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? ?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。 ? ?Attempts to understand the relationship betwe...
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{{*HTML*}}{{B}}第二篇{{/B}} ??????? ??{{B}}FortyMayBetheNew30AsScientistsRedefine Age{{/B}}??Is40reallythenew30?Inmanywayspeopletodayact youngerthantheirparentsdidatthesameage.??Scientistshave definedanewageconceptandbelieveitcouldexplainwhypopulationsare agingbutatthesametimeseemtobegettingyounger.??Instead ofmeasuringagingbyhowlongpeoplehavelivedthescientistshavefactored inhowmanymoreyearspeoplecanprobablystilllookforwardto.? ?Usingthatmeasuretheaveragepersoncangetyoungerinthesensethat heorshecanhaveevenmoreyearstoliveastimegoesonsaidWarren SandersonoftheUniversityofNewYorkinStonyBrook.??Heand SergeiScherbovoftheViennaInstituteofDemography人口统计学attheAustrian 奥地利的AcademyofScienceshaveusedtheirmethodtoestimatehowthe proportionofelderlypeopleinGermanyJapanandtheUnitedStateswillchange inthefuture.??TheaverageGermanwas39.9yearsoldin2000 andcouldplantoliveforanother39.2yearsaccordingtoresearchreportedin thejournalNatureonWednesday.??Howeverby2050theaverage Germanwillbe51.9yearsoldandwillbeexpectedtoliveanother37.1years. Somiddleagein2050wouldoccurataround52yearsinsteadof40yearsasin 2000.??Aspeoplehavemoreandmoreyearstolivetheyhaveto savemoreandplanmoreandtheyeffectivelyarebehavingasiftheywere youngersaidSanderson.??FiveyearsagotheaverageAmerican was35.3yearsoldandcouldplanfor43.5moreyearsoflife.By2050the researchersestimateitwillincreaseto41.7yearsand45.8future years.??Alotofourskillsoureducationoursavingsandthe waywedealwithourhealthcaredependagreatdealonhowmanyyearswehave tolivesaidSanderson.??Thisdimensionofhowmanyyears peoplehavetolivehasbeencompletelyignoredinthediscussionofagingso far.Thenewageconceptwasdevelopedoutofthenotionof
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??{{B}}IstheTieaNecessity?{{/B}}??Tiesorneckties havebeenasymbol’ofpolitenessandeleganceinBritainforcenturies.Butthe casualPrimeMinisterTonyBlairhasproblemswiththem.Reportssuggestthat eventhecivilservantsmaystopwearingties.Soarethefamouslyformal Britishreallygoingtoabandontheneckties???Maybe.Lastweek theUK’sCabinetSecretaryAndrewTurnbullopenlywelcomedatielessera.He hintedthatcivilservantswouldsoonbefreeofthecostliest12inchesof fabricthatmostmeneverbuyintheirlives.??InfactBlair showedthisattitudewhenhehadhisfirstgueststoacocktailparty.Manyof themwerecelebrities知名人士withouttieswhichwouldhavebeenunimaginable evenintherecentpast.??ForsomemoreconservativeBritishthe tieisamustforproperappearance.EarlierLaborleaderJimCallaghansaidhe wouldhavediedratherthanhavehischildrenseeninpublicwithoutatie.For peoplelikeCallaghanthetiewasasignofbeingcompleteofshowingrespect. Menweresupposedtowearatiewhengoingtochurchtoworkintheofficeto aparty-almosteverysocialoccasion.??Buttodaypeoplehave beguntoacceptacasualstyleevenforformaloccasions.??The originofthetieistricky.Itstartedassomethingcalledsimplyaband.The termcouldmeananythingaroundaman’sneck.Itappearedinfinerwaysinthe 1630s.Frenchmenshowedaloveofthisparticularfashionstatement.Their neckwear颈饰impressedCharlesIIthekingofEnglandwhowasexiled流放to Franceatthattime.WhenhereturnedtoEnglandin1660hebroughtthisnew fashionitemalongwithhim.??Itwasn’thoweveruntilthelate 18thcenturythatfancyyoungmenintroducedamorecolorfulflowingpieceof cloththateventuallybecameknownasthetie.Thenclubsmilitary institutionsandschoolsbegantousecoloredandpatternedtiestoindicatethe wearer’smembershipinthelate19上标thcentury.Afterthatthetiebecamea necessaryitemofclothingforBritishgentlemen.??Butnoweven gentlemenaregettingtiredofties.Anywaythedayfeelsabiteasierwhenyou wakeupwithouthavingtodecidewhichtiesuitsyouandyour mood.Thetiesymbolizesallofthefollowingexcept
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
