首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
Europa’swatery underworld Europa, one of Jupiter’s 63 known moons,looks bright and icy on the sur...
查看本题答案
包含此试题的试卷
理工类《单选集》真题及答案
点击查看
你可能感兴趣的试题
关于木星的四颗伽利略卫星说法错误的是
木卫四Callisto是伽利略卫星中唯一的一颗非同步自转卫星。
木卫一Io表面的火山活动非常剧烈。
木卫二Europa冰冻的外壳下很可能存在着液态海洋。
木卫三Ganymede是太阳系中体积最大的卫星。
阅读理解根据短文内容选择最恰当的答案Aftermonthsofhardworkit'stimetoh
Somemythsarestoriestoldsinceancienttimestoexplaint
Somemythsarestoriestoldsinceancienttimestoexplaint
Somemythsarestoriestoldsinceancienttimestoexplaint
Somemythsarestoriestoldsinceancienttimestoexplaint
Thenexttimesomeoneasksyouwherethebiggestoceanispoi
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Not mention
Somemythsarestoriestoldsinceancienttimestoexplaint
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Not mention
Persephonecouldgobacktohermotherifshehadnotanythin
Somemythsarestoriestoldsinceancienttimestoexplaint
六.Clozetest.Somemythsarestoriesusedsinceancienttim
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Not mention
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Not mention
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Notmention
Europa’swateryunderworld EuropaoneofJupiter’s63kn
Right
Wrong
Not mention
______isfamousforitsvividdescriptionsoftheworkhous
Oliver Twist
Great Expectations
David Copper Field
Hard Times
8分Sinceearlytimespeople1fascinatebytheideaoflifee
Directions:Completethefollowingpassagebyusingthewo
热门试题
更多
ReducePackagingPressureincreasedrecentlyonBritishsupermarketsandretailerstoreducepackagingaspartofananti-wastecampaign.46Britaingenerates4.6milliontonsofhouseholdwasteeveryyearbypackaging.Dozensofpeoplehaveexpressedangerattheexcessofplasticwrapping.CampaignershavecalledonBritaintolearnfromotherEuropeancountries.47Whenreturnedbottlesareputinavendingmachine自动售货机thedepositisrefunded.EnvironmentalistswarnthatBritainlagsbehindinthis.Therewerereportsofgrowinguneaseamongconsumersovertheamountofpackagingtheyhavetodealwith.Tradestandardsofficersalsoobjecttoexcessivepackaging.48InresponsetoacampaignbyBritain’sTheIndependentnewspaperleadingsupermarketshavepointedtovariousinitiativestowinthepublicconfidence.49Butcampaignerssaidretailersandthegovernmentcouldlearnmuchfromanti-wastepracticesontheContinent.InSwedennon-recyclablebatterieshavebeentaxedsince1991toencourageaswitchtoalternatives.50InGermanyplasticbagsareunheardofinsupermarketsanddepositsarepaidforreusableplasticandglassbeveragebottles. 49
Chimpanzees1.Chimpanzees黑猩猩willsoonbeextinct灭绝.Ifthepresentrateofhuntingandhabitat栖息地destructioncontinuesthenwithin20yearstherewillbenochimpanzeeslivinginthewild.Butthisismorethananenvironmentalormoraltragedy悲剧.Chimpanzeeextinctionmayalsohaveprofoundimplications含意forthesurvivaloftheirdistantrelatives--humanbeings.2.In1975thebiologistMarie-ClaireKingandAllanWilsondiscoveredthatthehumanandchimpanzeegenomes基因组matchbyover98%.Comparethistothemouseusedasmodelforhumandiseaseinlabtestswhichsharesonly60%ofitsDNAwithus.Infactchimpanzeesarefarmoresimilartohumansthantheyaretoanyotherspectesofmonkey.AswellasresemblingUSgeneticallychimpsarehighlyintelligentandabletousetools.Thesefactsaloneshouldbeenoughtomakeprotectionofchimpsanurgentpriority优先.Butthereisanothermoreselfishreasontopreservethechimp.3.Thechimpanzees’trumpcard王牌comesinthefieldofmedicalresearch.Chimpanzeesaresosimilartohumansthatveterinarians兽医oftenrefertohumanmedicaltextbookswhentreatingthem.Yetchimpanzeesdoshowdifferencesinseveralkeyareas.Inparticularchimpsaremuchmoreresistanttoanumberofmajordiseases.Itisthisabilitythatissointeresting.4.ForexamplechimpsseemtoshowamuchhigherresistancethanhumanstoHIVthevirusthatcausesAIDS.IndeedtheiruseasexperimentalanimalsinAIDSresearchhasdeclinedbecausetheyaresoresistant.5.Bysequencingthechimpgenomeandpinpointing找到theplacewherethechimpanzeeDNAsequencediffersfromthatofhumansscientistshopetobeabletodiscoverwhichpartofthegeneticcodegiveschimpstheirincreasedresistancetosomediseases.Thistheyhopewillallowthemtodevelopnewandmoreeffectivetreatmentsforthehumanformsofthesediseases.Suchtreatmentscouldincludetheproductionofnewdrugsoreventhealterationgilaofthehumangeneticsequence.Therecentlycompletedhumangenomesequencingprojecthasshownthatsuchaneffortisnowwellwithinourreach. Paragraph3
{{*HTML*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.Thereismorerainfall
{{*HTML*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.Radarisusedtodeterminethecharacteristicsofradiocarbon.
