高二级lesson90(岭南画派纪念中学-彭夏桦).ppt

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1、WELCOME广州市七十六中彭夏桦Unit23TelephonesreadinglisteninginformationHomeworkLesson90discussionintroductionWhichwayisfasterandmoreconvenienttoconnectwithothers?ThedevelopmentoftelephonesAnswerthefollowingquestionsHowwasonetelephoneconnectwithanotherinthepast?Bythickheavywires.Howi

2、sonetelephoneconnectwithanothertoday?Bysatellites;byverythinglasspipes.Whenyouspeakintothetelephone,thewavesofyourvoiceandturnedinto_____A.ElectricalsoundsB.ElectricalsignalsC.LightsignalsBThehandleofanoldtelephonewasusedfor_______B.ConnectingwithanothertelephoneA.Produci

3、ngenoughelectricityC.GettingbetterelectricalsignalsAThejobofanoperatoris______A.towindthehandleforcustomersandchargethephonecalls.Toconnectthetwonumbers,totimeandchargethephonecalls.C.TomendtelephonesandtelephonewiresBThefirsttelephonedirectoryis____A.AnordinarybookB.Apie

4、ceofpaperC.AthickbookB_____canbeusetosendtelephonesignalsoverlongdistancesbysatelliteA.SoundwavesB.WaterwavesC.RadiowavesCNowadayswesend_____throughthin“pipe”connectingperson’svoicefromonetelephonetoanother.A.ElectricalsignsB.LightsignalsC.SoundwavesBQuestionsdiscussing1.

5、Whyweretelephonesnotpopularathebeginning?2.Whyweretelephonesexpensiveatthebeginning?3.Whydidyouhavetowindthehandlebeforemakingacall?5.Whatdoyoucallabookcontainingallthecustomerstelephonenumbers?6.Whataresatellitesusedfor?7.Whyarelightsignalsbetterthanelectricalsignals?4.W

6、hatdidthetelephoneoperatordo?Thetelephoneintheoffice1.Conferencecalling.2.Dialing.3.Redirection.4.Callwaiting.Whichtypethefollowingtelephonesdoyouwanttouseinthefuture?Why?MoreinformationabouttelephoneHomeworkP124Ex.1.2.GooverLesson90Goodbye