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{{*HTML*}} ???Souped-up效力增强了的enzymesthat flushpoisonsoutofcellsmoreefficientlythantheirnatural counterparts对应的人或物couldalleviatesomeoftheseveresideeffectsof chemotherapyandsoimprovethechancesofcuringcancers.?? ?Manyanticancerdrugsattacktumorcellsbecausetheydividemorerapidly thanheathycells.Butsomevitalhealthycellsalsodividefasterthanormal andthesearedestroyedaswell.Themostvitalcellscaughtinthechemical cross-firearethosemadeinthebonemarrow骨髓.Undernormalcircumstances thesematureintoplatelets血小板whicharevitalforwound-healingandwhite bloodcellsthatfightinfections.Iflevelsofthesecellsfallpatients becomedangerouslyvulnerabletoinfectionandcansuffersuchsevereinternal bleedingthattreatmenthastobestopped.Survivingcancercellscanthen re-growandreducetheeffectivenessofthetherapy.?? ?BillFehlandhiscolleaguesattheUniversityofWisconsinMedicalSchool haveengineeredanenzymethatcouldmakebonemarrowcellsresistanttothe cancerdrugssohigherdosescanbegivenandsideeffectsreduced.Theideais totakehealthybonemarrowcellsfrompatientsbeforetheybeginchemotherapy thenequipthesecellswiththegenesthatmaketheenzymedrug-resistant.When returnedtothepatienttheimprovedbonemarrowcellscouldthenwithstand heavydosesofthedrugs.???Thenaturalversionofthe enzyme—calledglutathioneStransferase谷胱甘肽S转移酶—isproducedmainlyinthe liverandcatalyses催化thebreakdownofcompoundsthatmightotherwisedamage DNAincells.GSTalsoneutralizes中和thetoxicbreakdownproductsof anticancerdrugswhichmakesitsuitableforprotectingbonemarrowcells.But naturalGSTdoesnotworkefficientlyenoughtoavoidbeingswampedbyhigh dosesofdrugs.??GSTcatalysesareactionbetweenpotentially toxiccompoundsandglutathione—apeptide肽producedinalmostallcellsof thebody.TheGSTmoleculehasacavityoractivesitewherethetwo moleculesarebroughtcloseenoughtoreact.Thisneutralizesthetoxinwhich passesintothebloodtobeexcretedinthepatient’surine.?? Usingmachinesforsynthesizing结合使合成DNAFehlandhiscolleaguesmade thousandsofscrambledversionsofthepartsoftheGSTgenethatmakethe activesiteoftheenzyme.TheyinsertedthesescrambledgenesintoEscherichia coll.Byexposingthebacteriatoincreasingquantitiesoftheanticancerdrug mechlorethamine氮芥Fehlscreenedouttheonesmosttoleranttothedrug. ??Bythismethodwemadeenzymes30timesasefficientasthe naturalonesaysFehl.Inotherwordsittook30timesasmuchdrugtokill thebacteria.???Fehlhasalreadyexposedmicecarrying copiesofthedoctoredgenetoknowncarcinogens致癌物toseehowefficientthe geneisatmoppingupthetoxins.Themoreefficientitisthelessdamagethe toxinsdoandfewertumorsshouldappear.???Weanticipate asignificantreductioninthenumberofcancersinthegroupcarryingthe genesaysFehlwhoisstillanalyzingtheresults.Fehl’steamhasapplied forapatentcoveringthetechniqueandhopestodeveloptreatmentswith SystemixacompanybasedinPaloAltoCalifornia.?? ?BrianKettererwhoheadstheCancerResearchCampaign’smolecular toxicologygroupinLondonsaysFehl’sworkcouldbeimportant.Buthewarns thattheproposedstrategywouldnotprotectcellsliningthegutfrom chemotherapydrugs.ThestrategyproposedbyFehlcanprotectcellsinvariouspartsofthebodyfromchemotherapydrugs.
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
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{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??{{B}}IstheTieaNecessity?{{/B}}??Tiesorneckties havebeenasymbol’ofpolitenessandeleganceinBritainforcenturies.Butthe casualPrimeMinisterTonyBlairhasproblemswiththem.Reportssuggestthat eventhecivilservantsmaystopwearingties.Soarethefamouslyformal Britishreallygoingtoabandontheneckties???Maybe.Lastweek theUK’sCabinetSecretaryAndrewTurnbullopenlywelcomedatielessera.He hintedthatcivilservantswouldsoonbefreeofthecostliest12inchesof fabricthatmostmeneverbuyintheirlives.??InfactBlair showedthisattitudewhenhehadhisfirstgueststoacocktailparty.Manyof themwerecelebrities知名人士withouttieswhichwouldhavebeenunimaginable evenintherecentpast.??ForsomemoreconservativeBritishthe tieisamustforproperappearance.EarlierLaborleaderJimCallaghansaidhe wouldhavediedratherthanhavehischildrenseeninpublicwithoutatie.For peoplelikeCallaghanthetiewasasignofbeingcompleteofshowingrespect. Menweresupposedtowearatiewhengoingtochurchtoworkintheofficeto aparty-almosteverysocialoccasion.??Buttodaypeoplehave beguntoacceptacasualstyleevenforformaloccasions.??The originofthetieistricky.Itstartedassomethingcalledsimplyaband.The termcouldmeananythingaroundaman’sneck.Itappearedinfinerwaysinthe 1630s.Frenchmenshowedaloveofthisparticularfashionstatement.Their neckwear颈饰impressedCharlesIIthekingofEnglandwhowasexiled流放to Franceatthattime.WhenhereturnedtoEnglandin1660hebroughtthisnew fashionitemalongwithhim.??Itwasn’thoweveruntilthelate 18thcenturythatfancyyoungmenintroducedamorecolorfulflowingpieceof cloththateventuallybecameknownasthetie.Thenclubsmilitary institutionsandschoolsbegantousecoloredandpatternedtiestoindicatethe wearer’smembershipinthelate19上标thcentury.Afterthatthetiebecamea necessaryitemofclothingforBritishgentlemen.??Butnoweven gentlemenaregettingtiredofties.Anywaythedayfeelsabiteasierwhenyou wakeupwithouthavingtodecidewhichtiesuitsyouandyour mood.WhendidBritishgentlemenbegintoweartiesregularly?
