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下面的短文后列出7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 ? ? ...
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{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题{{B}}第一篇{{/B}} {{B}}??????? ?????EatHealthy{{/B}}??Cleanyour plate!andBeamemberoftheclean-plateclub!Justabouteverykidinthe UShasheardthisfromaparentorgrandparent.Oftenit’saccompaniedbyan appeal:JustthinkaboutthosestarvingorphansinAfrica!Sureweshouldbe gratefulforeverybiteoffood.UnfortunatelymanypeopleintheUStaketoo manybites.Insteadofstayingcleantheplateperhapsweshouldsavesome foodfortomorrow.??AccordingtonewsreportsUSrestaurantsare partlytoblameforthegrowingbellies.Awaiterputsaplateoffoodinfront ofeachcustomerwithtwotofourtimestheamountrecommendedbythe governmentaccordingtoaUSATodaystory.Americanstraditionallyassociate quantitywithvalueandmostrestaurantstrytogivethemthat.Theypreferto havecustomerscomplainabouttoomuchfoodratherthantoolittle.? ?BarbaraRollsanutritionprofessoratPennsylvaniaStateUniversity toldUSATodaythatrestaurantportionsizesbegantogrowinthe1970sthe sametimethattheAmericanwaistlinebegantoexpand.??Health expertshavetriedtogetmanyrestaurantstoservesmallerportions.Now apparentlysomecustomersarecallingforthistoo.Therestaurantindustry trademagazineQSRreportedlastmonththat57percentofmorethan4000 peoplesurveyedbelieverestaurantsserveportionsthataretoolarge;23 percenthadnoopinion;20percentdisagreed.Butacloserlookatthesurvey indicatesthatmanyAmericanswhocan’taffordfinediningstillprefer large-portions.70percentofthoseearningatleast$150000peryearprefer smallerportions;butonly45percentofthoseearninglessthan$25000want smaller.??It’snotthatworkingclassAmericansdon’twanttoeat healthy.It’sjustthatafterlonghoursatlow-payingjobsgettinglesson theirplatehardlyseemslikeagooddeal.Theylivefrompaychecktopaycheck happytosavealittlemoneyfornextyear’sChristmas presents.Whathappenedinthe1970s?______.
RegenerationofLimbs Mostpeoplewouldagreethatitwouldbewonderfulifhumanscouldregeneratelimbs.Thosewhohavelosttheirarmsorlegswouldbecompleteagain.Thedayisstillfaroffwhenthismighthappen.Butinthelast10yearsdoctorshavereportedregenerationinsmallerpartsofthebodymostoftenfingers. Regenerationisnotanewly-discoveredprocess.Forcenturiesscientistshaveseenitworkinsomekindsofanimals.Breakoffalizards蜥蜴的tailforexampleanditwillgrowanewtail.Scientistsnowarelookingforawaytoturnonthisexcitingabilityinmorehighly-developedanimalsincludinghumans.Theirexperimentsshowthatnervescellchemistryandthenaturalelectriccurrentsinthebodyallseemtohaveapartinthisprocess. Thebodyofeveryanimalcontainsgeneralpurposecellsthatchangeintowhateverkindofcellsthebodyneeds.Animalssuchasthelizardorsalamander蝾螈usethesecellstoregenerateanewtailorlegwhentheoldoneisbrokenoff.Thesecellscollectaroundthewound.Theyformamasscalledablastema胚基.Thecellsoftheblastemabegintochange.Somebecomebonecellssomemusclecellssomeskincells.Slowlyanewpartre-growsfromthebodyoutward.Whencompletedthenewpartisjustliketheoldone. Morethan200yearsagoItalianscientistLuigiSpallanzanishowedthatyoungeranimalshaveagreaterabilitytoregeneratelostpartsthanolderanimals.Sodoanimalslowerontheladderofevolutionarydevelopment.Themajordifferenceseemstobethatless-developedanimalshavemorenervesintheirtailsandlegsthanhumansdointheirarmsandlegs. Anotherhelpfulpieceofinformationwasdiscoveredinthelate1800s.Scientistsfoundthatwhenacreatureisinjuredanelectricalcurrentflowsaroundthewound.Thestrengthofthecurrentdependsonhowseverethewoundisandonhowmuchnervetissueispresent. In1945AmericanscientistMerylRosetestedanotherideaaboutregeneration.Hethoughtanewlimbmightgrowonlyfromanopenwound.DoctorRosecutoffthefrontlegsofsomefrogsbelowtheknee.Hekeptthewoundswetwithastrongsaltyliquid.Thispreventedskinfromgrowingoverthewounds.Theresultsweresurprising.Frogsdonotregeneratenewlegsnaturally.Butthesefrogsbegantogrownewlimbs.Abouthalfofeachcut-offleggrewbackagain.Newbonesandmusclesdeveloped. Thisresearchhasleddoctorstonewwaysoftreatingcut-offfingers.Doctorshaveobservedforexamplethatmanychildrenandsomeadultswillre-growthetopofafingerifthewoundisleftopen. Regenerationofapartofthebodyisimpossiblewithout______.
