tpo1 31閱讀答案詳細(xì)tpo27 r

TPO27-R-Predator-PreyHowdopredetorsaffectpopulationsthepreyanimals?TheanswerisnotToprovideanexampleofmovingtonewhabitatsbyfollowingmigratingpreyToshowthattheinteractionsbetweenpredatorpopulationsandpreypopulationsarenotalwayswhatmightbeexpectedTosuggestthatpreypopulationsaresimpleasTPO27-R-Predator-PreyHowdopredetorsaffectpopulationsthepreyanimals?TheanswerisnotToprovideanexampleofmovingtonewhabitatsbyfollowingmigratingpreyToshowthattheinteractionsbetweenpredatorpopulationsandpreypopulationsarenotalwayswhatmightbeexpectedTosuggestthatpreypopulationsaresimpleasmightbethought.reachedIsleRoyaleinLakeSuperiorcrossingoverwintericeandfreelythereinisolationpredators.Whenwolveslatertheisland,naturalistswidelythatthewolveswouldplayakeyrole controllingthemooseCarefulstudieshaveavailabilityandToarguethatstudiesofgeographicallyisolatedpopulationstendnottobeusefultohowever,thatthisisnotthecase.wolveseatmostlyoldoranimalsthatwouldnotsurvivelonganyway.Ingeneral,themoosepopulationiscontrolledbyfoodParagraph1ismarkedwithanavailability,disease,andotherratherthanbyWhenexperimentalpopulationsareupundersimplelaboratorythepredatoroftenexterminatesitsandthenbecomesextinctitself,nothinglefttoeat.However,ifsafelikethosepreyanimalshaveintheareprovided,thepreypopulationtolowlevelsbutnottoextinction.Lpreypopulationlevelstheninadequatefoodforthepredators,causingthepredatorpopulationTheymayyieldresultsthatdoaccuratelypredictchangesofpopulationsinthewild.Intheseenvironments,thepreyspeciesisbetteradaptedthanthepredatorspecies.Theseenvironmentsareappropriateonlyforstudyingsmallpopulationsofpredatorsandprey.decrease.Whenthisoccurs,thepopulationcanrebound.InthisthepredatorandpreypopulationscontinueinthiscyclicalpatternforpredatorsbecomeQ3Paragraph2implieswhichoftheQ2Theword“rebound”inthepassageclosestinmeaningQ1Inparagraph1,whydoesthediscussthemooseandwolvesonIsle[l3]正確答案：A。第一句說了experimentalenvironments后面立刻however。證明出現(xiàn)面的觀點(diǎn)。所A。B和原文主題沒關(guān)系，C雖然沒有明顯錯(cuò)誤，但沒生活中的情況。D原文也沒提到aboutexperimentalenvironmentsin[l2]:正確答案：B。原詞匯是反彈的意思。A是逃走，B是恢復(fù)，C是存活，D是反抗。這B最符合原分析。Bound本來就是跳躍的意思，加re前綴就是再次跳躍，也就是反彈批注[l:正確答案：。對(duì)應(yīng)文章的lte對(duì)其進(jìn)行了否定，對(duì)應(yīng)了B選項(xiàng)。A與原文沒有關(guān)系。C后一句話矛盾。D也不對(duì)D. predatorsarealsothepreyofParagraph2ismarkedwithanPopulationcyclesarecharacteristicsmallD. predatorsarealsothepreyofParagraph2ismarkedwithanPopulationcyclesarecharacteristicsmallmammals,andtheymammalsthatexperiencepopulationappeartobebroughtaboutTheirpopulationcyclesarenotaffectedpopulationshavefoundthattheTheirTheytypicallyundergoten-yearcycles.TheyhaveaccesetoplacessafefrompopulationsAmericansnowshoeharefollowsroughlyten-yearcycle.Itsnumberstenfoldtothirtyinatypicalcycle,andhundredfoldchangecanoccur.factorsappeartobegeneratingthecycle:foodplantsandpredators.Paragraph2and3arebothmarkedwithQ5Theword“roughly”inthepassageclosestinmeaningQ6Theword“generating”inthepassageclosestinmeaning