unit12readingwordingformation课件
日期：2010-04-28 04:37
electricityisveryusefulForexample，electricityisveryimportanttousAfterelectricitywasdiscovered，Unit12FactandFantacyreadingWord-formationReading1pre-reading:Whocansaywhentheinventionsinthepicturesweremade?Electricrailwaywasinventedintheearlyyearsofthe20thcentury:ThomasEdisoninventedthelightbulbin1879Steam-poweredboatwasmadein1807Groupwork:Discussthequestions1Whenwaselectricitydiscovered?2Howwasitusedinthefollowingtwohundredyears?3Intheearly19thcentury，peopleuseittocontrolmachinesandproduceagreatnumberofproducts，suchascars，planes，weapons，peoplehadnoideawhattheinsideoftheearthmightlooklikeCanyouexplainwhatweknowaboutittoday?2，watchingTVneedselectricity，heatersneedelectricity，Electricitywasdiscoveredin1600byGilbertElectricityisalsousedinagricultureWithelectricitypeoplecancontrolthetemperatureandhumiditytomakevegetablesgrowbetterInourdailylife，etc 1，playingcomputersneedselectricity，peoplebegantouseittoservepeopleinmanyfieldsTakeindustryforexample，andevenourwatchesneedelectric，
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