房山区高考英语阅读理解专题选练8及答案暑假.docx

房山区高考英语阅读理解专题选练8及答案暑假.docx

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房山区高考英语阅读理解专题选练8及答案暑假

阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。

Inarecentannouncement,HarvardandtheMassachusettsInstituteofTechnology（MIT）saidthattheyhavejoinedforcestoofferfreeonlinecoursesinanefforttoattractmillionsofonlinelearnersworldwide.

Beginningthisfall,anumberofcoursesdevelopedbyteachersatbothuniversitieswillbeofferedonlinethroughanew$60millionprogram,knownasedX.“AnyonewithanInternetconnectionanywhereintheworldcanuseouronlinecourses,”HarvardPresidentDrewFaustsaidduringameetingtoannouncetheplan.

MIThasofferedaprogramcalledOpenCourseWarefortenyearsthatmakesmaterialsfrommorethan2,000classesfreeonline.Ithasbeenusedbymorethan100millionpeople.InDecember,theschoolannounceditalsowouldbeginofferingaspecialcertificate,knownasMITx,forpeoplewhocompletecertainonlinecourses.Harvardhaslongofferedcoursestoawiderpopulationthroughasimilarprogram.

TheMITxwillserveasthefoundationforthenewlearningplatform.

MITPresidentSusanHockfieldsaidmorethan120,000peoplesignedupforthefirstMITxcourse.ShesaidHarvardandMIThopeotheruniversitieswilljointheminofferingcoursesontheopen-sourceedXplatform.

“Fastenyourseatbelts,”Hockfieldsaid.

Otheruniversities,includingStanford,YaleandCarnegie-Mellon,havebeenexperimentingwithteachingtoaglobalpopulationonline.

TheHarvard-MITprogramwillbemonitoredbyanot-for-profit（非盈利的）organizationbasedinCambridge,tobeownedequallybythetwouniversities.BothMITandHarvardhaveprovided$30milliontostarttheprogram.TheyalsoplantousetheedXplatformtoresearchhowstudentslearnandwhichteachingmethodsandtoolsaremostsuccessful.

1.Accordingtothistext,edXis　　　.　

A.apartofthefreeMITOpenCourseWare

B.afreecomputerprogrambyMITandHarvard

C.aHarvard-MITplatformoffreeonlinecourses

D.afreeprogramonlineforuniversitiesworldwide

2.Whatissaidaboutonlineeducationinthetext?

A.Universitieshavebeentryingonlinecourses.

B.About2,000onlinecourseshavebeenoffered.

C.Over100millionpeoplehavefinishedcoursesonline.

D.StanfordandYaletogetherhavecoursessimilartoedX.

3.Theunderlinedpartinthetextprobablymeans“　　　”.　

A.Getreadyforthedifficulties

B.Getreadyforthiseducationalchange

C.Getpreparedtocompletetheonlinecourses

D.GetpreparedtomakematerialsfortheedXcourses

4.WhatcanbesaidaboutMITxaccordingtothetext?

A.ItisfirstofferedaspartoftheedXlearningprogram.

B.ItisanotherfreeMIT-Harvardonlinelearningprogram.

C.Itisastandardtorecognizeonlinelearners’achievement.

D.ItisanewkindoffreeonlinecourseofHarvardandMIT.

【参考答案】　1—4、CABC　　

PassageThirteen（CrypticColoring）

  Crypticcoloringisbyfarthecommonestuseofcolorinthestruggleforexistence.Itisemployedforthepurposeofattack（aggressiveresemblanceoranticrypticcoloring）aswellasofdefense（protectiveresemblanceorprocrypticcoloring）.Thefactthatthesamemethodconcealment,maybeusedbothforattackanddefensehasbeenwellexplainedbyT.Beltwhosuggestsasanillustrationtherapidityofmovementwhichisalsomadeuseofbybothpursuerandpursued,whichissimilarlyraisedtoamaximuminbothbythegradualdyingoutoftheslowestthroughaseriesofgenerations.Crypticcoloringiscommonlyassociatedwithotheraidsinthestruggleforlife.Thuswell-concealedmammalsandbirds,whendiscovered,willgenerallyendeavortoescapebyspeedandwilloftenattempttodefendthemselvesactively.Ontheotherhand,smallanimalswhichhavenomeansofactivedefense,suchaslarge,numbersofinsects,frequentlydependuponconcealmentalone.Protectiveresemblanceisfarcommoneramonganimalsthanaggressiveresemblance,incorrespondencewiththefactthatpredaceousformsareasarulemuchlargerandmuchlessnumerousthantheirprey.InthecaseofinsectivorousVertebrataandtheirpreysuchdifferencesexistinanexaggeratedform.Crypticcoloring,whetherusedfordefenseofattack,maybeeithergeneralorspecial.Ingeneralresemblancetheanimal,inconsequenceofitscoloring,producesthesameeffectasitsenvironment,buttheconditionsdonotrequireanyspecialadaptationofshapeandoutline.Generalresemblanceisespeciallycommonamongtheanimalinhabitingsomeuniformlycoloredexpanseoftheearth’ssurface,suchasanoceanoradesert.Intheformer,animalsofallshapesarefrequentlyprotectedbytheirtransparentbluecolor,onthelatter,equallydiverseformsaredefendedbytheirsandyappearance.Theeffectofauniformappearancemaybeproducedbyacombinationoftintsinstartlingcontrast.Thustheblackandwhitestripesofthezebrablendtogetheratalittledistance,and“theirproportionissuchasexactlytomatchthepaletintwhicharidgroundpossesseswhenseenbymoonlight.”Specialresemblanceisfarcommonerthangeneralandistheformwhichisusuallymetwithonthediversifiedsurfaceoftheearth,ontheshores,andinshallowwater,aswellasonthefloatingmassesofalgaeonthesurfaceoftheocean,suchastheSargassoSea.Intheseenvironmentsthecrypticcoloringofanimalsisusuallyaidedbyspecialmodificationsofshape,andbytheinstinctwhichleadsthemtoassumeparticularattitudes.Completestillnessandtheassumptionofacertainattitudeplayanessentialpartingeneralresemblanceonland;butinspecialresemblancetheattitudeisoftenhighlyspecialized,andperhapsmoreimportantthananyotherelementinthecomplexmethodbywhichconcealmentiseffected.Inspecialresemblancethecombinationofcoloring,shape,andattitudeissuchastoproduceamoreorlessexactresemblancetosomeoneoftheobjectsintheenvironment,suchasaleafoftwig,apatchoflichen,aflakeofbark.Inallcasestheresemblanceistosomeobjectwhichisofnointeresttotheenemyorpreyrespectively.Theanimalisnothiddenfromviewbybecomingindistinguishablefromitsbackgroundasinthecaseofgeneralresemblance,butitismistakenforsomewell-knowobject.