{{*HTML*}} ??Cancerisadiseaseinwhichcells multiplywithoutcontroldestroyhealthytissueandendangerlife.About100 kindsofcancerattackhumanbeings.Thediseaseisaleadingcauseofdeathin manycountries.IntheUnitedStatesandCanadaonlydiseasesoftheheartand bloodvesselskillmorepeople.Canceroccursinmostspeciesofanimalsandin manykindsofplantsaswellasinhumanbeings.??2.? ?Cancerstrikespeopleofallagesbutespeciallymiddle-agedpersonsand theelderly.Itoccursaboutequallyamongpeopleofbothsexes.Thediseasecan attackanypartofthebodyandmayspreadtootherparts.Howevertheparts mostoftenaffectedaretheskinthedigestiveorgansthelungsthemale prostateandthefemalebreasts.??3.??Scientistsdo notknowexactlywhycancerdevelops.Mostexpertsagreethatpeopledevelop cancermainlythroughrepeatedorprolongedcontactwithoneormore cancer-causingagentscalledcarcinogens.Theseagentsincludethetarsin tobaccosmokeavarietyofotherchemicalsandcertainkindsofradiation.In manycasescancercanbepreventedifaknownagentisavoidedoreliminated. Theeliminationofcigarettesmokingforexamplewouldpreventmostcasesof lungcancerandaboutathirdofallcasesofcancer.Scientistsalsobelieve thatsomepeoplemayinheritatendencytodevelopcancer.??4. ??Withoutpropertreatmentmostkindsofcancerarefatal.Onlya doctorcandiagnosecancer.Butinmanycasesadoctorisconsultedonlyafter thediseaseisfaradvanced.Apersonshouldthereforebealerttoanyphysical changethatmaybeasymptomofcancer.Earlydetectiongreatlyincreasesthe chancesofacure.??5.??Cancershowsnosymptomsin itsbeginningstages.Butsymptomsmayappearbeforethediseasespreads.The AmericanCancerSocietylistssevensuchwarningsignals.Theyare:1Change inbowelorbladderhabits;2Asorethatdoesnotheal;3Unusualbleeding ordischarge;4Thickeningorlumpinbreastorelsewhere;5Indigestionor difficultyinswallowing;6Obviouschangeinwartormole;7Naggingcough orhoarseness.Apersonwhohasanyofthesesymptomslongerthantwoweeks shouldconsultaphysicianpromptly.Paragraph5.______.
{{*HTML*}}??下面的短文有5处空白短文后有6个句子其中5个取自短文请根据短文内容将其分别放回原有位置以恢复文章原貌 ?????????? ???????{{B}}Female Bullfighting{{/B}}??Itwasauniqueeye-catchingsight:an attractivewomaninashinybullfighter’ssuitswordinhandfacingthesharp hornsofablack500-kilogrambeast.??Mostpeoplethoughtthe daysoffemalebullfightingwereoverinSpain.{{U}}?46 ?{{/U}}??ThefirstwomanfighterCristinaSanchezquitin 1999becauseofmalediscrimination歧视.ButVegaisdeterminedtobreakinto whatcouldbeSpain’smostresistantmalefield.{{U}}?47 ?{{/U}}??Spanishwomenhaveconqueredalmostallmale professions.{{U}}?48?{{/U}}Thebulldoesnotaskforyouridentity cardshesaidinaninterviewafewyearsago.Sheinsistedthatshebejudged forherskillsratherthanherfemaleness.??Vegabecameamatador 斗牛士in1997inthesouthwesterncityofCaceres.{{U}}?49?{{/U}}She enteredabullfightingschoolinMalagaatagenineandperformedherfirst majorbullfightatage14.ShehasfacedasmuchoppositionasSanchezdid.And thedifficultieshavemadehergrowintoaverystrongbullfighterher brotherJorgesays.??The1.68-metretallandsomewhatshyVega saysherloveofbullfightingdoesnotmakeheranylessofawoman.{{U}}? 50?{{/U}}A．SheintendstobecomeevenbetterthanSanchez was.B．Herfatherwasanaspiring有雄心壮志的bullfighter.C．Butmany bullfightingprofessionalscontinuetoinsistthatwomendonothavewhatit takestoperformthecountry’snationalshow.D．I’mawomanfromheadto toeandproudofitsheoncesaid.E．Shelookslikeamale bullfighter.F．Butrecently29-year-oldMariPazVegabecamethesecond womaninSpanishhistorytof!ghtagainstthoseheavyanimals.
