NCE3Lesson-17_the_longest_suspension_bridge_in_the_world

Unit17,悬索桥(吊桥)（suspensionbridge),指的是以通过索塔悬挂并锚固于两岸(或桥两端)的缆索(或钢链)作为上部结构主要承重构件的桥梁。Basicwordstodescribethesuspensionbridgespan跨度(n)cable缆索concreten.混凝土suspendv.悬挂lengthn.根，段tower索塔,Newwordsandexpressions,Suspension(n.)Suspend(v.)besuspendedfrom悬挂于eg:ThebridgehasbeensuspendedfromthecablesThelightissuspendedfromtheceiling.suspense(n.):担心、挂念、悬念suspendersAgreeableadj.宜人的eg:Todayisagreeableagreeablesituation.,WhatkindofpeopleisVerrazano?Whatdidhedoin1524?HowdidhedescribeNewYorkharbor?Whyhisnamewillprobablyremainimmortal?WhodesignedtheVerrazanoBridge?,Readpra.1andthinkabout,Verrazano,anItalianaboutwhomlittleisknown,sailedintoNewYorkHarbourin1524andnameditAngouleme.Hedescribeditasaveryagreeablesituationlocatedwithintwosmallhillsinthemidstofwhichflowedagreatriver.ThoughVerrazanoisbynomeansconsideredtobeagreatexplorer,hisnamewillprob-ablyremainimmortal,foronNovember21st,1964,thegreatestbridgeintheworldwasnamedafterhim.,WhodesignedtheVerrazanoBridge?Howlongisit?Whytheshapeoftheearthhadtobetakenintoaccount?Whatsupportfourhugecables?Whatkindofplatformarethetowersbuilton?Howdeepistheplatform?,Readpra.2andthinkabout,Isitaneasyworktobuildthisbridge?Whatistherelationshipofthetowers,cablesandbridge?Willthebridgefalldownifthebridgewerepackedwithcar?Whatisthedesignersdreamtocreat?,Readpra.2andthinkabout,TheVerrazanoBridge,whichwasdesignedbyOthmarAmmann,joinsBrooklyntoStatenIsland.Ithasaspanof4260feet.Thebridgeissolongthattheshapeoftheearthhadtobetakenintoaccountbyitsdesigner.Twogreattowerssupportfourhugecables.Thetowersarebuiltonimmenseunderwaterplatformsmadeofsteelandconcrete.Theplatformsextendtoadepthofover100feetunderthesea.Thesealonetooksixteenmonthstobuild.Abovethesurfaceofthewater,thetowersrisetoaheightofnearly700feet.Theysupportthecablesfromwhichthebridgehasbeensuspended.Eachofthefourcablescontains26,108lengthsofwire.Ithasbeenestimatedthatifthebridgewerepackedwithcars,itwouldstillonlybecarryingathirdofitstotalcapacity.However,sizeandstrengtharenottheonlyimportantthingsaboutthisbridge.Despiteitsimmens