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 {{B}}?????????? ???TradeUnions{{/B}}??1．Somescholarshave associatedtradeunionswiththemedievalcraftguilds中世纪的行会butthereare importantdifferencesbetweenthetwo.Theguildmembersweremastercraftsmen whoownedcapitalandoftenemployedworkers.?Unionsareknownas associationsofworkerswithsimilarskills.??2．Inthepast individualworkershadnocontrolovertheconditionsoftheirworkinglives; politicalandeconomicpowerwasconcentratedinthehandsofwealthybusiness owners.Workersfoundhoweverthattherewasstrengthinuniting.Fromtheir earliestyearsunionobjectiveshavebeenhigherwagesandimprovedworking conditions.??3．Employersresistedofcourse.Theymadegreat effortstostopunionorganizingitsactivities.?Unionmemberswerefired workerswereforcedtosigncontractsinwhichtheypromised?nottojoina unionandcompanieshiredstrikebreakers破坏罢工者andevengunmentofrighten organizers.??4．Oneoftheearliestsuccessfullabororganizations intheUnitedStateswastheKnightsofLaborfoundedin1869.TheKnights whichincludedbothskilledandunskilledworkersattemptedtoorganizeall workersintoonegreatunion.AfteritsuccessfullystrucktheWabashrailroad ownedbyJayGouldin1885itspopularityandpowergrewdramatically.In1886 theKnightshad700000members.??5．ThedeclineoftheKnightsof Laborhowevercamequickly.ThestrikeagainstGouldwasgraduallybrokenand theKnights’radicalpositionsonsocialissuescostthempublicsupport. ?Intheendalackofunityaswellastherapidinflowofunskilled immigrantsweakenedtheunion’seconomicpowerandtheorganizationcametoan end.Employerswouldtrytheirbestto______
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
RegenerationofLimbs Mostpeoplewouldagreethatitwouldbewonderfulifhumanscouldregeneratelimbs.Thosewhohavelosttheirarmsorlegswouldbecompleteagain.Thedayisstillfaroffwhenthismighthappen.Butinthelast10yearsdoctorshavereportedregenerationinsmallerpartsofthebodymostoftenfingers. Regenerationisnotanewly-discoveredprocess.Forcenturiesscientistshaveseenitworkinsomekindsofanimals.Breakoffalizards蜥蜴的tailforexampleanditwillgrowanewtail.Scientistsnowarelookingforawaytoturnonthisexcitingabilityinmorehighly-developedanimalsincludinghumans.Theirexperimentsshowthatnervescellchemistryandthenaturalelectriccurrentsinthebodyallseemtohaveapartinthisprocess. Thebodyofeveryanimalcontainsgeneralpurposecellsthatchangeintowhateverkindofcellsthebodyneeds.Animalssuchasthelizardorsalamander蝾螈usethesecellstoregenerateanewtailorlegwhentheoldoneisbrokenoff.Thesecellscollectaroundthewound.Theyformamasscalledablastema胚基.Thecellsoftheblastemabegintochange.Somebecomebonecellssomemusclecellssomeskincells.Slowlyanewpartre-growsfromthebodyoutward.Whencompletedthenewpartisjustliketheoldone. Morethan200yearsagoItalianscientistLuigiSpallanzanishowedthatyoungeranimalshaveagreaterabilitytoregeneratelostpartsthanolderanimals.Sodoanimalslowerontheladderofevolutionarydevelopment.Themajordifferenceseemstobethatless-developedanimalshavemorenervesintheirtailsandlegsthanhumansdointheirarmsandlegs. Anotherhelpfulpieceofinformationwasdiscoveredinthelate1800s.Scientistsfoundthatwhenacreatureisinjuredanelectricalcurrentflowsaroundthewound.Thestrengthofthecurrentdependsonhowseverethewoundisandonhowmuchnervetissueispresent. In1945AmericanscientistMerylRosetestedanotherideaaboutregeneration.Hethoughtanewlimbmightgrowonlyfromanopenwound.DoctorRosecutoffthefrontlegsofsomefrogsbelowtheknee.Hekeptthewoundswetwithastrongsaltyliquid.Thispreventedskinfromgrowingoverthewounds.Theresultsweresurprising.Frogsdonotregeneratenewlegsnaturally.Butthesefrogsbegantogrownewlimbs.Abouthalfofeachcut-offleggrewbackagain.Newbonesandmusclesdeveloped. Thisresearchhasleddoctorstonewwaysoftreatingcut-offfingers.Doctorshaveobservedforexamplethatmanychildrenandsomeadultswillre-growthetopofafingerifthewoundisleftopen. Thepassageindicatesthat______.