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{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*HTML*}} ??Cancerisadiseaseinwhichcells multiplywithoutcontroldestroyhealthytissueandendangerlife.About100 kindsofcancerattackhumanbeings.Thediseaseisaleadingcauseofdeathin manycountries.IntheUnitedStatesandCanadaonlydiseasesoftheheartand bloodvesselskillmorepeople.Canceroccursinmostspeciesofanimalsandin manykindsofplantsaswellasinhumanbeings.??2.? ?Cancerstrikespeopleofallagesbutespeciallymiddle-agedpersonsand theelderly.Itoccursaboutequallyamongpeopleofbothsexes.Thediseasecan attackanypartofthebodyandmayspreadtootherparts.Howevertheparts mostoftenaffectedaretheskinthedigestiveorgansthelungsthemale prostateandthefemalebreasts.??3.??Scientistsdo notknowexactlywhycancerdevelops.Mostexpertsagreethatpeopledevelop cancermainlythroughrepeatedorprolongedcontactwithoneormore cancer-causingagentscalledcarcinogens.Theseagentsincludethetarsin tobaccosmokeavarietyofotherchemicalsandcertainkindsofradiation.In manycasescancercanbepreventedifaknownagentisavoidedoreliminated. Theeliminationofcigarettesmokingforexamplewouldpreventmostcasesof lungcancerandaboutathirdofallcasesofcancer.Scientistsalsobelieve thatsomepeoplemayinheritatendencytodevelopcancer.??4. ??Withoutpropertreatmentmostkindsofcancerarefatal.Onlya doctorcandiagnosecancer.Butinmanycasesadoctorisconsultedonlyafter thediseaseisfaradvanced.Apersonshouldthereforebealerttoanyphysical changethatmaybeasymptomofcancer.Earlydetectiongreatlyincreasesthe chancesofacure.??5.??Cancershowsnosymptomsin itsbeginningstages.Butsymptomsmayappearbeforethediseasespreads.The AmericanCancerSocietylistssevensuchwarningsignals.Theyare:1Change inbowelorbladderhabits;2Asorethatdoesnotheal;3Unusualbleeding ordischarge;4Thickeningorlumpinbreastorelsewhere;5Indigestionor difficultyinswallowing;6Obviouschangeinwartormole;7Naggingcough orhoarseness.Apersonwhohasanyofthesesymptomslongerthantwoweeks shouldconsultaphysicianpromptly.Canceroccursinmostspeciesofanimalsinmanykindsofplantsandin______.
{{*HTML*}} ??Cancerisadiseaseinwhichcells multiplywithoutcontroldestroyhealthytissueandendangerlife.About100 kindsofcancerattackhumanbeings.Thediseaseisaleadingcauseofdeathin manycountries.IntheUnitedStatesandCanadaonlydiseasesoftheheartand bloodvesselskillmorepeople.Canceroccursinmostspeciesofanimalsandin manykindsofplantsaswellasinhumanbeings.??2.? ?Cancerstrikespeopleofallagesbutespeciallymiddle-agedpersonsand theelderly.Itoccursaboutequallyamongpeopleofbothsexes.Thediseasecan attackanypartofthebodyandmayspreadtootherparts.Howevertheparts mostoftenaffectedaretheskinthedigestiveorgansthelungsthemale prostateandthefemalebreasts.??3.??Scientistsdo notknowexactlywhycancerdevelops.Mostexpertsagreethatpeopledevelop cancermainlythroughrepeatedorprolongedcontactwithoneormore cancer-causingagentscalledcarcinogens.Theseagentsincludethetarsin tobaccosmokeavarietyofotherchemicalsandcertainkindsofradiation.In manycasescancercanbepreventedifaknownagentisavoidedoreliminated. Theeliminationofcigarettesmokingforexamplewouldpreventmostcasesof lungcancerandaboutathirdofallcasesofcancer.Scientistsalsobelieve thatsomepeoplemayinheritatendencytodevelopcancer.??4. ??Withoutpropertreatmentmostkindsofcancerarefatal.Onlya doctorcandiagnosecancer.Butinmanycasesadoctorisconsultedonlyafter thediseaseisfaradvanced.Apersonshouldthereforebealerttoanyphysical changethatmaybeasymptomofcancer.Earlydetectiongreatlyincreasesthe chancesofacure.??5.??Cancershowsnosymptomsin itsbeginningstages.Butsymptomsmayappearbeforethediseasespreads.The AmericanCancerSocietylistssevensuchwarningsignals.Theyare:1Change inbowelorbladderhabits;2Asorethatdoesnotheal;3Unusualbleeding ordischarge;4Thickeningorlumpinbreastorelsewhere;5Indigestionor difficultyinswallowing;6Obviouschangeinwartormole;7Naggingcough orhoarseness.Apersonwhohasanyofthesesymptomslongerthantwoweeks shouldconsultaphysicianpromptly.Paragraph3.______.
