高二英语课件珊瑚礁Whatisacoral高二英语课件

Whatisacoral?Acoralisasmall,marineanimalwithoutabackbone.Coralssupporttheirsoftbodieswithinhollow“shells”ofbonelikematerial.点击画面，播放影片。Ifyouthinkthatcoralisatypeofrock,youareonlypartiallyright.Thathardsubstancethatlandlubberscallcoralisthehardcoveringcreatedbymillionsoftinycoralswhichareanimals,althoughtheylookalittlelikeplants.Howdoesacoralreefform?Whenacoraldies,itsshellremains,andothercoralsgrowonit.Overmillionsofyearspilesofremainsbecomehardunderwaterrocks---thereefs.Coralshavemanyshapes,sizesandcolours,andreefscanlooklikebeautifulunderwatergardens.点击画面，播放影片。Acoralreefisafantasticworld,isn’tit?Everythingisbeautifuldownhere.Butdon’tgetstaringeyeinthiswonderland.You’vegottowatchout,thereisdangerwhereyouareleastexpected.Eventhecoralreefitselfcanbeprettytreacherous.点击画面，播放影片。Coralreefsarecolorfulmysteriousandfragileworlds.Weneedtoprotectthemnowsothepeopleandseacreaturescanenjoythesespecialplacesinfuture.WhatistheGreatBarrieReef?TheGreatBarrieReefisaseriesofsmallcoralislandsinthePacificOcean.ItliesoffthecoastofQueenslandinnortheasternAustralia,anditisoneofthegreatnaturalwondersoftheworld.TheislandsoftheGreatBarrierReefregionofTropicalNorthQueensland,areAustralia抯crownjewels”.Queensland'sGreatBarrierReefislandsareideallysuitedforhoneymooners,families,divers,beachcombers-infactanyonelookingforanidyllic,exotic,sunkissedandpristineholidaydestinationthatisarareescapefromastressfulworld.Snorkel,diveorswimTheReefTheReefisabreedingareaforrareandendangeredspeciesEnjoyatouroftheGreatBarrierReefTheGreatBarrieReeffirstbecameknowntotheWesternworldthroughexplorationsofCaptainJamesCookinthe18thcentury.In1770hisshiptheEndeavourranagroundonareef20miles(32kilometers)fromland.TheEnd