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 {{B}}?????????? ???TradeUnions{{/B}}??1．Somescholarshave associatedtradeunionswiththemedievalcraftguilds中世纪的行会butthereare importantdifferencesbetweenthetwo.Theguildmembersweremastercraftsmen whoownedcapitalandoftenemployedworkers.?Unionsareknownas associationsofworkerswithsimilarskills.??2．Inthepast individualworkershadnocontrolovertheconditionsoftheirworkinglives; politicalandeconomicpowerwasconcentratedinthehandsofwealthybusiness owners.Workersfoundhoweverthattherewasstrengthinuniting.Fromtheir earliestyearsunionobjectiveshavebeenhigherwagesandimprovedworking conditions.??3．Employersresistedofcourse.Theymadegreat effortstostopunionorganizingitsactivities.?Unionmemberswerefired workerswereforcedtosigncontractsinwhichtheypromised?nottojoina unionandcompanieshiredstrikebreakers破坏罢工者andevengunmentofrighten organizers.??4．Oneoftheearliestsuccessfullabororganizations intheUnitedStateswastheKnightsofLaborfoundedin1869.TheKnights whichincludedbothskilledandunskilledworkersattemptedtoorganizeall workersintoonegreatunion.AfteritsuccessfullystrucktheWabashrailroad ownedbyJayGouldin1885itspopularityandpowergrewdramatically.In1886 theKnightshad700000members.??5．ThedeclineoftheKnightsof Laborhowevercamequickly.ThestrikeagainstGouldwasgraduallybrokenand theKnights’radicalpositionsonsocialissuescostthempublicsupport. ?Intheendalackofunityaswellastherapidinflowofunskilled immigrantsweakenedtheunion’seconomicpowerandtheorganizationcametoan end.Paragraph4______
{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断 {{B}}??????? ??????ChangesinMuseums{{/B}}? ?Museumshavechanged.?Theyarenolongerplacesthatoneshould visittheyareplacestoenjoyandlearn.??Atasciencemuseum inOntarioCanadayoucanfeelyourhairstandonendasharmlesselectricity passesthroughyourbody.AttheMetropolitan大城市的MuseumofArtinNewYork Cityyoucanlookattheseventeenthcenturyinstrumentswhilelisteningto theirmusic.AtNewYork’sAmericanMuseumofNaturalHistoryrecentlyyoucan helpmakeabone-by-bonereproductionofthemuseum’sdinosaur恐龙abeast thatlived200millionyearsago.??Moreandmoremuseumdirectors arerealizingthatpeoplelearnbestwhentheycansomehowbecomepartofwhat theyareseeing.Inmanysciencemuseumsforexampletherearenoguided tours.Thevisitorisencouragedtotouchlistenoperateandexperimentsoas todiscoverscientificprinciplesforhimself.Thepurposeisnotonlyto providefunbutalsotohelppeoplefeelathomeintheworldofscience.The theoryisthatpeoplewhodonotunderstandsciencewillprobablyfearitand thosewhofearsciencewillnotuseittobestadvantage.??One causeofallthesechangesistheincreaseinwealthandleisuretime.Another causeistherisingpercentageofyoungpeopleinthepopulation.Manyofthese youngpeoplearecollegestudentsorcollegegraduates.LeonF.Twiggsayoung blackprofessorofartoncesaidTheyseethingsinanewanddifferentway. Theyarenotsatisfiedtostandandlookatworksofart;theywantarttheycan participate参加in.Thesameistrueofscienceand history.NewYork’sAmericanMuseumofNaturalHistoryisopenedrecently.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