speedingsmoothingharesThepreferredfoodsofsnowshoeThepreferredfoodforconsistsofwillowandbirchHighfiberfoodisthemostnutritiousforhares.Depletionofthesupplyarewillowandbirchtwigs.Asdensityincreases,thequantityofonlow-quality,high-fiberfood.birthrates,lowjuvenilesuvivorship,lowgrowthratesfollow,sothereisQ7Accordingtoparagraph4,allofthefollowingaretrueofthefoodofsnowshoe[l7]正確答案：B。排除題，選項(xiàng)A對(duì)應(yīng)第一句，正確。選項(xiàng)B對(duì)應(yīng)第二句，原文說high-fiberfeedlowquality，所以B錯(cuò)誤，選。C應(yīng)第三句，正確，不選。D對(duì)應(yīng)最后[l6正確答案：A。generate是導(dǎo)致，產(chǎn)生的意思。A是產(chǎn)生，B是改變，C是加速，D是漸出。根據(jù)意思選擇A。通過原文分析，前面說有兩個(gè)因素可以怎么樣這cycle，那略地。A是通常的，B是重復(fù)的，C是大約的，D是可觀察的。根據(jù)詞義選C。A錯(cuò)誤，對(duì)應(yīng)Cyrye對(duì)應(yīng)第二段第二句，dQ4Whichofthefollowingcanbefromparagraphs2and3aboutthewillowcorrespondingdeclineinabundance.OncetheharegrowthD.ThefoodsupplytakestwoorthreeyearstorecoverafterapeakinharepopulationParagraph4ismarkedwithanhasdeclined,ittakestwotothreeforthequantityoftwigstoAkeywillowcorrespondingdeclineinabundance.OncetheharegrowthD.ThefoodsupplytakestwoorthreeyearstorecoverafterapeakinharepopulationParagraph4ismarkedwithanhasdeclined,ittakestwotothreeforthequantityoftwigstoAkeypredatorofthesnowshoeharetheCanadalynx.TheCanadalynxaten-yearcycleofabundanceparallelstheabundancecycleofItcloselyfollowscycleofthesnowshoeWhenthenumbersoflynxfall,thenumbersofsnowshoeharessoondecrease.WhenhareAsharenumbersfall,sodonumbers,astheirfoodsupplynumbersItisnotclearlytothelynxParagraph5ismarkedwithanWhatcausesthepredator-oscillations?Doincreasingnumbersharesleadtooverharvestingofwhichinturnresultsinreducedpopulations,ordoincreasinglynxleadtooverharvestingofFieldexperimentscarriedoutbyChKrebsandcoworkersin1992provideplotsinCanada’sYukonterritorycontainedharepopulations.Whenwasaddedtotheseplots(nofoodandpredatorswerepredatoreffect)froman area,harenumbersincreasedA.Theeffectsofprovidingfoodwhilethesametimeintroducingandstayedthere—thecycleQ10Accordingtoparagraph6,whichofQ9Theword“conjunction”inthepassageclosestinmeaningabundancecycleoftheCanadaQ8Accordingtoparagraph5,whichoffollowingwastrueoftheharecycleinKrebs’s批注[l:正確答案：ers思。所以B，結(jié)合。符合原義。A是決定，C是交替，D是轉(zhuǎn)化。批注[l10]:正確答案：C。對(duì)應(yīng)位置同時(shí)都沒有的時(shí)候，就不存在cycle了。所以A說nocycle，那么條件中就多出了foodeffect，錯(cuò)誤不選。B選！Ccycle存在，可是兩因素都不存在。D跟兩個(gè)因素都沒關(guān)系選[l8]正確答案：A。原文說的是以選A。B的邏輯關(guān)系不對(duì)，并非野兔跟著山貓變化。C更不對(duì)，兩者數(shù)量是同時(shí)增減的。