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*HTML*}} ???Souped-up效力增强了的enzymesthat flushpoisonsoutofcellsmoreefficientlythantheirnatural counterparts对应的人或物couldalleviatesomeoftheseveresideeffectsof chemotherapyandsoimprovethechancesofcuringcancers.?? ?Manyanticancerdrugsattacktumorcellsbecausetheydividemorerapidly thanheathycells.Butsomevitalhealthycellsalsodividefasterthanormal andthesearedestroyedaswell.Themostvitalcellscaughtinthechemical cross-firearethosemadeinthebonemarrow骨髓.Undernormalcircumstances thesematureintoplatelets血小板whicharevitalforwound-healingandwhite bloodcellsthatfightinfections.Iflevelsofthesecellsfallpatients becomedangerouslyvulnerabletoinfectionandcansuffersuchsevereinternal bleedingthattreatmenthastobestopped.Survivingcancercellscanthen re-growandreducetheeffectivenessofthetherapy.?? ?BillFehlandhiscolleaguesattheUniversityofWisconsinMedicalSchool haveengineeredanenzymethatcouldmakebonemarrowcellsresistanttothe cancerdrugssohigherdosescanbegivenandsideeffectsreduced.Theideais totakehealthybonemarrowcellsfrompatientsbeforetheybeginchemotherapy thenequipthesecellswiththegenesthatmaketheenzymedrug-resistant.When returnedtothepatienttheimprovedbonemarrowcellscouldthenwithstand heavydosesofthedrugs.???Thenaturalversionofthe enzyme—calledglutathioneStransferase谷胱甘肽S转移酶—isproducedmainlyinthe liverandcatalyses催化thebreakdownofcompoundsthatmightotherwisedamage DNAincells.GSTalsoneutralizes中和thetoxicbreakdownproductsof anticancerdrugswhichmakesitsuitableforprotectingbonemarrowcells.But naturalGSTdoesnotworkefficientlyenoughtoavoidbeingswampedbyhigh dosesofdrugs.??GSTcatalysesareactionbetweenpotentially toxiccompoundsandglutathione—apeptide肽producedinalmostallcellsof thebody.TheGSTmoleculehasacavityoractivesitewherethetwo moleculesarebroughtcloseenoughtoreact.Thisneutralizesthetoxinwhich passesintothebloodtobeexcretedinthepatient’surine.?? Usingmachinesforsynthesizing结合使合成DNAFehlandhiscolleaguesmade thousandsofscrambledversionsofthepartsoftheGSTgenethatmakethe activesiteoftheenzyme.TheyinsertedthesescrambledgenesintoEscherichia coll.Byexposingthebacteriatoincreasingquantitiesoftheanticancerdrug mechlorethamine氮芥Fehlscreenedouttheonesmosttoleranttothedrug. ??Bythismethodwemadeenzymes30timesasefficientasthe naturalonesaysFehl.Inotherwordsittook30timesasmuchdrugtokill thebacteria.???Fehlhasalreadyexposedmicecarrying copiesofthedoctoredgenetoknowncarcinogens致癌物toseehowefficientthe geneisatmoppingupthetoxins.Themoreefficientitisthelessdamagethe toxinsdoandfewertumorsshouldappear.???Weanticipate asignificantreductioninthenumberofcancersinthegroupcarryingthe genesaysFehlwhoisstillanalyzingtheresults.Fehl’steamhasapplied forapatentcoveringthetechniqueandhopestodeveloptreatmentswith SystemixacompanybasedinPaloAltoCalifornia.?? ?BrianKettererwhoheadstheCancerResearchCampaign’smolecular toxicologygroupinLondonsaysFehl’sworkcouldbeimportant.Buthewarns thattheproposedstrategywouldnotprotectcellsliningthegutfrom chemotherapydrugs.TheenzymeengineeredbyFehl’steamissuperiortothenaturalenzymeinwithstandingHeavydosesofthedrugs.
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*HTML*}} ???Souped-up效力增强了的enzymesthat flushpoisonsoutofcellsmoreefficientlythantheirnatural counterparts对应的人或物couldalleviatesomeoftheseveresideeffectsof chemotherapyandsoimprovethechancesofcuringcancers.?? ?Manyanticancerdrugsattacktumorcellsbecausetheydividemorerapidly thanheathycells.Butsomevitalhealthycellsalsodividefasterthanormal andthesearedestroyedaswell.Themostvitalcellscaughtinthechemical cross-firearethosemadeinthebonemarrow骨髓.Undernormalcircumstances thesematureintoplatelets血小板whicharevitalforwound-healingandwhite bloodcellsthatfightinfections.Iflevelsofthesecellsfallpatients becomedangerouslyvulnerabletoinfectionandcansuffersuchsevereinternal bleedingthattreatmenthastobestopped.Survivingcancercellscanthen re-growandreducetheeffectivenessofthetherapy.?? ?BillFehlandhiscolleaguesattheUniversityofWisconsinMedicalSchool haveengineeredanenzymethatcouldmakebonemarrowcellsresistanttothe cancerdrugssohigherdosescanbegivenandsideeffectsreduced.Theideais totakehealthybonemarrowcellsfrompatientsbeforetheybeginchemotherapy thenequipthesecellswiththegenesthatmaketheenzymedrug-resistant.When returnedtothepatienttheimprovedbonemarrowcellscouldthenwithstand heavydosesofthedrugs.???Thenaturalversionofthe enzyme—calledglutathioneStransferase谷胱甘肽S转移酶—isproducedmainlyinthe liverandcatalyses催化thebreakdownofcompoundsthatmightotherwisedamage DNAincells.GSTalsoneutralizes中和thetoxicbreakdownproductsof anticancerdrugswhichmakesitsuitableforprotectingbonemarrowcells.But naturalGSTdoesnotworkefficientlyenoughtoavoidbeingswampedbyhigh dosesofdrugs.??GSTcatalysesareactionbetweenpotentially toxiccompoundsandglutathione—apeptide肽producedinalmostallcellsof thebody.TheGSTmoleculehasacavityoractivesitewherethetwo moleculesarebroughtcloseenoughtoreact.Thisneutralizesthetoxinwhich passesintothebloodtobeexcretedinthepatient’surine.?? Usingmachinesforsynthesizing结合使合成DNAFehlandhiscolleaguesmade thousandsofscrambledversionsofthepartsoftheGSTgenethatmakethe activesiteoftheenzyme.TheyinsertedthesescrambledgenesintoEscherichia coll.Byexposingthebacteriatoincreasingquantitiesoftheanticancerdrug mechlorethamine氮芥Fehlscreenedouttheonesmosttoleranttothedrug. ??Bythismethodwemadeenzymes30timesasefficientasthe naturalonesaysFehl.Inotherwordsittook30timesasmuchdrugtokill thebacteria.???Fehlhasalreadyexposedmicecarrying copiesofthedoctoredgenetoknowncarcinogens致癌物toseehowefficientthe geneisatmoppingupthetoxins.Themoreefficientitisthelessdamagethe toxinsdoandfewertumorsshouldappear.???Weanticipate asignificantreductioninthenumberofcancersinthegroupcarryingthe genesaysFehlwhoisstillanalyzingtheresults.Fehl’steamhasapplied forapatentcoveringthetechniqueandhopestodeveloptreatmentswith SystemixacompanybasedinPaloAltoCalifornia.?? ?BrianKettererwhoheadstheCancerResearchCampaign’smolecular toxicologygroupinLondonsaysFehl’sworkcouldbeimportant.Buthewarns thattheproposedstrategywouldnotprotectcellsliningthegutfrom chemotherapydrugs.Thepassagemainlydiscussesaboutthetoxicreactionofanticancerdrugs.