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{{*HTML*}}{{B}}第二篇{{/B}} {{B}}??????? ?????TheDeer’sDeath{{/B}}??Heran closeandagainstoodstillstoppedbyanewfear.Aroundhimthegrasswas whisperingandalive.Helookedwildlyaboutthendown.Thegroundwasblack withantsgreatenergeticantsthattooknonoticeofhimbuthurriedtowards thefightingshape.Andashedrewinhisbreathandpityandterrorseizedhim thebeastfellandthescreamingstopped.Nowhecouldhearnothingbutabird singingandthesoundoftherustling沙沙声whisperingants.??He peeredoverattheblacknessthattwitchedwiththejerking抽搐nerves.Itgrew quieter.?Thereweresmalltwitchesfromthemassthatstilllookedvaguely liketheshapeofasmallanimal.??Itcameintohismindthathe couldshootitandenditspain;andheraisedthegun.Thenheloweredit again.Thedeercouldnolongerfeel;itsfightingwasamechanicalprotestof thenerves.Butitwasnotthatwhichmadehimputdownthegun.Itwasa swellingfeelingofrageandmiseryandprotestthatexpresseditselfinthe thought:ifIhadnotcomeitwouldhavediedlikethissowhyshouldI interfere?Alloverthebushthingslikethishappen;theyhappenallthetime; thisishowlifegoesonbylivingthingsdyingpainfully.Icannotstopit.He wasgladthatthedeerwasunconsciousandhadgonepastsufferingsothathe didnothavetomakeadecisiontokillit.Athisfeetnowwereantstricking backwithpinkfragmentsintheirmouthsandtherewasafreshacidsmellinhis nose.Hesternlycontrolledtheuselesslyconvulsing痉挛的musclesofhisempty stomachandremindedhimself:theantsmusteattoo.??Theshape hadgrownsmall.Nowitlookedlikenothingtoberecognized.Hesawthe blacknessthinandbitsofwhiteshowedthroughshininginthesun—yesthere wasthesunjustup.Thentheboylookedatthoseinsects.Afewwerestanding andgazingupathimwithsmallglitteringeyes.Goaway!hesaidtotheants coldly.Iamnotforyou—notjustyetatanyrate.??Hebent overthebonesandtouchedthesockets孔intheskull:thatwaswheretheeyes werehethoughtsuspiciouslyrememberingtheliquideyesofadeer.? ?Thatmorningperhapsanhouragothissmallcreaturehadbeenstepping proudandfreethroughthebushevenashehimselfhaddone.Proudlystepping theearthithadsmeltthecoldmorningair.?Walkinglikekingsithad movedfreelythroughthisbushwhereeachbladeofgrassgrewforitaloneand wheretheriverranpuresparklingwaterforittodrink.??And then—whathadhappened?Suchasureswiftfootedthingcouldsurelynotbe trappedbyaswarmofants?Theboydidnotshootthedeerbecause______.
Peteris{{U}}experiencing{{/U}}adifficultperiodinhislife.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 {{B}}?????????? ???TradeUnions{{/B}}??1．Somescholarshave associatedtradeunionswiththemedievalcraftguilds中世纪的行会butthereare importantdifferencesbetweenthetwo.Theguildmembersweremastercraftsmen whoownedcapitalandoftenemployedworkers.?Unionsareknownas associationsofworkerswithsimilarskills.??2．Inthepast individualworkershadnocontrolovertheconditionsoftheirworkinglives; politicalandeconomicpowerwasconcentratedinthehandsofwealthybusiness owners.Workersfoundhoweverthattherewasstrengthinuniting.Fromtheir earliestyearsunionobjectiveshavebeenhigherwagesandimprovedworking conditions.??3．Employersresistedofcourse.Theymadegreat effortstostopunionorganizingitsactivities.?Unionmemberswerefired workerswereforcedtosigncontractsinwhichtheypromised?nottojoina unionandcompanieshiredstrikebreakers破坏罢工者andevengunmentofrighten organizers.??4．Oneoftheearliestsuccessfullabororganizations intheUnitedStateswastheKnightsofLaborfoundedin1869.TheKnights whichincludedbothskilledandunskilledworkersattemptedtoorganizeall workersintoonegreatunion.AfteritsuccessfullystrucktheWabashrailroad ownedbyJayGouldin1885itspopularityandpowergrewdramatically.In1886 theKnightshad700000members.??5．ThedeclineoftheKnightsof Laborhowevercamequickly.ThestrikeagainstGouldwasgraduallybrokenand theKnights’radicalpositionsonsocialissuescostthempublicsupport. ?Intheendalackofunityaswellastherapidinflowofunskilled immigrantsweakenedtheunion’seconomicpowerandtheorganizationcametoan end.Guildershadthemoneyto______
Icanhardlybelieveitit's{{U}}amazing{{/U}}.