D也不符合原文cancelledeachother,sotherenoThecycleexistedwheneitherthefoodsupplywaslimitedortherewereTherewasacyclewhentherewerenopredatorsandfoodwassupplied.Ifthehareshadplacestohidecancelledeachother,sotherenoThecycleexistedwheneitherthefoodsupplywaslimitedortherewereTherewasacyclewhentherewerenopredatorsandfoodwassupplied.Ifthehareshadplacestohidelost.However,thecyclewasretainedeitherofthefactorswasallowedoperatealone:ifpredatorsexcludedbutfoodwasnotaddedeffectalone),oriffoodwasaddedinpresenceofpredators(predatoralone).Thus,bothfactorscanaffectcycle,which,inpractice,seemsto generatedbytheconjunctionoftheincreasedtenfoldandthenatthatParagraph6ismarkedwithanPredatorsareanessentialfactormaintainingcommunitiesthatareanddiverseinspecies.predators,thespeciesthatisthesites,andotherenvironmentaltendstodominateandexcludespecieswithwhichitcompetes.theeffectofseastarsontheecosysteminwhichtheyarepredatorsofbivalves?Bivalvepopulationsarekeptlow,allowingspeciesthatcompetewithbivalvestosurvive.Thenumbersofmostspeciesofbivalvesaregreatlyreduced,leavingthebivalvespeciesthatisthestrongestcompetitortodominateamongthesurvivors.phenomenonisknownasexclusion.”■However,ifthecontainsapredatorofthecompetitorspecies,thentheofthatcompetitoriseventhelesscompetitivespeciesabletosurvive.■Forexample,seapreyonavarietyofbivalvemolluskspreventthesebivalvesmonopolizinghabitatsontheseaThisopensupspaceformanyC. organisms.WhenseastarsaredecreasebecausemanyspeciesD.Seastarsdominateatfirstbutthendieoffbecauseofthedepletedfoodsupply.Paragraph7ismarkedwithanspeciesdiversityfallssharply.fromthestandpointofdiversity,itusuallyamistaketoeliminateapredatorfromaQ12Accordingtoparagraph7,whichoffollowingistrueofthephenomenonofcompetitorexclusion?批注[l12]:正確答案：D。根據(jù)competitorexclusion定位，這句話說thisphenomenon，那么對(duì)于現(xiàn)象描寫況，這個(gè)競(jìng)爭(zhēng)者還tendtodominate.符合D。A并不是這個(gè)現(xiàn)象的直接作的限制。B雖然正確，但沒指出其一性。C沒提到批注[l11]:正確答案：A。對(duì)應(yīng)了原B不對(duì)，雙殼動(dòng)物并不是dominate；C不對(duì)，bivalve控制后，diversity應(yīng)該是上升的。D也不對(duì)，海星并不死了啊Q11Accordingtoparagraph7,whichofItresultsinmoreItrequiresItresultsinmoreItrequiresthepresenceof Ithappensonlywhenthereisadominantcompetitor.Paragraph7ismarkedwithanAsaresult,therearenotenoughofthecompetitorstomonopolizetheenvironment’sWherewouldthesentencebestfit?ClickonsquaretoaddthesentencetotheQ14Directions:Anintroductorysentenceforbriefsummaryofthepassageisprovidedbelow.CompletethesummarybyselectingtheTHREEanswerchoicesthatexpressthemostimportantideasinthepassage.Somesentencesdonotbelonginthesummarybecausetheyexpressideasthatarenotpresentedinthepassageorareminorideasinthepassage.Thisquestionisworth2points.Dragyouranswerchoicestothespacestheybelong.Toremoveananswerchoice,clickonit.Toreviewthepassage,clickVI