4)单元写作：实验报告外研版英语·必修第三册返回导航下页上页课前·情境导入外研版英语·必修第三册返回导航下页上页本杰明·富兰克林不仅是记者、作家、慈善家，更是杰出的外交家及发明家。他是美国独立战争时重要的领导人之一。本杰明·富兰克林曾经进行多项关于电的实验，并且发明了避雷针，最早提出电荷守恒定律。让我们通过下文一起了解本杰明•富兰克林的一系列的实用发明物吧！外研版英语·必修第三册返回导航下页上页AlistofBenjaminFranklin'sinventionsrevealsamanofmanytalentsandinterests.Hisnaturalcuriosityaboutthingsandthewaytheyworkmadehimtrytofindwaystomakethemworkbetter.Benhadpoorvisionandneededglassestoread.Hegottiredofconstantlytakingthemoffandputtingthembackon，sohedecidedtofigureouthowhisglasseswouldlethimseebothnearandfar.Hehadtwopairsofglassescutinhalfandputhalfofeachlens(镜片)inasingleframe.Today，wecallthembifocals(双光眼镜)．外研版英语·必修第三册返回导航下页上页EveryoneknowsthestoryofBen'sfamouskiteflight.Althoughhemadeimportantdiscoveriesandadvancements，Bendidnot“invent”theelectricity.Hedid，however，inventthelightningrodwhichprotectsbuildingsandshipsfromlightning.IncolonialAmerica，mostpeoplewarmedtheirhomesbybuildingafireinafireplaceeventhoughitwasdangerousandusedalotofwood.Benfiguredthattherehadtobeabetterway.Hisinventionofanironfurnacestoveallowedpeopletowarmtheirhomeslessdangerouslyandwithlesswood.ThefurnacestovethatheinventediscalledtheFranklinStove.Interestinglyenough，Benalsoestablishedthefirstfirecompanyandthefirstfireinsurancecompanyinordertohelppeoplelivemoresafely.外研版英语·必修第三册返回导航下页上页Asapostmaster，Benhadtofigureoutroutesfordeliveringthemail.Hewentoutridinginhiscarriagetomeasuretheroutesandneededawaytokeeptrackofthedistance.Heinventedasimpleodometer(里程表)andattachedittohiscarriage.Later，otherfamousinventors，likeTomasA．EdisonandAlexanderGrahamBell，followedinBen'sfootstepsbytryingtofindwaystohelppeoplelivebetter.