托福TPO真题阅读每日解析Timberiline Vegetation on Mountains答案分析.docx
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托福TPO真题阅读每日解析Timberiline Vegetation on Mountains答案分析.docx
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托福TPO真题阅读每日解析TimberilineVegetationonMountains答案分析
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托福TPO真题阅读每日解析—TimberilineVegetationonMountains答案分析
摘要:
本文内容为欣宇老师精心分析的TPO阅读文章各项内容,包括文章逐句翻译、答案及题目解析、段意及难句分析和词汇汇总四部分内容。
全面、精细、深入地剖析具有生命的每一篇TPO文章
Key:
1.D2.A3.B4.C5.C6.B7.B8.A9.C10.D11.C12.D13.246
题目解析:
1.Theword“dramatic”inthepassageisclosestinmeaningto(VocabularyQuestion)
A.Gradual
B.Complex
C.Visible
D.Striking
相关原句:
Thetransitionfromforesttotreelesstundraonamountainslopeisoftenadramaticone.(Paragraph1)
本题解析:
dramatic意为“戏剧化的,惊人的”,与striking同义,因此选择D。
正确答案:
D
2.Whereisthelowertimberlinementionedinparagraph1likelytobefound?
(FactualInformationQuestion)
A.Inanareathathaslittlewater
B.Inanareathathaslittlesunlight
C.Aboveatransitionarea
D.Onamountainthathasonuppertimberline.
相关原句:
Inmanysemiaridareasthereisalsoalowertimberlinewheretheforestpassesintosteppeordesertatitsloweredge…(Paragraph1)
本题解析:
在本干旱地区树带界线1较低,即水分较少的地区会有较低的树带界线1,因此选择A。
正确答案:
A
3.Whichofthefollowingcanbeinferredfromparagraph1aboutboththeupperandlowertimberlines?
(InferenceQuestion)
A.Botharetreelesszones
B.Bothmarkforestboundaries.
C.Botharesurroundedbydesertareas.
D.Bothsufferformalackofmoisture.
相关原句:
Withinaverticaldistanceofjustafewtensofmeters,treesdisappearasalife-formandarereplacedbylowshrubs,herbs,andgrasses.Thisrapidzoneoftransitioniscalledtheuppertimberlineortreeline.(Paragraph1)
Inmanysemiaridareasthereisalsoalowertimberlinewheretheforestpassesintosteppeordesertatitsloweredge,usuallybecauseofalackofmoisture.(Paragraph1)
本题解析:
无论是uppertimberline还是lowertimberline,它们都是树木消失的界线1,因此选择B。
正确答案:
B
4.Paragraph2supportswhichofthefollowingstatementsaboutdeciduoustrees?
(FactualInformationQuestion)
A.Theycannotgrowincoldclimates.
B.Theydonotexistattheuppertimberline.
C.Theyarelesslikelythanevergreenstosurviveattheuppertimberline.
D.Theydonotrequireasmuchmoistureasevergreensdo.