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.TheYouthEmancipationprogrammeaimsathelpingyoungpeople
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
Scientistssuspectthatgenesplayasignificantroleinprotectingchimpsfromgetting
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.Thephrasewaryofinparagraph8couldbebestreplacedby
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}Mind-reading Machine{{/B}}??AteamofresearchersinCaliforniahasdevelopeda waytopredictwhatkindsofobjectspeoplearelookingatbyscanning扫描what’s happeningintheirbrains.??Whenyoulookatsomethingyoureyes sendasignalaboutthatobjecttoyourbrain.Differentregions?ofthe brainprocesstheinformationyoureyessend.Cellsinyourbraincalled neurons神经元areresponsibleforthisprocessing.??The fMRlfunctionalMagneticResonanceImaging功能怕磁振造影brainscanscouldgenerally matchelectricalactivityinthebraintothebasicshapeofapicturethat someonewaslookingat.??Likeceilsanywhereelseinyourbody activeneuronsuseoxygen.Bloodbringsoxygentotheneuronsandthemore activeaneuronisthemoreoxygenitwillconsume.Themoreactivearegionof thebrainthemoreactiveitsneuronsandinturnthemorebloodwilltravel tothatregion.AndbyusingfMRIscientistscanvisualize使显现whichparts ofthebrainreceivemoreoxygen-richblood--andthereforewhichpartsare workingtoprocessinformation.??AnfMRImachineisadevicethat scansthebrainandmeasureschangesinbloodflowtothebrain.Thetechnology showsresearchershowbrainactivitychangeswhenapersonthinkslooksat somethingorcarriesoutanactivitylikespeakingorreading.By {{B}}highlightingtheareasofthebrainatwork{{/B}}whenapersonlooksat differentimagesfMRImayhelpscientistsdeterminespecificpatternsofbrain activityassociated?withdifferentkindsofimages.??The Californiaresearcherstestedbrainactivitybyhavingtwovolunteersview hundredsofpicturesofeverydayobjectslikepeopleanimalsandfruits.The scientistsusedanfMRImachinetorecordthevolunteers’?brainactivity witheachphotographtheylookedat.Differentobjectscauseddifferentregions ofthevolunteers’brainstolightuponthescanindicatingactivity.The scientistsusedthisinformationtobuildamodeltopredicthowthebrainmight respondtoanyimagetheeyessee.??Inasecondtestthe scientistsaskedthevolunteerstolookat120newpictures.Likebeforetheir brainswerescannedeverytimetheylookedatanewimage.Thistimethe scientistsusedtheirmodeltomatchthefMRIscanstotheimage.Forexample ifascaninthesecondtestshowedthesamepatternofbrainactivitythatwas stronglyrelatedtopicturesofapplesinthefirsttesttheirmodelwouldhave predicted?thevolunteerswerelookingat apples.ThefunctionofanfMRImachineis
{{*HTML*}}请根据短文内容为每处空白确定1个最佳选项 {{B}}TakingaNapDuringthe Day{{/B}}??MedicalexpertssaymostAmericansdonotgetenough sleep.TheysaymoreAmericansneedto??{{U}}?51?{{/U}} forashortperiodinthemiddleoftheday.Theyareadvisingpeopletosleep lightly??{{U}}?52?{{/U}}continuingwithother activities.??Onestudyearlierthisyearfoundthatpersonswho sleepforafewminutesduringthedaywerelesslikelytodieof{{U}}?53 ?{{/U}}disease.Thestudyfollowedmorethan2300Greekadults {{U}}?54?{{/U}}aboutsixyears.Adultswhorestedforhalfanhourat leastthreetimesaweekhada37percentlower??{{U}}?55 ?{{/U}}ofdyingfromheartdiseasethanthosewhodidnotnap.? ?Studyorganizerssaidthestrongest{{U}}?56?{{/U}}wasinworking men.Theysaidnapsmightimprovehealthbymitigating减低tension {{U}}?57?{{/U}}bywork.??SomeEuropeanandLatin AmericanbusinesseshaveSupportedtheideaof{{U}}?58?{{/U}}formany gears.Theyurge催促peopleto{{U}}?59?