2014年高二英语(人教版选修7)教学精品课件：Unit 3 Period Ⅰ

【美文阅读】广袤无垠的海洋，孕育了无数生命传奇，以其独有的神秘吸引着人类对其进行不懈的探索。为此，海洋科学家通常把海洋分为五个区域。现在就让我们一起了解一下吧！Theearth'soceanscanreachdepthsofupto11,000metres.ThatisdeepenoughtocoverMt.Qomolangma！Theoceansareincredibly(不可思议的)largeandcontainseveraldifferenthabitats.Tomakeiteasiertodescribethevariouspartsoftheoceans，marine(海上的)scientistsusuallydividetheoceansintofivezones.Eachzoneisdifferentmainlyasaresultofhowmuchsunlightreachesit.Mostofthelifeintheoceancanbefoundinthefirstzone，whichbeginsatthesurfaceandgoesdownabout200metres.Becausethereissunlightatthislevel，plantsareabletogrow.Marineanimalssuchasdolphins，sharks，seaturtlesandsealions，andofcourseavarietyoffish，liveinthesunlit(阳光普照的)partoftheocean.Itisdifficulttohidefromotheranimalsinthisarea.Thesecondzonestartsat200metresandgoesdowntoabout1,000metres.Somesunlightcanreachthislevel，butitisnotenoughforplantstogrow.Becausethiszoneisrelativelydark，manyofthecreaturesthatlivehereareabletomakelightwiththeirbody.Thelightfromtheseanimalsmakesthewaterlooklikeaskywithmovingstarsinit.Thethirdzoneoftheoceanisdark.Thisplace，about3,000metresdeep，maynotseemalikelyhabitat，buttherearemorecreaturesherethanonemightthink.Mostoftheanimalsthatlivehereareblackorredbecauseofthelackoflight.Below4,000metres，thetemperatureisnearfreezingandthereisnolightatall.Infact，thezoneissodarkandemptythatscientistsnamedthiszoneaftertheGreekwordfor“nobottom”．Thereisnotmuchlifetobefoundinthiscoldandunpleasantpartoftheocean，butsomesmallcreaturesstillmanagetosurviveheredespitethehighwaterpressure.Theverydeepestpartoftheoceanisfound2,000metresfurtherdown.Atthisdepth，thewaterpressureisextremelyhighandlifeisverydifficultforthefewcreaturesthatlivehere.Comparedtotheotherzones，thisonehasverylittlelife.Sincethereisnolighthere，someoftheanimalsdonothaveeyes.Nexttimeyoulookattheoceanfromthebeachoronamap，rememberthatwhatyouareseeingisonlythesurface－onlythebeginningofthelargeandvariedadventure.【诱思导学】1．Whydotheseanimalslivinginthesecondzonemakethewaterlooklikeaskywithmovingstarsinit?2．Doyouthinkitispossibleforsomecreaturesthatliveintheverydeepestpartoftheoceantoseeeachother?【答案】1.Becausemanyofthemareabletomakelightwiththeirbody.2.No.Becausethereisnolighthereandsomeoftheanimalshavenoeyes.教师用书独具演示●教学目标初步掌握本课文中的词汇，浅层次理解课文，了解相关的背景知识。本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，让学生在下一堂课中对课文的全面理解起到一个铺垫作用。PeriodⅠPreviewing●教学地位本单元的中心话题是“海底世界”。听说读写等活动主要围绕海底动植物、海底奇妙景观，以及有关大海的神话故事展开。本单元引导学生讨论这些话题，目的在于让他们了解海底世界的博大与奇妙。从而增强保护海洋和开发利用海洋的意识。●新课导入建议可以通过讨论教材第19页的图画引导学生了解这些海底动植物。培养学生热爱和保护海洋生物的意识。●教学流程设计演示结束Ⅰ.篇章结构阅读文章，然后完成下面表格(每空不超过3词)ThemainideaofthetextI1.ascenewhereOldTom，thekillerwhale，helpedthewhalerscatchthehugewhales.Time2.DetailsofthestoryOldTommadealoudnoise，3.usthattherewasawhaleoutthereforus.Wejumpedintotheboatandheadedoutintothebay.OldTom4.ustheway.Asweapproached，thekillersovertherewerethrowingthemselves5.thewhale'sblowholetostopit6.，andtheotherswerestoppingitdivingor7．outtosea.Onemanaimedatthewhaleandhisharpoonhitthespot.Thewhale'sbodywas8．bythekillersdownintothe9．ofthesea.Wewenthomeandintendedtogetthewhale'sbodythenextday.Inthefollowing24hours，thekillerswouldhaveagoodfeedonits10..【答案】1.witnessed2.Oneafternoon3.telling4．showed5.ontopof6.breathing7.fleeing8．dragged9.depths10.lipsandtongueⅡ.语篇理解阅读P20－21的Reading部分，从每题所给的3个选项中选择最佳答案1．Whofirstshoutedthatthekillerwascoming?A．Thewriter.B．James.C．George.2．WhichofthefollowingisTRUE?A．OldTomandhisfriendswerehelpfultothewhalers.B．OldTomwas70yearsold.C．OldTomneverdidanyfavorforthewhalers.3．Whydidthekillersthrowthemselvesontopofthewhale'sblowhole?A．Toprotectthewhale.B．Tohelpthewhalerunaway.C．Tostopthewhalebreathing.4．Thewhalersreturnedhomewithoutthewhale'sbodybecause.A．itwastooheavytocarryB．theydidn'tcatchthewhaleC．itwouldn'tfloatuptothesurfaceforaround24hours5．OldTomhelpedJamesby.A．hugginghiminthewaterB．keepingthesharkawayfromJamesC．holdingupJamesinthewater【答案】1－5CACCCⅢ.课文缩写用所给单词或短语的正确形式完成课文缩写Ihadheardofthekillersthathelpedwhalerscatchhugewhales.WhenIworkedatawhalingstation，I1.itmanytimes.Oneafternoon，Iheardaloudnoisecomingfromthebay.Werandowntotheshore2.timetoseeanenormousanimalthrowingitselfoutofthewater.George，oneofthewhalers，toldmethatitwasOldTom，thekiller，whowastellingusthere'sawhale.Anotherwhaler3.outto4.awhalehunt.Weimmediatelyheadedoutintothebay，withOldTom5.ustheway.Usingatelescopewesawthatseveralkillers6.thewhalewerethrowingthemselvesontopofthewhale'sblowholetostopit7.，whileotherswerestoppingitdivingor8.outtosea.Thenthemaninthebowoftheboataimedatthewhaleandkilledit.Thesekillers9.harmedorattackedpeople.Oncewhenwewereinthebay，theseawas10.，forwhichJameswascarriedawaybywaves.Worsestill，therewasashark.Fortunately，OldTomrescuedJames.【答案】1.witnessed2.in3.yelled4.announce5．showing6.over7.breathing8.fleeing9.never10.roughⅠ.词义搭配1．urgeA．tojumpintothewaterheadfirst2．pauseB．torunaway；toescape(esp.fromdanger，threatetc)3．witnessC．tostronglyrecommendorsuggest4．abandonD．shortstopwhiledoingorsayingsomething5．yellE．tobepresentatsth.andseeit6．dragF．togiveupcompletely7．fleeG．toutteraloudsharpcryorcriesasofpain，exciteme