Unit1LivingwithtechnologyReading2Teachingaims:Studentswilllearntousesomeimportantphrasesandkeywords
Teachingprocedures:Step1Importantphrases•Theevolutionofvideoandsounddevices•shortlyafterwards•contributedtothedevelopmentofTV•wasveryprimitiveandhadmanydrawbacks•madeimportantbreakthroughsinthedevelopmentoftheTV•inthelate1920sandearly1930s•adoptmanyoftheprinciples•constructedthefirstcolourTV•regularcolourTVbroadcastsweredelayed•withinashorttime•SatellitesallowliveTVprogrammestobebroadcast•overvastdistances•makeTVaccessibletopeoplewholivefarawayfromcities•throughoutthecountrysideandtheremoteareas•asmallpercentageofpeople•benefitfromsatelliteTV•broadcastthesignals•madethefirstrecordingofahumanvoice•usedroundtubestorecordon•useddiscsasalternativetotubes•bewoundupbyhand•Timessurehavechanged