{{/U}}workgohomeandhavea napbeforereturning.IntheUnitedStatessomecompaniesletworkersrest brieflyintheiroffices.Theybelievethisreducesmistakesandaccidentsand also{{U}}?60?{{/U}}theamountofworkapersoncando.? ?Sleepexpertssayitislikelythatpeople{{U}}?61?{{/U}}more mistakesatworkthanatothertimes.Theysaypeopleshouldnotcarryout importantduties{{U}}?62?{{/U}}theyfeelsleepy.Andtheysaythe ]restthingtodoistotakeanap.Abouttwentyminutesofrestisallyou {{U}}?63?{{/U}}.Expertssaythisprovidesextraenergyandcan increaseyour{{U}}?64?{{/U}}untiltheendoftheday.Butexperts ?{{U}}?65?{{/U}}thatanapshouldlastnomorethantwentyto thirtyminutes.Alongernapwillputthebodyintodeepsleepandwakingup willbedifficult.
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.Theradiocarbondatingtechniqueisonlyabout40yearsold.
ThereisalwaysexcitementattheolympicGameswhenanathlete{{U}}breaks{{/U}}arecord.
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.Youngpeople’sfamilydependencecanbeattributedtoallthefollowingfactorsEXCEPT
Tenyearsaftertheeventherdeathstillremainsa{{U}}puzzle{{/U}}.
Thetraditionalpaintingsare{{U}}exhibited{{/U}}onthesecondfloor.
{{*HTML*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.WhenanorganismdiestheC-14initbeginstodecay.
ReducePackagingPressureincreasedrecentlyonBritishsupermarketsandretailerstoreducepackagingaspartofananti-wastecampaign.46Britaingenerates4.6milliontonsofhouseholdwasteeveryyearbypackaging.Dozensofpeoplehaveexpressedangerattheexcessofplasticwrapping.CampaignershavecalledonBritaintolearnfromotherEuropeancountries.47Whenreturnedbottlesareputinavendingmachine自动售货机thedepositisrefunded.EnvironmentalistswarnthatBritainlagsbehindinthis.Therewerereportsofgrowinguneaseamongconsumersovertheamountofpackagingtheyhavetodealwith.Tradestandardsofficersalsoobjecttoexcessivepackaging.48InresponsetoacampaignbyBritain’sTheIndependentnewspaperleadingsupermarketshavepointedtovariousinitiativestowinthepublicconfidence.49Butcampaignerssaidretailersandthegovernmentcouldlearnmuchfromanti-wastepracticesontheContinent.InSwedennon-recyclablebatterieshavebeentaxedsince1991toencourageaswitchtoalternatives.50InGermanyplasticbagsareunheardofinsupermarketsanddepositsarepaidforreusableplasticandglassbeveragebottles. 47
{{*HTML*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.Liquidwateronlyexists
{{*HTML*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.MostofthefleshwateronEarth
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}Mind-reading Machine{{/B}}??AteamofresearchersinCaliforniahasdevelopeda waytopredictwhatkindsofobjectspeoplearelookingatbyscanning扫描what’s happeningintheirbrains.??Whenyoulookatsomethingyoureyes sendasignalaboutthatobjecttoyourbrain.Differentregions?ofthe brainprocesstheinformationyoureyessend.Cellsinyourbraincalled neurons神经元areresponsibleforthisprocessing.??The fMRlfunctionalMagneticResonanceImaging功能怕磁振造影brainscanscouldgenerally matchelectricalactivityinthebraintothebasicshapeofapicturethat someonewaslookingat.??Likeceilsanywhereelseinyourbody activeneuronsuseoxygen.Bloodbringsoxygentotheneuronsandthemore activeaneuronisthemoreoxygenitwillconsume.Themoreactivearegionof thebrainthemoreactiveitsneuronsandinturnthemorebloodwilltravel tothatregion.AndbyusingfMRIscientistscanvisualize使显现whichparts ofthebrainreceivemoreoxygen-richblood--andthereforewhichpartsare workingtoprocessinformation.??AnfMRImachineisadevicethat scansthebrainandmeasureschangesinbloodflowtothebrain.Thetechnology