下学期unit12reading高二英语课件
日期：2010-05-21 05:52
byBenlinjaminFrank2Howwasitusedinthefollowingtwohundredyears?1)industry:controlmachinesandproduceagreatnumberofproducts，suchascarsandplanes2)agriculture:controlthetemperatureandhumidity(湿度）tomakecropsgrowbetter3)Ourdailylife:watchingTV，Whoisthefatheroftheseinventions?electricrailwayThefirstelectricrailwaywasbuiltbyGermanWernervonSiemensin1879lightbulbTheelectriclightbulbwasinventedbyThomasAlvaEdisonintheUnitedStatesin1879steam-poweredboatThefirststeam-poweredshipwasdevelopedbyJamesWattin17691Whenwaselectricitydiscovered?in1600byGilbert(吉尔伯特)iinin1752，playingcomputersandsoonDoyouknowthescientistandtheapplication(应用）ofelectricity:yearscientistinvention1844–Morsetheradio1876–Belltheelectricbattery1821–Faradaytheelectricmotor1752-Franklinthetelegraph1904–Teslathetelevision1928–Bairdthelighteningrod1800–Voltathetelephone3Intheearly19thcentury，peoplehadnoideawhattheinsideoftheearthmi，
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