相关原句:
Timberlinetreesarenormallyevergreens,suggestingthatthesehavesomeadvantageoverdeciduoustrees(thosethatlosetheirleaves)intheextremeenvironmentsoftheuppertimberline.(Paragraph2)
本题解析:
常青树比落叶树更能适应极线1的生存环境,更容易存活(havesomeadvantageoverdeciduoustrees(thosethatlosetheirleaves)intheextremeenvironments),因此选择C。
注意文中亦指出在喜马拉雅山部分地区的树带界线1处有落叶树,B错误。
正确答案:
C
5.Thewordattaininthepassageisclosestinmeaningto(VocabularyQuestion)
A.require
B.resist
C.achieve
D.endure
相关原句:
Thisisparticularlytruefortreesinthemiddleandupperlatitudes,whichtendtoattaingreaterheightsonridges…(Paragraph3)
本题解析:
attain意为“获得,得到”,此处指树木可以达到某一高度,即achieve,因此选择C。
正确答案:
C
6.Thewordtheyinthepassagerefersto(ReferenceQuestion)
A.valleys
B.trees
C.heights
D.ridges
相关原句:
Asthesnowisdeeperandlastslongerinthevalleys,treestendtoattaingreaterheightsontheridges,eventhoughtheyaremoreexposedtohigh-velocitywindsandpoor,thinsoilsthere.(Paragraph3)
本题解析:
即树木在山脊处长得更高,虽然在那里它们要经受更多考验,they指代trees,因此选择B。
正确答案:
B
7.Thewordproneinthepassageisclosestinmeaningto(VocabularyQuestion)
A.adapted
B.likely
C.difficult
D.resistant
相关原句:
Inthetropics,thevalleysappeartobemorefavorablebecausetheyarelesspronetodryout,theyhavelessfrost,andtheyhavedeepersoils.(Paragraph3)
本题解析:
prone意为“有…倾向”,即“容易变得…,很可能…(likely)”,因此选择B。
正确答案:
B
8.Accordingtoparagraph3,whichofthefollowingistrueoftreesinthemiddleandupperlatitudes?
(FactualInformationQuestion)
A.Treegrowthisnegativelyaffectedbythesnowcoverinvalleys.
B.Treegrowthisgreaterinvalleysthanonridges.
C.Treegrowthonridgesisnotaffectedbyhigh-velocitywinds.
D.Treegrowthlastslongerinthoselatitudesthanitdoesinthetropics.
相关原句:
Thisisbecausemiddle-andupper-latitudetimberlinesarestronglyinfluencedbythedurationanddepthofthesnowcover.Asthesnowisdeeperandlastslongerinthevalleys,treestendtoattaingreaterheightsontheridges,eventhoughtheyaremoreexposedtohigh-velocitywindsandpoor,thinsoilsthere.(Paragraph3)
本题解析:
文中指出中高纬度的树木之所以在山脊处长的更高是因为山谷处的积雪太深太久,对其生长不利,所以即使山脊环境有诸多不利(风大,土壤贫瘠等),树木还是在山脊长得更高。
因此选择A。
正确答案:
A
9.Whichofthesentencesbelowbestexpresstheessentialinformationinthehighlightedsentenceinthepassage?
(SentenceSimplificationQuestion)
A.Becauseoftheirdeformedshapesathighaltitudes,treesarenotlikelytobeseriouslyharmedbythestrongwindstypicalofthosealtitudes.
B.Asaltitudeincreases,thevelocityofwindsincrease,leadingtoaseriousdecreaseinthenumberoftreesfoundathighaltitudes.
C.Thedeformedshapesoftreesathighaltitudesshowthatwindvelocity,whichincreasewithaltitude,cancauseserioushardshipfortrees.
D.Increasedwindvelocityathighaltitudesdeformstheshapesoftrees,andthismaycauseseriousstressfortrees.
相关原句:
Windvelocityalsoincreaseswithaltitudeandmaycauseseriousstressfortrees,asismadeevidentbythedeformedshapesathighaltitudes.(Paragraph4,highlightedsentence)
本题解析:
风速随着海拔升高而提升,并可能给树造成严重的压力,正如高海拔地区树木变形已经证明了这一点。
也就是说树木变形说明了高速风对植物产生的严重压力(causeseriousstressfortrees),因此选择C。
注意,D错误之处在于并不是变形给树造成压力,而是高速风给树造成了压力,变形只是压力的表现。
正确答案:
C
10.Inparagraph4,whatistheauthor’smainpurposeinthediscussionofthedramaticcessationoftreegrowthattheuppertimberline?
(RhetoricalPurposeQuestion)
A.Toarguethatnoneofseveralenvironmentfactorsthatarebelievedtocontributetothatphenomenondoinfactplayaroleincausingit.
B.Toargueinsupportofoneparticularexplanationofthatphenomenonagainstseveralcompetingexplanations.
C.Toexplainwhytheprimaryenvironmentalfactorresponsibleforthatphenomenonhasnotyetbeenidentified.
