Unit 1 Living with technology Period 1 课件 3

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1、Unit1LivingwithtechnologyPeriod1课件3Unit1WelcometotheunitScienceandtechnologyplaysanimportantroleinexploringtheunknownfieldsandrealizingthedreamsofourancestors(祖先).Hightechnologyhasadirecteffectonourlife.Whatelectricalandelectronicappliances(电器)doyouhaveatho

2、me?Lead-inWhichdoyouthinkisthemostuseful?Whatelectricalandelectronicproductsdoyouuseinyourstudiesandinyourlife?Aretheyhelpfulorjustmakeyoulazier?discussionElectronicdictionariesgivestudentsquickresponsesintheirreading.Studentsusingelectronicdictionariesneed

3、lesstimeinreadingthanthosewhousepaperdictionaries.Moreover,electronicdictionariescanprovidecorrectpronunciationtostudents,whichapaperdictionarycannot.Thenumberofpeopleusingelectronicdictionariesisincreasinggreatly.Whatdoyouthinklifewouldbelikewithoutthesepr

4、oducts?DiscussionWhatconclusioncanyoudrawfromtheads?Manhasmaderemarkableprogressinthisareainthelastfewdecades.What’syouropiniononthis?●Theyareinventedtomeetpeople’sneeds.●Theyhaveimprovedpeople’slivestosomedegree.●Theyaredevelopingveryquickly.●Theradiationf

5、romsomeoftheelectricalandelectronicdevices,suchasmobilephones,maybeharmfultopeople’shealth.●Whenpeoplebuynewelectricalofelectronicdevices,theythrowawaytheoldones.Thismaygeneratelargeamountofwaste,whichisharmfultotheenvironment.Picture1:ComparetheTVinthepict

6、urewiththeTVinyourhome:1.antennaeontop2.thesmallscreen3.onlyblackandwhitepictures4.noremotecontrol(thecontrolpanelwasononesideofthescreen)DevelopmentofTVblack-and-whiteTVcolourTVLCDscreenPicture2:Howdidpeoplerecordmusicinthepast?Putthetapesintotherecorder,t

7、henplaythetapewithmusicatonesideandplaytherecordbuttonattheothersidetorecordthemusicontotheblanktape.Howdopeoplerecordmusicusingacomputer?CopythemusicfromaCDtothecomputerusingrecordingsoftware.ThemusicwillthenbedigitalizedandstoredinandplayedbyanMP3player.g

8、ramophone(留声机)radio/taperecorderMP3CDplayerDevelopmentofaudio(音响)devicedesktoplaptoppalmDevelopmentofcomputerPicture3:Howdoyoulookupawordinapaperdictionary?Thewordsinapaperdictionaryarearrangedinalphab