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??{{B}}IstheTieaNecessity?{{/B}}??Tiesorneckties havebeenasymbol’ofpolitenessandeleganceinBritainforcenturies.Butthe casualPrimeMinisterTonyBlairhasproblemswiththem.Reportssuggestthat eventhecivilservantsmaystopwearingties.Soarethefamouslyformal Britishreallygoingtoabandontheneckties???Maybe.Lastweek theUK’sCabinetSecretaryAndrewTurnbullopenlywelcomedatielessera.He hintedthatcivilservantswouldsoonbefreeofthecostliest12inchesof fabricthatmostmeneverbuyintheirlives.??InfactBlair showedthisattitudewhenhehadhisfirstgueststoacocktailparty.Manyof themwerecelebrities知名人士withouttieswhichwouldhavebeenunimaginable evenintherecentpast.??ForsomemoreconservativeBritishthe tieisamustforproperappearance.EarlierLaborleaderJimCallaghansaidhe wouldhavediedratherthanhavehischildrenseeninpublicwithoutatie.For peoplelikeCallaghanthetiewasasignofbeingcompleteofshowingrespect. Menweresupposedtowearatiewhengoingtochurchtoworkintheofficeto aparty-almosteverysocialoccasion.??Buttodaypeoplehave beguntoacceptacasualstyleevenforformaloccasions.??The originofthetieistricky.Itstartedassomethingcalledsimplyaband.The termcouldmeananythingaroundaman’sneck.Itappearedinfinerwaysinthe 1630s.Frenchmenshowedaloveofthisparticularfashionstatement.Their neckwear颈饰impressedCharlesIIthekingofEnglandwhowasexiled流放to Franceatthattime.WhenhereturnedtoEnglandin1660hebroughtthisnew fashionitemalongwithhim.??Itwasn’thoweveruntilthelate 18thcenturythatfancyyoungmenintroducedamorecolorfulflowingpieceof cloththateventuallybecameknownasthetie.Thenclubsmilitary institutionsandschoolsbegantousecoloredandpatternedtiestoindicatethe wearer’smembershipinthelate19上标thcentury.Afterthatthetiebecamea necessaryitemofclothingforBritishgentlemen.??Butnoweven gentlemenaregettingtiredofties.Anywaythedayfeelsabiteasierwhenyou wakeupwithouthavingtodecidewhichtiesuitsyouandyour mood.WhichofthefollowingisNOTasocialoccasion?
It'sbeyond{{U}}mortal{{/U}}powertobringadeadmanbacktolife.