Inseekingtheinterpretationofthesemostinterestingandelaborateadaptations,attemptshavebeenmadealongtwolines.Thefirstseekstoexplaintheeffectasaresultofthedirectinfluenceoftheenvironmentupontheindividual（G.L.L.Buffon）,orbytheinheritedeffectsofeffortsandtheuseanddisuseofparts（J.B.P.Lamarck）.Thesecondbelievesthatnaturalselectionproducedtheresultandafterwardsmaintaineditbythesurvivalofthebestconcealedineachgeneration.Theformersuggestionbreaksdownwhenthecomplexnatureofnumerousspecialresemblancesisappreciated.Thusthearrangementofcolorsofmanykindsintoanappropriatepatternrequiresthecooperationofasuitableshapeandtherigidlyexactadoptionofacertainelaborateattitude.Thelatterisinstinctiveandthusdependsonthecentralnervoussystem.Thecrypticeffectisduetotheexactcooperationofallthesefactors;andinthepresentstateofscience,theonlypossibleholeofaninterpretationliesinthetheoryofnaturalselection,whichcanaccumulateanyandeveryvariationwhichtendstowardsurvival.Afewofthechieftypesofmethodsbywhichconcealmentiseffectedmaybebrieflydescribed.Thecolorsoflargenumbersofvertebrateanimalsaredarkestonthebackandbecomegraduallylighteronthesides,passingintowhiteonthebelly.AbbotH.Thayerhassuggestedthatthisgradationobliteratestheappearanceofsolidity,whichisduetoshadow.Thecolorharmony,whichisalsoessentialtoconcealment,isproducedbecausethebackisofthesametintastheenvironment（e.g.earth）,bathedinthecoldblue-whiteofthesky,whilethebelly,beingcoldblue-whiteandbathedinshadowandyellowearthreflectionsproducesthesameeffects.ThismethodofneutralizingshadowforthepurposeofconcealmentbyincreasedlightnessoftintwasfirstsuggestedbyE.B.Poultoninthecaseofalarvaandapupa,buthedidnotappreciatethegreatimportanceoftheprinciple.Inananalogousmethodananimalinfrontofabackgroundofdarkshadowmayhavepartofitsbodyobliteratedbytheexistenceofadarktint,theremainderresembling,e.g.,apartofaleaf.Thismethodofrenderinginvisibleanypartwhichwouldinterferewiththeresemblanceiswellknowinmimicry.

1.   Theblackandwhitestripesofthezebraaremostusefulform

[A].hunters.               .nocturnalpredators

[C].lionsandtigers.           [C].insectivorous Vertrbrata

2.   Aggressiveresemblanceoccurswhen

[A].apredaceousattitudeisassumed.

.specialresemblanceisutilized.

[C].ananimalreliesonspeed.

[D].ananimalblendsinwithitsbackground.

3.   Specialresemblancediffersfromgeneralresemblanceinthattheanimalrelieson

[A].itsabilitytofrightenitsadversary.    .speed.

[C].itsabilitytoassumeanattitude.     [D].mistakenidentify

4.   Thetitlebelowthatbestexpressestheidesofthispassageis

[A].CrypticcolorationforProtection.     .HowAnimalsSurvive.

[C].TheusesofMimicryinNature.      [D].ResemblancesofAnimals.

5.   Ofthefollowingwhichistheleastcommon?

[A].protectiveresemblance.          .Generalresemblance.

[C].Aggressiveresemblance.          [D].Specialresemblance.

Vocabulary

1. cryptic            隐藏的，保护的

      crypticcoloring  保护色，隐藏色

2. predaceous          食肉的，捕食其他动物的。

3. vertebrate          脊椎动物门

4. tint              色泽，色彩

5. zebra            斑马

6. Sargass