牛津高中英语 模块3 Unit 1 project

Unit1,Project,ProducingaTVshow,Sharkattacks,SharkSpecies,Whaleshark,Bullshark,Greatwhite,Tigershark,OthersharkfactsSharkshavefivetosevengillslits(鳃裂).Manysharksmustkeepmovinginordertobreathethatis,inordertokeepwatermovingpasttheirgillslitsbutthisisnottrueofallspecies.Nursesharks,forexample,canliestillandfantheirgillstobringoxygen-richwateracrosstheslits.Becausetheylackaswimbladder(气囊),allsharksmustswiminordertoavoidsinkingtowardtheoceanfloor.,Thesharkhassensesspeciallyadaptedfortheanimalslifeunderwater.Smellisasharksmostacutesense.Approximately70percentofthesharksbrainisusedforsmellingfunctions.Experimentshaveshownthatsharkscandetectanimalsbysmell.,Sharksaresensitivetolightandcandetectcertainobjectseveninmuddywater.Somehaveamirror-likelayerundertheretina(视网膜)oftheeyethatreflectsincominglightandincreasestheamountoflightavailabletotheeye.(Catsandotheranimalswhoseeyesglowinthedarkalsohavethisfeature.),Sharkscanalsosenseelectricandmagneticfields.Sensoryporeslocatedonthesharksheadcandetectapreysbioelectricfieldevenifthepreyisburiedinsand.AsharkcanalsodetecttheEarthsmagneticfield.Open-oceansharksmayusethisinformationtonavigate(导航)andorient(定位)themselves.,Sharkwaterisa2006CanadiandocumentaryfilmwrittenanddirectedbyRobStewart,whoalsonarratesit.Inthefilm,Stewartseekstodeflatecurrentattitudesaboutsharks,andexposeshowthevoracious(贪吃的,胃口极大的)shark-huntingindustryisdrivingthemtoextinction.,Document,Readingformainidea:Para.1Therearenearly400typesofsharks,andsomewell-knowntypesofsharksthatattackhumans.Para.2ThreetypesofsharkattacksPara.3FourtipsonhowtoavoidbeingattackedPara.4Anincreaseinwatersportshasledtoanincreaseinsharkattacks.Threetipsonwhattodoifasharkattacks.Para.5:Donotbefrightenedbysharks.,Thewonderfulworldofpigeon,Fromancienttimes,pigeonsespeciallyhomingpigeons,whicharealsousedasracingbirdshavebeenusedforcarryingmessages.Althoughelectronicshaslargelyreplacedthemasmessengers,theyarestillofexperimentalimportance.,Readingforquestions:Whatdoesthearticle