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ??{{B}}FortyMayBetheNew30AsScientistsRedefine Age{{/B}}??Is40reallythenew30?Inmanywayspeopletodayact youngerthantheirparentsdidatthesameage.??Scientistshave definedanewageconceptandbelieveitcouldexplainwhypopulationsare agingbutatthesametimeseemtobegettingyounger.??Instead ofmeasuringagingbyhowlongpeoplehavelivedthescientistshavefactored inhowmanymoreyearspeoplecanprobablystilllookforwardto.? ?Usingthatmeasuretheaveragepersoncangetyoungerinthesensethat heorshecanhaveevenmoreyearstoliveastimegoesonsaidWarren SandersonoftheUniversityofNewYorkinStonyBrook.??Heand SergeiScherbovoftheViennaInstituteofDemography人口统计学attheAustrian 奥地利的AcademyofScienceshaveusedtheirmethodtoestimatehowthe proportionofelderlypeopleinGermanyJapanandtheUnitedStateswillchange inthefuture.??TheaverageGermanwas39.9yearsoldin2000 andcouldplantoliveforanother39.2yearsaccordingtoresearchreportedin thejournalNatureonWednesday.??Howeverby2050theaverage Germanwillbe51.9yearsoldandwillbeexpectedtoliveanother37.1years. Somiddleagein2050wouldoccurataround52yearsinsteadof40yearsasin 2000.??Aspeoplehavemoreandmoreyearstolivetheyhaveto savemoreandplanmoreandtheyeffectivelyarebehavingasiftheywere youngersaidSanderson.??FiveyearsagotheaverageAmerican was35.3yearsoldandcouldplanfor43.5moreyearsoflife.By2050the researchersestimateitwillincreaseto41.7yearsand45.8future years.??Alotofourskillsoureducationoursavingsandthe waywedealwithourhealthcaredependagreatdealonhowmanyyearswehave tolivesaidSanderson.??Thisdimensionofhowmanyyears peoplehavetolivehasbeencompletelyignoredinthediscussionofagingso far.By2050theaverageAmericanwillliveto
{{*HTML*}}??下面有3篇短文每篇短文后有5道题请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} ??????? ????{{B}}HappyTherapy诊疗{{/B}}??Norman CousinswasabusinessmanfromtheUnitedStateswhooftentraveledaroundthe worldonbusiness.Heenjoyedhisworkandtraveling.??Then afterreturningtotheUnitedStatesfromabusyandtiringtriptoRussiaMr. Cousinsgotsick.Becausehehadpushedhisbodytothelimitofitsstrengthon thetripachemicalchangebegantotakeplaceinsidehim.Thematerialbetween hisbonesbecameweak.??Inlessthanoneweekafterhisreturn hecouldnotstand.Everymovethathemadewaspainful.Hewasnotableto sleepatnight.??ThedoctorstoldMr.Cousinsthattheydidnot knowhowtocurehisproblemsandhemightnevergetovertheillness.Mr. Cousinshoweverrefusedtogiveuphope.??Mr.Cousinsthought thatunhappythoughtswerecausingbadchemicalchangesinhisbody.Hedidnot wanttotakemedicinetocurehimself.Insteadhefeltthathappythoughtsor laughtermightcurehisillness.??Hebegantoexperimenton himselfwhilestillinthehospitalbywatchingfunnyshowsontelevision.Mr. Cousinsquicklyfoundthattenminutesofreallaughterduringthedaygavehim twohoursofpain-freesleepatnight.??Decidingthatthedoctors couldnothelphimMr.Cousinsleftthehospitalandcheckedintoahotelroom wherehecouldcontinuehisexperimentswithlaughter.ForeightdaysMr. Cousinsrestedinthehotelroomwatchingfunnyshowsontelevisionreading funnybooksandsleepingwheneverhefelttired.Withinthreeweekshefelt wellenoughtotakeavacationtoPuertoRicowherehebeganrunningonthe beachforexercise.??AfterafewmonthsMr.Cousinsreturnedto work.Hehadlaughedhimselfbacktohealth.Mr.Cousinscuredhisownillness
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*HTML*}}??下面的短文有5处空白短文后有6个句子其中5个取自短文请根据短文内容将其分别放回原有位置以恢复文章原貌 ?????????? ???????{{B}}Female Bullfighting{{/B}}??Itwasauniqueeye-catchingsight:an attractivewomaninashinybullfighter’ssuitswordinhandfacingthesharp hornsofablack500-kilogrambeast.??Mostpeoplethoughtthe daysoffemalebullfightingwereoverinSpain.{{U}}?46 ?{{/U}}??ThefirstwomanfighterCristinaSanchezquitin 1999becauseofmalediscrimination歧视.ButVegaisdeterminedtobreakinto whatcouldbeSpain’smostresistantmalefield.{{U}}?47 ?{{/U}}??Spanishwomenhaveconqueredalmostallmale professions.{{U}}?48?{{/U}}Thebulldoesnotaskforyouridentity cardshesaidinaninterviewafewyearsago.Sheinsistedthatshebejudged forherskillsratherthanherfemaleness.??Vegabecameamatador 斗牛士in1997inthesouthwesterncityofCaceres.{{U}}?49?{{/U}}She enteredabullfightingschoolinMalagaatagenineandperformedherfirst majorbullfightatage14.ShehasfacedasmuchoppositionasSanchezdid.And thedifficultieshavemadehergrowintoaverystrongbullfighterher brotherJorgesays.??The1.68-metretallandsomewhatshyVega saysherloveofbullfightingdoesnotmakeheranylessofawoman.{{U}}? 50?{{/U}}A．SheintendstobecomeevenbetterthanSanchez was.B．Herfatherwasanaspiring有雄心壮志的bullfighter.C．Butmany bullfightingprofessionalscontinuetoinsistthatwomendonothavewhatit takestoperformthecountry’snationalshow.D．I’mawomanfromheadto toeandproudofitsheoncesaid.E．Shelookslikeamale bullfighter.F．Butrecently29-year-oldMariPazVegabecamethesecond womaninSpanishhistorytof!ghtagainstthoseheavyanimals.
