高二英语Living with technology课件2 (2).ppt

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1、M7U1LivingwithtechnologyWelcometotheunitWhatelectronicproductsdoyouhaveathome?Whichdoyouthinkisthemostuseful?Why?Electronicappliancesrefrigeratorwashingmachinemicrowaveovenair-conditionerelectricricecookerdrinkingmachinewaterheatervacuumcleanermobilephonesdigitalcamerasMP4playerMP3p

2、layerelectronictranslatorelectronicdictionaryDoyouthinktheseproductshavemadeourlivesmoreconvenient?Why?Aretheyhelpfulorjustmakeyoulazier?Whatdoyouthinklifewouldbelikewithoutthem?Howhavedifferentelectronicdeviceschangedovertime?Thedevelopmentofsomeelectricdevices:developmentofTVblack

3、-and-whitescreencolourscreenLCDscreenWhatkindofaTVdoyouhaveathome?WhatotherfunctionsdoesamodernTVhave?EarlyTVwasin______________andhadbad________pictures.blackandwhitefuzzyWhatdifferencescanyoufindbetweentheTVinyourhomeandtheTVinthispicture?EarlyTVhadantennaeontop.The_____wasverysma

4、llandcouldshowonlyblack-and-whitepictures.ThesizeoftheTVwassmall_________withmodernTV,andusuallyitlookedlikea_______box.EarlyTValsodidnothavea________control.Thecontrolpanelwasononesideofthescreen.screencomparedwoodenremotecontroldesktoplaptop/notebookpalmtopdevelopmentofcomputerWha

5、tfunctionsdoesacomputerhave?…Nowwecanrecordmusicusingcomputers.Whatdidpeopleneedwhentheywantedtorecordmusicinthepast?Tapesandataperecorder.Lookatthepicture.Whatdevicesdopeopleneedtorecordmusicnow?Acomputer,anMP3playerandsomerecordingsoftware.HowdoPeoplerecordmusicusingacomputer?Peop

6、lecopythemusicfromaCDtothecomputerusingrecordingsoftware.ThemusicwillthenbedigitalizedinandplayedbyanMPPlayer.(数字化)digitalizeddevelopmentofdictionarydictionaryelectronicdictionaryDictionariesneverlookedlikethisbefore.Howdoyoulookupawordinapaperdictionary?Thewordsinapaperdictionaryar

7、earrangedinalphabeticalorderfrom‘A’to‘Z’.Weneedtolookatthefirstletterofthewordanduseittosearchinthedictionary.Iftwowordsstartwiththesameletter,welookatthesecondlettertodecidethealphabeticalorder.Ifthefirstandsecondlettersarethesame,welookatthethirdletterandsoon.Howmanyofyouhaveanele

8、ctronicdictionary?H