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 {{B}}?????????? ???TradeUnions{{/B}}??1．Somescholarshave associatedtradeunionswiththemedievalcraftguilds中世纪的行会butthereare importantdifferencesbetweenthetwo.Theguildmembersweremastercraftsmen whoownedcapitalandoftenemployedworkers.?Unionsareknownas associationsofworkerswithsimilarskills.??2．Inthepast individualworkershadnocontrolovertheconditionsoftheirworkinglives; politicalandeconomicpowerwasconcentratedinthehandsofwealthybusiness owners.Workersfoundhoweverthattherewasstrengthinuniting.Fromtheir earliestyearsunionobjectiveshavebeenhigherwagesandimprovedworking conditions.??3．Employersresistedofcourse.Theymadegreat effortstostopunionorganizingitsactivities.?Unionmemberswerefired workerswereforcedtosigncontractsinwhichtheypromised?nottojoina unionandcompanieshiredstrikebreakers破坏罢工者andevengunmentofrighten organizers.??4．Oneoftheearliestsuccessfullabororganizations intheUnitedStateswastheKnightsofLaborfoundedin1869.TheKnights whichincludedbothskilledandunskilledworkersattemptedtoorganizeall workersintoonegreatunion.AfteritsuccessfullystrucktheWabashrailroad ownedbyJayGouldin1885itspopularityandpowergrewdramatically.In1886 theKnightshad700000members.??5．ThedeclineoftheKnightsof Laborhowevercamequickly.ThestrikeagainstGouldwasgraduallybrokenand theKnights’radicalpositionsonsocialissuescostthempublicsupport. ?Intheendalackofunityaswellastherapidinflowofunskilled immigrantsweakenedtheunion’seconomicpowerandtheorganizationcametoan end.Paragraph2______
{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断 {{B}}??????? ??????ChangesinMuseums{{/B}}? ?Museumshavechanged.?Theyarenolongerplacesthatoneshould visittheyareplacestoenjoyandlearn.??Atasciencemuseum inOntarioCanadayoucanfeelyourhairstandonendasharmlesselectricity passesthroughyourbody.AttheMetropolitan大城市的MuseumofArtinNewYork Cityyoucanlookattheseventeenthcenturyinstrumentswhilelisteningto theirmusic.AtNewYork’sAmericanMuseumofNaturalHistoryrecentlyyoucan helpmakeabone-by-bonereproductionofthemuseum’sdinosaur恐龙abeast thatlived200millionyearsago.??Moreandmoremuseumdirectors arerealizingthatpeoplelearnbestwhentheycansomehowbecomepartofwhat theyareseeing.Inmanysciencemuseumsforexampletherearenoguided tours.Thevisitorisencouragedtotouchlistenoperateandexperimentsoas todiscoverscientificprinciplesforhimself.Thepurposeisnotonlyto providefunbutalsotohelppeoplefeelathomeintheworldofscience.The theoryisthatpeoplewhodonotunderstandsciencewillprobablyfearitand thosewhofearsciencewillnotuseittobestadvantage.??One causeofallthesechangesistheincreaseinwealthandleisuretime.Another causeistherisingpercentageofyoungpeopleinthepopulation.Manyofthese youngpeoplearecollegestudentsorcollegegraduates.LeonF.Twiggsayoung blackprofessorofartoncesaidTheyseethingsinanewanddifferentway. Theyarenotsatisfiedtostandandlookatworksofart;theywantarttheycan participate参加in.Thesameistrueofscienceand history.Peoplecanaffordtogotthemodernmuseumssincetheyhavemoretimenow.
Doyouneedanybodyto{{U}}assist{{/U}}youinyourwork?
