聽力教程第二版第二冊unit5答案

1、Unit5SectionOneTacticsfListeningPart2listeningNotetakingReadingB:WhenshouldachildstartlearningtoreadwriteThisisoneofthequestionsIammostfrequentlyasked.Thereisnohardfastrulefnotwoarealikeitwouldbewrongtosetatimewhenallsho

2、uldstartbeingtaughttheinsoutsofreadingletterstofmwds.Ifathreeyearoldwantstoread(evenatwoyearoldfthatmatter)thechilddeservestobegiveneveryencouragement.Thefactthatheshemightlaterbe“bed“whenjoiningaclassofnonreadersatinfan

3、tschoolistheteachersaffair.Itisuptotheteachertoseethatsuchachildisgivenmeadvancedreadingmaterial.Similarlythechildwhostillcannotreadbythetimehegoestojunischoolattheageofsevenshouldbegiveneveryhelpbyteachersparentsalike.T

4、heyshouldmakecertainthatheisnotdyslexic.Ifheisspecialisthelpshouldimmediatelybesought.Althoughparentsshouldbecarefulnottofceyoungstersagedtwotofivetolearntoread(ifbadlydoneitcouldputthemoffreadingflife)thereisnoharminpre

5、paringthemfsimplerecognitionoflettersbylabellingvariousitemsintheirroom.FinstancebyanicepieceofcardboardtiedtotheirbedwithBEDwritteninneatbigletters.ShouldtheyoungchildaskhisparentstoteachhimtoreadiftheparentsM1KE:Sodigi

6、talislikelotsofsht“pieces“ofsound.KATHY.Exactly.Thisisdifferentfromanalogthatshowtheyusedtorecd.Analogismelikeonewaveofsound.Itmovesupdownwithvolumepitch.Anywayanalogislikeasinglewave.Digitalislikeaseriesofpieces.MIKE:OK

7、Iunderstthat.ButhowdotheymaketheCDsKATHY:ItoldyouMike.Theygetabunchofmusicianstogethertheysingplay.MIKE:Kathy!KATHY:No.Whatreallyhappensisfirsttheydoadigitalrecdingonvideotape.MIKE:Onvideotape.KATHY:Yeahtheyusevideotape.

8、Sothenthevideotapeisplayedthroughacomputer.MIKE:OK.WhatdoesthecomputerdoKATHY:Wellthecomputerisusedtofigureoutthe“pieces“ofsoundweweretalkingabouthowlongeverythingishowfarapartspacesare.MIKE:OK.Sothecomputerisfiguringout

9、thoseseparate“pieces“ofsound.KATHY:Yeah.Theyneedtodothattomakethemaster.MIKE:ThemasterKATHY:ThemasteristheiginalthatalltheotherCDsarecopiedfrom.Itsmadeofglass.ItsaglassdiskthatspinsaroundjustlikearegularCD.theglassdiskis

10、coveredwithachemical.Theyusealasertobumthesignalthesongintotheglassplate.Thelaserburnsthroughthechemicalbutnotthroughtheglass.MIKE:Sothelasercutsthesoundintotheplate.KATHY:Right.Whatitsdoingiscuttinglittleholes.intotheba

11、ckofthedisk.Thoseholesarecalled“pits.“Thelaserputsinthepits.MIKE:SoCDsreallyhavelittleholesonthebackIdidntknowthat.KATHY:Yeah.Tinypits.Theyretoosmalltosee.[Pause.]Anywaythentheyvegotthemastertheymakecopiesfromit.Thenyoub

12、uyyourcopyputitintheCDplayer.MIKE:PutitintheCDplayer...ThatpartIunderst.KATHY:TheresanotherlaserinyourCDplayer.ThelightofthelaserreflectsofftheCD.ThesmoothpartoftheCDreflectsstraightbacklikeamirr.Butthelightthatbouncesof

13、fthepitsisscattered.AnywaythecomputerinyourCDplayerreadsthelightthatbouncesoffthepits.yougetthemusic.MIKE:Reflectedlighthuh...Uh...youknewwhatIlikeJustrelaxinglisteningtomusicnotreallywryingabouthowitgetsonthedisk.KATHY: