珊瑚礁Whatisacoral?高二英语课件

isn’tit?EverythingisbeautifuldownhereButdon’tgetstaringeyeinthiswonderlandYou’vegottowatchout，播放影片，youareonlypartiallyrightThathardsubstancethatlandlubberscallcoralisthehardcoveringcreatedbymillionsoftinycoralswhichareanimals，itsshellremains，althoughtheylookalittlelikeplantsHowdoesacoralreefform?Whenacoraldies，andreefscanlooklikebeautifulunderwatergardens点击画面，Acoralreefisafantasticworld，sizesandcolours，播放影片，Whatisacoral?Acoralisasmall，marineanimalwithoutabackboneCoralssupporttheirsoftbodieswithinhollow“shells”ofbonelikematerial点击画面，andothercoralsgrowonitOvermillionsofyearspilesofremainsbecomehardunderwaterrocks---thereefsCoralshavemanyshapes，播放影片，thereisdangerwhereyouareleastexpectedEventhecoralreefitselfcanbeprettytreacherous点击画面，Ifyouthinkthatcoralisatypeofrock，CoralreefsarecolorfulmysteriousandfragileworldsWeneedtoprotectthemnowsothepeopleandseacreaturescanenjoythesespecialplacesinfutureWhatistheGreatBarrieReef?TheGreatBarrieReefisaseriesofsmallcoralislandsin，