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题{{B}}第一篇{{/B}} {{B}}??????? ?????EatHealthy{{/B}}??Cleanyour plate!andBeamemberoftheclean-plateclub!Justabouteverykidinthe UShasheardthisfromaparentorgrandparent.Oftenit’saccompaniedbyan appeal:JustthinkaboutthosestarvingorphansinAfrica!Sureweshouldbe gratefulforeverybiteoffood.UnfortunatelymanypeopleintheUStaketoo manybites.Insteadofstayingcleantheplateperhapsweshouldsavesome foodfortomorrow.??AccordingtonewsreportsUSrestaurantsare partlytoblameforthegrowingbellies.Awaiterputsaplateoffoodinfront ofeachcustomerwithtwotofourtimestheamountrecommendedbythe governmentaccordingtoaUSATodaystory.Americanstraditionallyassociate quantitywithvalueandmostrestaurantstrytogivethemthat.Theypreferto havecustomerscomplainabouttoomuchfoodratherthantoolittle.? ?BarbaraRollsanutritionprofessoratPennsylvaniaStateUniversity toldUSATodaythatrestaurantportionsizesbegantogrowinthe1970sthe sametimethattheAmericanwaistlinebegantoexpand.??Health expertshavetriedtogetmanyrestaurantstoservesmallerportions.Now apparentlysomecustomersarecallingforthistoo.Therestaurantindustry trademagazineQSRreportedlastmonththat57percentofmorethan4000 peoplesurveyedbelieverestaurantsserveportionsthataretoolarge;23 percenthadnoopinion;20percentdisagreed.Butacloserlookatthesurvey indicatesthatmanyAmericanswhocan’taffordfinediningstillprefer large-portions.70percentofthoseearningatleast$150000peryearprefer smallerportions;butonly45percentofthoseearninglessthan$25000want smaller.??It’snotthatworkingclassAmericansdon’twanttoeat healthy.It’sjustthatafterlonghoursatlow-payingjobsgettinglesson theirplatehardlyseemslikeagooddeal.Theylivefrompaychecktopaycheck happytosavealittlemoneyfornextyear’sChristmas presents.WhichofthefollowingisNottrueofworkingclassAmericans?
Below600feetoceanwatersrangefrom{{U}}dimly{{/U}}littocompletelydark.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断 {{B}}??????? ??????ChangesinMuseums{{/B}}? ?Museumshavechanged.?Theyarenolongerplacesthatoneshould visittheyareplacestoenjoyandlearn.??Atasciencemuseum inOntarioCanadayoucanfeelyourhairstandonendasharmlesselectricity passesthroughyourbody.AttheMetropolitan大城市的MuseumofArtinNewYork Cityyoucanlookattheseventeenthcenturyinstrumentswhilelisteningto theirmusic.AtNewYork’sAmericanMuseumofNaturalHistoryrecentlyyoucan helpmakeabone-by-bonereproductionofthemuseum’sdinosaur恐龙abeast thatlived200millionyearsago.??Moreandmoremuseumdirectors arerealizingthatpeoplelearnbestwhentheycansomehowbecomepartofwhat theyareseeing.Inmanysciencemuseumsforexampletherearenoguided tours.Thevisitorisencouragedtotouchlistenoperateandexperimentsoas todiscoverscientificprinciplesforhimself.Thepurposeisnotonlyto providefunbutalsotohelppeoplefeelathomeintheworldofscience.The theoryisthatpeoplewhodonotunderstandsciencewillprobablyfearitand thosewhofearsciencewillnotuseittobestadvantage.??One causeofallthesechangesistheincreaseinwealthandleisuretime.Another causeistherisingpercentageofyoungpeopleinthepopulation.Manyofthese youngpeoplearecollegestudentsorcollegegraduates.LeonF.Twiggsayoung blackprofessorofartoncesaidTheyseethingsinanewanddifferentway. Theyarenotsatisfiedtostandandlookatworksofart;theywantarttheycan participate参加in.Thesameistrueofscienceand history.Insciencemuseumstodaypeoplenolongerfeelstrangeintheworldofsciencebutgainscientificknowledgebythemselves.
RegenerationofLimbs