选修7Unit3-Under-the-sea--Warming-up

UndertheSeaWarmingupUnit3Today,we’regoingtotakealookattheworldunderthesea.So,areyouready?Now,weareonasnorkelingtripunderthesea.We’llcomeacrossagreatvarietyofmarine[mə'rin]animals海洋动物.Comeon!Dolphins海豚Whatarethey?Seaturtle海龟Look.It’scomingtowardsus.Seahorse海马What’sthis?Squid鱿鱼：[skwid]Seastar海星Thislooksbeautiful!Jellyfish水母：['dʒelifiʃ]Coral珊瑚：['kɔrəl]Angelfish天使鱼：['eindʒəl]DifferentkindsoflittlefishAnemonefish海葵鱼：[ə'nemə,ni]Clownfish：[klaun]葵鱼，白头翁鱼parrotfish鹦鹉鱼Whitewhale白鲸Killerwhale虎鲸seahorse海马clam蛤Asharkiscoming.Lookout!It’sdangerous.Henoticedus.We’dbetterleavehimalonebeforeit’stoolate.Bye,MrShark!Wearesafenow.AndIcaughtaseastarneartheshore.Ifyoulike,wherecanyougotoseemoreabouttheoceanlife?onaboattripatanaquariumonasnorkellingtrip•Onasnorkelingtrip•Atanaquarium•Onaboattour•Inbooks•Infilms•OnTVnatureprogrammes•OntheInternetWhat’shappeninginthepictures?AKillerWhaleWhalesarehuge,intelligentseamammals.：['mæməl]哺乳动物Theybreatheairthroughblow-holesintolungs(unlikefishwhobreatheusinggills)：[gil](鱼)鳃.Whaleshavesmooth,shiny,streamlined(流线型）bodiesthatmoveeasilythroughthewater.Whatisawhale?Therearetwotypesofwhalesalivetoday:toothedwhales(齿鲸类)andbaleenwhales(须鲸类).Toothedwhaleshaveteethandasingleblowhole.Theyfeedoneatingfishandotherseamammals.Baleenwhalesarelargerthantoothedwhales.Theyarefilterfeeders(滤食者)thatusebaleentosieve(过滤)food,andhavetwoblowholes.ClassificationofwhalesKillerwhales(虎鲸)belongtotoothedwhales,whoarethekingofthesea,biggestcarnivore(食肉动物)ofthesea,killingallkindsofanimalsinthesea,eventhehugebluewhale,liketigersonland,workinginateam.Averagelifespan:50to80yearsSize:7to9.7mWeight:upto6tonsKillerwhalesBaleenwhalesarecharacterizedbyhavingbaleenplatesforfilteringfoodfromwater,ratherthanhavingteeth.Baleenwhalesaregenerallylargerthantoothedwhales,andfemalesarelargerthanmales.Thisgroupincludesthelargestknownanimalspecies,theBlueWhale.Baleenwhales______whale______whales_________________Whatishappeninginthepicture?Thekillerwhaleshelp/assistthewhalerscatchbaleenwhales.killerbaleenwhalersblow-hole