2024/4/16高中英語多媒體課件

TELEPHONESUNIT23Answerthefollowingquestions1.Howwasonetelephoneconnectedwithanotherinthepast?2.Howisonetelephoneconnectedwithanothertoday?BythickheavymetalwiresByverythinglasspipesandsatelliteelectricalsignalselectricalsignalsHowdoesatelephonework?

Whydidpeoplehavetowindthehandlebeforemakingacall?

Whatdidthetelephoneoperatordo?

Whataresatellitesusedfor?AmericaChinaelectricalsignalselectricalsignalsWhatwasthewaytosendsignalsinthepast?metalwires

lightsignalslightsignalsHowtosendsignalsnow?thinglasspipestoonoisy!notclear!veryclearelectricalsignalselectricalsignalsconferencecallingABCDEcallwaiting

ABCABBcredirectionFindsomewordstocompletethesentences:Ifyoudon’tknowthetelephonenumberofacertainunit,youmaylookitupinthetelephoned________.2.Thiskindoffoodwills__________youupafteryourillness.3.Pleaser________alltheletterstothefollowingaddresses.

irectorytrengthenedirect

4.Wehaveplentyofrainhere,Itrainsf__________inthispartofthecountry.5.Youmustw______theclockonceaweek,oritwillstop.requentlyindCompletethefollowingsentences

1.________________________________(他怎樣到美國來的)wasamystery.2.____________________________________________(我們是否應(yīng)該穿校服)hasnotbeendecided.3.Ididn’treceivethenews________________________________(會議時(shí)間推遲了）4.Theproblemis______________________________________________(電信號會變得越來越弱）

astheytravelalongmetalwires.

HowhecametoAmericaWhetherweshouldwearschooluniformsthatthemeetinghadbeen.delayedthatelectricalsignalsgetweakerandweaker

Ifyouhavegotenoughmoney,whichofthefollowingthingsdoyouwanttoh