Mostpeoplewouldagreethatitwouldbewonderfulifhumanscouldregeneratelimbs.Thosewhohavelosttheirarmsorlegswouldbecompleteagain.Thedayisstillfaroffwhenthismighthappen.Butinthelast10yearsdoctorshavereportedregenerationinsmallerpartsofthebodymostoftenfingers. Regenerationisnotanewly-discoveredprocess.Forcenturiesscientistshaveseenitworkinsomekindsofanimals.Breakoffalizards蜥蜴的tailforexampleanditwillgrowanewtail.Scientistsnowarelookingforawaytoturnonthisexcitingabilityinmorehighly-developedanimalsincludinghumans.Theirexperimentsshowthatnervescellchemistryandthenaturalelectriccurrentsinthebodyallseemtohaveapartinthisprocess. Thebodyofeveryanimalcontainsgeneralpurposecellsthatchangeintowhateverkindofcellsthebodyneeds.Animalssuchasthelizardorsalamander蝾螈usethesecellstoregenerateanewtailorlegwhentheoldoneisbrokenoff.Thesecellscollectaroundthewound.Theyformamasscalledablastema胚基.Thecellsoftheblastemabegintochange.Somebecomebonecellssomemusclecellssomeskincells.Slowlyanewpartre-growsfromthebodyoutward.Whencompletedthenewpartisjustliketheoldone. Morethan200yearsagoItalianscientistLuigiSpallanzanishowedthatyoungeranimalshaveagreaterabilitytoregeneratelostpartsthanolderanimals.Sodoanimalslowerontheladderofevolutionarydevelopment.Themajordifferenceseemstobethatless-developedanimalshavemorenervesintheirtailsandlegsthanhumansdointheirarmsandlegs. Anotherhelpfulpieceofinformationwasdiscoveredinthelate1800s.Scientistsfoundthatwhenacreatureisinjuredanelectricalcurrentflowsaroundthewound.Thestrengthofthecurrentdependsonhowseverethewoundisandonhowmuchnervetissueispresent. In1945AmericanscientistMerylRosetestedanotherideaaboutregeneration.Hethoughtanewlimbmightgrowonlyfromanopenwound.DoctorRosecutoffthefrontlegsofsomefrogsbelowtheknee.Hekeptthewoundswetwithastrongsaltyliquid.Thispreventedskinfromgrowingoverthewounds.Theresultsweresurprising.Frogsdonotregeneratenewlegsnaturally.Butthesefrogsbegantogrownewlimbs.Abouthalfofeachcut-offleggrewbackagain.Newbonesandmusclesdeveloped. Thisresearchhasleddoctorstonewwaysoftreatingcut-offfingers.Doctorshaveobservedforexamplethatmanychildrenandsomeadultswillre-growthetopofafingerifthewoundisleftopen. InDr.Rose’stestfrogswithcut-offlegs______.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
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OldMothers’ChildrenHaveHigherDiabetes糖尿病Risk Childrenofoldermothersrunahigherriskofdevelopinginsulin-dependent胰岛素依赖型的diabetestheBritishMedicalJournalsaid.Astrongassociationwasfoundbetweenincreasingmaternal母亲的ageatdeliveryandriskofinsulin-dependentdiabetesinthechild.RiskwashighestinfirstbornchildrenanddecreasedprogressivelywithhigherbirthorderProfessorEdwinGaleandcolleaguesatSouthmeadHospitalinBristolsaid.Diabetesisaseriousincurablelifelongdiseasecharacterized以......作为特性byallinabilitytocontroltheamountofsugarintheblood.Insulin-dependentdiabeteswhichmainlyaffectschildrenistreatedbyadministeringthehormoneinsulin.Galelookedinto1375familiesintheOxfordareawhereoneormorechildrenhaddiabetesandfoundthattheriskofachilddevelopinginsulin-dependentdiabetesincreasedby25percentforeachfive-yearbandofthemothersage. Theriskofdevelopingdiabeteswasalsolinkedtotheageofthefather.Foreveryfive-yearbandofthefather’’sagetheriskofthechilddevelopingdiabetesincreasedbyninepercent.Theriskofdiabeteswashigh?estamongthefirstbornchildrenofmotherswhostartedtheirfamilieslateandtheriskdecreasedbyabout15percentforeachsubsequentchildtheBMJsaid.Theolderthemothertheearlierthestartofinsulin-dependentdiabetesinthechild.Otherstudieshavealreadyshownthatchildrenborntooldermothersovertheageof35haveanincreasedriskofdiabetesbutthisstudyisthefirsttoestablishthatriskincreasescontinuouslyinrelationtoincreasingmaternalageDr.PollyBingleyofSouthmeadHospitaltoldReuters路透社.Thenewstudyisthefirsttoshowthatriskisrelatedtobirthorder. Thestudyalsopartlyexplainsincreasingdiabetes.Between1970and1996theproportionofchildrenborntomothersagedbetween30and34increasedto28percentfrom15percentandthiscouldaccountforrisingnumbersofchildhooddiabetespatientsthescientistssaidinthealarmingincreaseintherateofinsulin-dependentdiabetesamongchildreninrecentyears.Thisstudymaywellprovideacluetotheunderstandingofthisproblem.ItismostlikelythatthereareanumberoffactorstoexplaintheincreaseDiabetesUKsaid.Therearesome1.4milliondiagnoseddiabetessufferersinBritainthecharityDiabetesUKsaid.Ofthese1.4millionsufferersthereare20000peopleunderage20whosufferfrominsulin-dependentdiabetes. AccordingtothepassagethealarmingincreaseintherateofdiabetesamongchildrenintheUKmaypartlybeexplainedbytherisein______.