D.Topresentseveralenvironmentalfactorsthatmaycontributetoasatisfactoryexplanationofthatphenomenon.
相关原句:
Thereisstillnouniversallyagreed-onexplanationforwhythereshouldbesuchadramaticcessationoftreegrowthattheuppertimberline.Variousenvironmentalfactorsmayplayarole.(Paragraph4)
本题解析:
作者提到树带界线1处树木的消失很惊人,是为下文讲述出现这一现象的原因(environmentalfactors)做铺垫,因此选择D。
正确答案:
D
11.Accordingtoparagraph6,allofthefollowingstatementsaretrueofplantsinthealpinezoneEXCEPT:
(NegativeFactualInformationQuestion)
A.Becausetheyarelow,theyarelessexposedtostrongwinds.
B.Becausetheyarelow,thewintersnowcovergivesthemmoreprotectionfromtheextremecold.
C.Intheequatorialmountains,theytendtobelowerthaninmountainselsewhere.
D.Theirlowgrowthformkeepsthemclosertotheground,wherethereismoreheatthanfurtherup.
相关原句:
Thisenablesthemtoavoidtheworstrigorsofhighwindsandpermitsthemtomakeuseofthehighertemperaturesimmediatelyadjacenttothegroundsurface.(Paragraph6)
Thelowgrowthformcanalsopermittheplantstotakeadvantageoftheinsulationprovidedbyawintersnowcover.(Paragraph6)
Intheequatorialmountainsthelowgrowthformislessprevalent.(Paragraph6)
本题解析:
文章指出在热带地区的山上(equatorialmountains),低矮生长形态便不多见了(lessprevalent),C选项却称在热带地区植物更低矮,错误,因此选择C。
ABD选项内容文中都有提及。
正确答案:
C
12.Lookatthefoursquares[█]thatindicatewherethefollowingsentencecouldbeaddedtothepassage.
(InsertTextQuestion)
Thisexplainshow,forexample,alpinecushionplantshavebeenfoundgrowingatanaltitudeof6,180meters.
Wherewouldthesentencebestfit?
Clickonasquaretoaddthesentencetothepassage.
Abovethetreelinethereisazonethatisgenerallycalledalpinetundra.█(A)Immediatelyadjacenttothetimberline,thetundraconsistsofafairlycompletecoveroflow-lyingshrubs,herbs,andgrasses,whilehigherupthenumberanddiversityofspeciesdecreaseuntilthereismuchbaregroundwithoccasionalmossesandlichensandsomeprostratecushionplants.█(B)Someplantscanevensurviveinfavorablemicrohabitatsabovethesnowline.Thehighestplantsintheworldoccurataround6,100metersonMakaluintheHimalayas.█(C)Atthisgreatheight,rocks,warmedbythesun,meltsmallsnowdrifts.█(D)Thisexplainshow,forexample,alpinecushionplantshavebeenfoundgrowingatanaltitudeof6,180meters.
本题解析:
插入句中“thisexplains”和“6180meters”与前句中“around6100meters”和“rocks,warmedbythesun,meltsmallsnowdrifts(植物能存活的原因)”相呼应,插入句作为例子(forexample)进一步说明了为何在高纬度植物能够存活。
因此选择D。
正确答案:
D
13.Directions:
Anintroductorysentenceforabriefsummaryofthepassageisprovidedbelow.CompletethesummarybyselectingtheTHREEanswerchoicesthatexpressthemostimportantideasinthepassage.Somesentencesdonotbelonginthesummarybecausetheyexpressideasthatarenotpresentedinthepassageorareminorideasinthepassage.Thisquestionisworth2points.
(ProseSummaryQuestion)
Atthetimberline,whetherupperorlower,thereisaprofoundchangeinthegrowthoftreesandotherplants.
●
●
●
Answerchoices
1.Birchisoneofthefewspeciesoftreethatcansurviveintheextremeenvironmentsoftheuppertimberline.
2.Thereisnoagreementamongscientistsastoexactlywhyplantgrowthissharplydifferentaboveandbelowtheu
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