Unit+5+A+delicate+World+Understanding+ideas+課件【高效備課精研+知識(shí)精講提升】 高中外研版（2019）選擇性必修第二冊(cè)

UNIT5Adelicateworld---understandingideas1.Studentscouldlearnsomewordsandphrases.2.Studentscouldundestandthemainusageofthispassage.3.Studentscouldwritesomeapassageaboutthispassage.LearningAims:Whatisyourunderstandingofthisgrammar？Shareyouideaswithothers麥夸里島：從混亂到保護(hù)MACQUARIEISLAND:fromChaostoConservationBeforelearning,pleasetrytomakeapredictionofthispassage.MACQUARIEISLAND:fromChaostoConservationBrainstorming:Beforereadingthispassage,whatideascometoyourmind?1.somepollution2.disaster3.hopesTrytowriteyouropinionsinyournotebook!MACQUARIEISLAND:fromChaostoConservationWhatanimalscanyouseeinthepicture?penguinsMacquarieIsland麥夸里島MACQUARIEISLAND:fromChaostoConservationWhatcanwelearnfromthisparagraph?ThegreengrassandbarerockofitslandscapeonMacquarieIslandformitsbeauty.1IamstandingonMacquarieIsland,intheSouth-westPacificOcean,halfwaybetweenAustraliaandAntarctica.Strongwindsandstormyseashavehelpedsculptitslong,thinshape.Thegreengrassandbarerockofitslandscapecontrastdramatically,givingitawildandnaturalbeauty.NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.Norwouldtheyfailtoimaginehowitsnativeinhabitants,includingroyalpenguins,kingpenguins,andelephantseals,existedinperfectharmonywiththeirnaturalhabitatforthousandsofyears.Takenotesquickly！重點(diǎn)詞匯MacquarieIsland麥夸里島;South-west西南;西南方;西南地區(qū)PacificOcean太平洋greengrass綠草;青草；青；芳草barerock裸巖;裸露巖石WorldHeritageSite世界遺產(chǎn)保護(hù)區(qū)failto未能;使…失望inperfectharmony完美和諧;Whatisthemeaningofthisunderlinedword?隨后，后來2Buttheisland’smorerecenthistorytellsadifferentstory.It’satragicstorythatbeganin1810whenhumansarrivedontheisland.Intheirshipstheyunknowinglybroughtratsandmice.Thesesmallanimalsquicklytookovertheisland,eatingthebirds’eggsandattackingbabybirds.Catswerebroughttotheislandtocontroltheratsandmice.Unfortunately,thecatssubsequentlydevelopedanappetiteforthebirds,too.Takenotesquickly！重點(diǎn)詞匯tragic悲慘的，unknowingly未意識(shí)到地;不知不覺地;無意中micemouse的復(fù)數(shù)eggs蛋;卵;attacking襲擊;攻擊subsequently隨后;后來;之后;接著appetite食欲;胃口;強(qiáng)烈欲望原生植被3Meanwhile,rabbitswereintroducedtotheislandasasourceoffoodforhumans.Looseontheisland,theydidwhatrabbitsdobest–theymultipliedrapidlyandbeganeatingthenativevegetationanddiggingholes,whichcausedsoilerosion.Theexplodingrabbitpopulationprovidedplentifulfoodforthecats,meaningthatthenumberofcatsalsoincreased.Thisinturnledtomorecatshuntingthebirds.Theendresultwasthatparakeets,oncelargeinnumberandnativetotheisland,diedoutin1891.Whatisthemeaningofthisunderlinedword?Takenotesquickly！重點(diǎn)詞匯nativevegetation原生植被；土著植被dig掘;鑿;挖;explode爆炸;爆破;plentiful大量的;眾多的;充足的;豐富的inturn依次，輪流，endresult最終結(jié)果parakeets長尾鸚鵡innumber數(shù)量上;總共4EvenafterMacquarieIslandbecameanofficialnaturereserveinthe1970s,therabbitsremainedoutofcontrol.Expertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.Withthisgoalinmind,aviruswasreleasedontotheisland.Butalthoughtheviruscausedtherabbitpopulationtodecreasefrom130,000toaround10,000,italsomeantlessfoodforthecats.Thecatsinconsequenceturnedtheirattention–andtheirstomachs–backtothenativebirds,killingupto60,000eachyear.Inthe1980s,trapsanddogswereusedtocatchthecats.ThelastMacquarieIslandcatwascaughtin2000.釋放Whatisthemeaningofthisunderlinedword?Takenotesquickly！重點(diǎn)詞匯MacquarieIsland麥夸里島;naturereserve自然保護(hù)區(qū)outofcontrol失去控制;失去控制;comeupwith想出，提出;趕上，removeall刪除所有;decreasefrom從減少;upto一直到;usedtodo曾經(jīng)Butasthesayinggoes,“Whilethecat’saway,themicewillplay.”Withthedepartureofthecatsfromtheisland,themouseandratpopulationstartedtoincrease.Andrememberthose10,000orsorabbits?Itturnedoutthattheydevelopedanimmunitytothevirus,andtheirnumbersexplodedonceagain.Then,in2006,therabbits’diggingcausedsomelandtocollapse,andkilledasubstantialnumberofpenguins.Thisincidentmadeitclearthattherat,mouseandrabbitproblemneededsolvingonceandforall.貓兒不在，老鼠作怪Whatisthemeaningofthisunderlinedword?Takenotesquickly！重點(diǎn)詞匯asthesayinggoes像俗話說的那樣rabbits兔;野兔turnedout…裝束的;…打扮的immunity免疫;免疫力;豁免;受保護(hù);免除exploded分解的;爆炸onceagain再一次，dig掘;鑿;penguins企鵝;onceandforall徹底地6So,IamhereonMacquarieIslandtoparticipateintheprogrammetotacklethisveryproblem.Thefirststepinvolvedpoison

beingdroppedfromhelicopters.Thenextstepistoremovethelastremaininginvadingspecies,andthat’swhereIcomein–withmydogs.Theyhavebeentrainedtofindeverylastone,withoutharmingthenativeanimals.Thisinterventionisalong,much-delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.毒藥Whatisthemeaningofthisunderlinedword?Takenotesquickly！重點(diǎn)詞匯MacquarieIsland麥夸里島;participatein參與;分擔(dān)；參加invade武裝入侵;侵略;andthat而且，并且comein進(jìn)來吧;harming傷害;損害;ahappyending大團(tuán)圓結(jié)局;Whatwasthecauseofsoilerosion?A.Rabbitswereintroducedtotheisland,multiplyingrapidlyanddiggingholes.B.Parakeets,nativetotheisland,diedoutbecauseofhumans’activities.C.Theinere