showsresearchershowbrainactivitychangeswhenapersonthinkslooksat somethingorcarriesoutanactivitylikespeakingorreading.By {{B}}highlightingtheareasofthebrainatwork{{/B}}whenapersonlooksat differentimagesfMRImayhelpscientistsdeterminespecificpatternsofbrain activityassociated?withdifferentkindsofimages.??The Californiaresearcherstestedbrainactivitybyhavingtwovolunteersview hundredsofpicturesofeverydayobjectslikepeopleanimalsandfruits.The scientistsusedanfMRImachinetorecordthevolunteers’?brainactivity witheachphotographtheylookedat.Differentobjectscauseddifferentregions ofthevolunteers’brainstolightuponthescanindicatingactivity.The scientistsusedthisinformationtobuildamodeltopredicthowthebrainmight respondtoanyimagetheeyessee.??Inasecondtestthe scientistsaskedthevolunteerstolookat120newpictures.Likebeforetheir brainswerescannedeverytimetheylookedatanewimage.Thistimethe scientistsusedtheirmodeltomatchthefMRIscanstotheimage.Forexample ifascaninthesecondtestshowedthesamepatternofbrainactivitythatwas stronglyrelatedtopicturesofapplesinthefirsttesttheirmodelwouldhave predicted?thevolunteerswerelookingat apples.Theresearchersexperimentedon
Wouldyouplease{{U}}call{{/U}}myhusbandassoonaspossible?
Chimpanzeeextinctionmayaffect
Thechairman{{U}}proposed{{/U}}thatwestopthemeeting.
Whycan'tyoustopyour{{U}}eternal{{/U}}complaining?
Thesepaintingsareconsideredbymanytobe{{U}}authentic{{/U}}.
Chimpanzees1.Chimpanzees黑猩猩willsoonbeextinct灭绝.Ifthepresentrateofhuntingandhabitat栖息地destructioncontinuesthenwithin20yearstherewillbenochimpanzeeslivinginthewild.Butthisismorethananenvironmentalormoraltragedy悲剧.Chimpanzeeextinctionmayalsohaveprofoundimplications含意forthesurvivaloftheirdistantrelatives--humanbeings.2.In1975thebiologistMarie-ClaireKingandAllanWilsondiscoveredthatthehumanandchimpanzeegenomes基因组matchbyover98%.Comparethistothemouseusedasmodelforhumandiseaseinlabtestswhichsharesonly60%ofitsDNAwithus.Infactchimpanzeesarefarmoresimilartohumansthantheyaretoanyotherspectesofmonkey.AswellasresemblingUSgeneticallychimpsarehighlyintelligentandabletousetools.Thesefactsaloneshouldbeenoughtomakeprotectionofchimpsanurgentpriority优先.Butthereisanothermoreselfishreasontopreservethechimp.3.Thechimpanzees’trumpcard王牌comesinthefieldofmedicalresearch.Chimpanzeesaresosimilartohumansthatveterinarians兽医oftenrefertohumanmedicaltextbookswhentreatingthem.Yetchimpanzeesdoshowdifferencesinseveralkeyareas.Inparticularchimpsaremuchmoreresistanttoanumberofmajordiseases.Itisthisabilitythatissointeresting.4.ForexamplechimpsseemtoshowamuchhigherresistancethanhumanstoHIVthevirusthatcausesAIDS.IndeedtheiruseasexperimentalanimalsinAIDSresearchhasdeclinedbecausetheyaresoresistant.5.Bysequencingthechimpgenomeandpinpointing找到theplacewherethechimpanzeeDNAsequencediffersfromthatofhumansscientistshopetobeabletodiscoverwhichpartofthegeneticcodegiveschimpstheirincreasedresistancetosomediseases.Thistheyhopewillallowthemtodevelopnewandmoreeffectivetreatmentsforthehumanformsofthesediseases.Suchtreatmentscouldincludetheproductionofnewdrugsoreventhealterationgilaofthehumangeneticsequence.Therecentlycompletedhumangenomesequencingprojecthasshownthatsuchaneffortisnowwellwithinourreach. Paragraph1
Maryevidentlyisthemost{{U}}diligent{{/U}}studentamongus.
热门题库
更多
语文
中石油职称英语
理工类
卫生类
综合类
国际货运代理师
报关水平测试
报检员
物流员(四级)
助理物流师(三级)
物流师(二级)
高级物流师(一级)
物流案例分析
单证员基础理论与知识
单证员缮制与操作
国际货运代理理论与实务
湘公网安备 43130202000226号