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AGuessingGamePlacePersonTime12121*ItwasapersonrememberedbymanypeopleintheUnitedStates.*ItwasafamouspersonwithwhosehelpalltheblackpeopleintheUnitedStatesgotequalrights.*Itwasapersonwhowasshotbythepersonthathatedhimwhilewatchingamovieinthetheatre.AbrahamLincoln*Theyarethekindofpeoplewhoarearoundyouwhenyouneedthem.*Theyarethekindofpeoplewhowillnotjudgeyoubyyourappearanceorwordsbutbyyourdeeds.*Theyarethekindofpeopletowhomyoumayturnforhelpwhenyouareintrouble.*Theyarethepeoplestronglybelieving“Afriendinneedisafriendindeed”.friends*Itisagreatplacewheresurfing,sailingandswimmingarepopular.*Itisacountrywhichcoversthewholecontinent.*ItisacountrywheretheSydneyOperaHouseislocated.*Itisaparadiseinwhichmanypeculiaranimalslive,suchaskangaroosandkoalabears.Australia•Itisathemeparkwhichattractspeopleofallages.•Itisathemeparkwhereyoucangetentertainedbyseeingthecastleofthesleepingbeauty.•Itisaparkwhereyouhavethechancetoseemanycartooncharactersandentertheiradventureworld.Disneyland*Itisaspecialdayforallofus.*Itisadaywhenallthefriendswillcometocelebrateitwithyou.*Itisadayonwhichyouwillreceivemanygiftssentbyfriends.BirthdayItemsKeywordsBeijingOlympics,holdpopulation,13millionpolicemenhard-workingturntoforhelpJune1stchildren,happyparents,celebrateitwithchildrencomputerbusiness,do,quicklyteleworking,possible2008(year)holdthe29thOlympicsvolunteertohelpTomborninBeijingfivefriends,3,inShanghaiDescriptionE.g.Beijingisthecity…()1.Theinternetisanetworkthatallowscomputerstocommunicateandshareinformation.()2.Amessageisoftensentasonepackettoanothercomputer.()3.Amessageisusuallybrokenintosmallpiecesandthensenttoitsdestination.()4.Informationcanonlybeintheformofwordsandimages.Listenanddecideifitistrueorfalse.TFTFTheinternetisavastnetwork_______allowscomputersaroundtheworldtocommunicateandshareinformation.Hugeamountsofinformation____theformofwords,images,soundsandcomputersoftwarearetransmittedthroughtheInternet.TheInternetlinkscomputersmainlybythetelephonesystem,throughcopperwires,opticalfibers,cablesorradiowaves.Accesstotheinternetbeginswithacomputer_________thetelephonelinesthroughadevicecalledmodem(调制解调器).Specialsoftwareisneededtoconvertcomputerfilesintothetypeofsignals_______cantravelthroughtelephonewires.BlankfillingthatinlinkedtothatThesignalsarethenlungedintothephonelinesthroughthemodem.Thephonelinesleadtoaninternetserviceprovideroracommercialonlineservice______actsasacounterwaytotheinternet.Computersbreakthemessageupintopackets,clustersof40toaround1500characters.Eachpacket,individually_______withitsdestination,isthensentthroughaseriesofcomputers________Routers（路由器）________directthepathofthepacket.EachRouterexaminesthepacketstoseewhereitisheadedandsendsitalongthebestpathtoitsdestination.Packets_______thesamemessagemaytakedifferentroutestoreachthesamedestination.Thepacketseventuallyallarriveatthesameplaceandarepiecedbackedtogetherintotheoriginalmessage.whichmarkedcalledthatfrommessagesfromthesendermessagestothereceivermodemRoutermodemMessages_________fromacomputeraretransmittedthroughthetelephonelines___________aseriesofcomputers______Routers.Themessagesarethen_______intosmallpacketsanddirectedtoitsdestinations.Afterthemessagesarriveatthecomputerofthereceiver,theyarepiecedbackintotheoriginalmessages.sentlinkedtocalledbroken1.HowdoestheInternetbenefitus?2.WhataretheproblemswefacewhenusingtheInternet?Homework:WritedownaparagraphabouttheInternetincludingthebenefitsitbringsusandtheproblemswhenusingit.messages