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题{{B}}第一篇{{/B}} {{B}}??????? ?????EatHealthy{{/B}}??Cleanyour plate!andBeamemberoftheclean-plateclub!Justabouteverykidinthe UShasheardthisfromaparentorgrandparent.Oftenit’saccompaniedbyan appeal:JustthinkaboutthosestarvingorphansinAfrica!Sureweshouldbe gratefulforeverybiteoffood.UnfortunatelymanypeopleintheUStaketoo manybites.Insteadofstayingcleantheplateperhapsweshouldsavesome foodfortomorrow.??AccordingtonewsreportsUSrestaurantsare partlytoblameforthegrowingbellies.Awaiterputsaplateoffoodinfront ofeachcustomerwithtwotofourtimestheamountrecommendedbythe governmentaccordingtoaUSATodaystory.Americanstraditionallyassociate quantitywithvalueandmostrestaurantstrytogivethemthat.Theypreferto havecustomerscomplainabouttoomuchfoodratherthantoolittle.? ?BarbaraRollsanutritionprofessoratPennsylvaniaStateUniversity toldUSATodaythatrestaurantportionsizesbegantogrowinthe1970sthe sametimethattheAmericanwaistlinebegantoexpand.??Health expertshavetriedtogetmanyrestaurantstoservesmallerportions.Now apparentlysomecustomersarecallingforthistoo.Therestaurantindustry trademagazineQSRreportedlastmonththat57percentofmorethan4000 peoplesurveyedbelieverestaurantsserveportionsthataretoolarge;23 percenthadnoopinion;20percentdisagreed.Butacloserlookatthesurvey indicatesthatmanyAmericanswhocan’taffordfinediningstillprefer large-portions.70percentofthoseearningatleast$150000peryearprefer smallerportions;butonly45percentofthoseearninglessthan$25000want smaller.??It’snotthatworkingclassAmericansdon’twanttoeat healthy.It’sjustthatafterlonghoursatlow-payingjobsgettinglesson theirplatehardlyseemslikeagooddeal.Theylivefrompaychecktopaycheck happytosavealittlemoneyfornextyear’sChristmas presents.ParentsintheUnitedStatestendtoasktheirchildren______.
Sulphurhas{{U}}occasionally{{/U}}beenfoundintheearthinanalmostpurestate.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
Weshouldbe{{U}}cautious{{/U}}incrossingacrowdedstreet.
EdwinHubble EdwinHubblechangedourideasabouttheuniverseandhowitdeveloped.Theworkoffewotherscientistschangedourunderstandingof【51】suddenly.Hemadehismostimportantdiscoveriesinthe1920s.Todayotherscientistscontinuetheworkhebeganbackthen.EdwinPowellHubblewasbornin1889inMarshfieldMissouri.He【52】hisearlyyearsinthestateofKentucky.ThenhemovedwithhisfamilytoChicagoIllinois.HeattendedtheUniversityofChicagotakingmathematicsandastronomy【53】hisspecialty. AsastudentHubblewasalsoamemberoftheUniversity’’sbasketballteamandanexcellentboxer.Severalpeopleurgedhim【54】fortheworldheavyweightboxingchampionshipaftercollege.Insteadhedecidedtocontinuehis【55】. InhisfirstobservationsfromMountWilsonCaliforniaHubbleusedatelescopewithone-hundredfifty-twoandbegan【56】moreandmoredistantobjects.Hisfirstgreatdiscoverywasmade【57】herecognizedaCepheidvariablestar.Cepheidvariablestarsarestarswhosebrightnesschangesatregularperiods. Hubblethenbegantoobservemoredetailsaboutgalaxies.Hestudiedtheirshapesandbrightness.By1925hehadmadeenoughobservationstosaythattheuniverseisorganizedintomanyshapesandsizes. Asstarsdifferfromoneanotherhesaid【58】galaxies.Accordingtohisobservationsthegalaxieshaveacenterandarmsofmatterthatseemtothecenterlikeapinwheel.Otherareshaped【59】baseballsoreggs.Afewhavenospecial【60】Hubbleproposedasystemtodescribegalaxiesbytheirshape.Hissystemisstillusedtoday.Healsoshowedthat【61】aresimilarinthekindsofbrightobjectstheycontain.Allgalaxies【62】arerelatedtoeachothermuchasmembersofafamilyarerelatedtoeachother. Inthelate1920sHubblestudiedthemovementofgalaxiesthroughspace.Hisinvestigationledtothemostimportant【63】discoveryofthe20thcentury—theexpandinguniverse. Hubbiesdiscovery【64】amajorchangeinourideasoftheuniverse.Theuniversehadnotbeenquietandunchangingsincethebeginningoftimeasmanypeoplehadthought.Itwasexpanding.Theexpandingoftenis【65】theBigBang.
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