{{*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 ??????? ?????????{{B}}StayingActive inOldAgeKeepsPeopleMobile{{/B}}??Peopleover70whoaren’t activearemorelikelytodevelopproblemswalkingorclimbingstairswithina fewyearsaccordingtoanewstudy.??Thesefindingssuggestthat it’sveryimportanttostay______51inoldagestudyauthorDr.Marjolein VissertoldReutersHealth.??Physicalactivityinoldageisas important______52takingyourmedications药物Vissernoted.Youdonot needtojoinanexpensivefancysportsclubwithhigh-tech高科技的equipment. Yourbodywillalready______53fromregularwalking.??Visser aDutch荷兰的scholarexplainedthat______54activehelpspreventpeoplefrom becomingbreathlessduringsimpleactivitiesincreasemusclemassandstrength andmaintainthebalancepeopleneedtowalkupstairsforinstance.? ?ToinvestigatehowimportantexerciseistoolderadultsVisser’steam interviewed3075menand______55betweentheagesof70and79allofwhom saidtheyhadnoproblemswalkingone-quarterofamileorclimbing______56. Theinvestigatorsfollowedthesubjectsfor4-1/2yearsnotingwhodeveloped problems______57andclimbingstairs.??Duringthestudy34 percentofmenand47______58ofwomensaidtheybegantostrugglewith walkingandclimbingstairs.People______59wereinactiveweretwiceaslikely toreporttheseproblemsaspeoplewhosaidtheygotregularexercise.? ?Peoplewhodidn’texercisebuthadactivelifestylesappearedtobeata somewhathigherriskofdeveloping______60walkingandclimbingstairs relativetopeoplewhoexercised______61.Stillleadinganactivelifestyle appearedtoprotectpeople______62problemsbetterthanbeinggenerally inactivetheresearchersreportintheJournaloftheAmericanGeriatrics 老年医学Society.??Amongpeoplewhowereinactive______63who walkedevenalittlebit-such?asbrisk轻快的walkingforalittleoveran hourperweek-wereatalower______64ofmobility可动性problems.? ?Ifyoudonotliketoexerciseoryoucannotexercise______65of serioushealthproblemsorfunctionallimitationsdotrytobeasactiveas possibleVisseradvised.
{{*HTML*}} ???Souped-up效力增强了的enzymesthat flushpoisonsoutofcellsmoreefficientlythantheirnatural counterparts对应的人或物couldalleviatesomeoftheseveresideeffectsof chemotherapyandsoimprovethechancesofcuringcancers.?? ?Manyanticancerdrugsattacktumorcellsbecausetheydividemorerapidly thanheathycells.Butsomevitalhealthycellsalsodividefasterthanormal andthesearedestroyedaswell.Themostvitalcellscaughtinthechemical cross-firearethosemadeinthebonemarrow骨髓.Undernormalcircumstances thesematureintoplatelets血小板whicharevitalforwound-healingandwhite bloodcellsthatfightinfections.Iflevelsofthesecellsfallpatients becomedangerouslyvulnerabletoinfectionandcansuffersuchsevereinternal bleedingthattreatmenthastobestopped.Survivingcancercellscanthen re-growandreducetheeffectivenessofthetherapy.?? ?BillFehlandhiscolleaguesattheUniversityofWisconsinMedicalSchool haveengineeredanenzymethatcouldmakebonemarrowcellsresistanttothe cancerdrugssohigherdosescanbegivenandsideeffectsreduced.Theideais totakehealthybonemarrowcellsfrompatientsbeforetheybeginchemotherapy thenequipthesecellswiththegenesthatmaketheenzymedrug-resistant.When returnedtothepatienttheimprovedbonemarrowcellscouldthenwithstand heavydosesofthedrugs.???Thenaturalversionofthe enzyme—calledglutathioneStransferase谷胱甘肽S转移酶—isproducedmainlyinthe liverandcatalyses催化thebreakdownofcompoundsthatmightotherwisedamage DNAincells.GSTalsoneutralizes中和thetoxicbreakdownproductsof anticancerdrugswhichmakesitsuitableforprotectingbonemarrowcells.But naturalGSTdoesnotworkefficientlyenoughtoavoidbeingswampedbyhigh dosesofdrugs.??GSTcatalysesareactionbetweenpotentially toxiccompoundsandglutathione—apeptide肽producedinalmostallcellsof thebody.TheGSTmoleculehasacavityoractivesitewherethetwo moleculesarebroughtcloseenoughtoreact.Thisneutralizesthetoxinwhich passesintothebloodtobeexcretedinthepatient’surine.?? Usingmachinesforsynthesizing结合使合成DNAFehlandhiscolleaguesmade thousandsofscrambledversionsofthepartsoftheGSTgenethatmakethe activesiteoftheenzyme.TheyinsertedthesescrambledgenesintoEscherichia coll.Byexposingthebacteriatoincreasingquantitiesoftheanticancerdrug mechlorethamine氮芥Fehlscreenedouttheonesmosttoleranttothedrug. ??Bythismethodwemadeenzymes30timesasefficientasthe naturalonesaysFehl.Inotherwordsittook30timesasmuchdrugtokill thebacteria.???Fehlhasalreadyexposedmicecarrying copiesofthedoctoredgenetoknowncarcinogens致癌物toseehowefficientthe geneisatmoppingupthetoxins.Themoreefficientitisthelessdamagethe toxinsdoandfewertumorsshouldappear.???Weanticipate asignificantreductioninthenumberofcancersinthegroupcarryingthe genesaysFehlwhoisstillanalyzingtheresults.Fehl’steamhasapplied forapatentcoveringthetechniqueandhopestodeveloptreatmentswith SystemixacompanybasedinPaloAltoCalifornia.?? ?BrianKettererwhoheadstheCancerResearchCampaign’smolecular toxicologygroupinLondonsaysFehl’sworkcouldbeimportant.Buthewarns thattheproposedstrategywouldnotprotectcellsliningthegutfrom chemotherapydrugs.Beingresistanttotheanticancerdrugsbonemarrowcellscangreatlyreducethesideeffects.
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