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{{*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}}Smoking{{/B}}??Since1939numerousstudieshave beenconductedtodeterminewhethersmokingisahealthhazard.Thetrendofthe evidencehasbeenconsistentandindicatesthatthereisaserioushealthrisk. Researchteamshaveconductedstudiesthatshowbeyondallreasonabledoubtthat tobaccosmokingisassociatedwithashortenedlifeexpectancy.? ?Cigarettesmokingisbelievedbymostresearchworkersinthisfieldto beanimportantfactorinthedevelopmentofcancerofthelungsandcancerof thethroatandisbelievedtoberelatedtocancerofsomeotherorgansofthe body.Malecigarettesmokershaveahigherdeathratefromheartdiseasethan non-smokingmales.Femalesmokersarethoughttobelessaffectedbecausethey donotbreatheinthesmokesodeeply.??Apartfromstatisticsit mightbehelpfultolookatwhatsmokingtobaccodoestothehumanbody.Smoke isamixtureofgasesvaporizedchemicalsminuteparticlesofashandother solids.Thereisalsonicotinewhichispowerfulpoisonandblacktar.As smokeisbreathedinallthosecomponentsformdepositsonthemembranesofthe lungs.Onepointofconcentrationiswheretheairtubeandbronchusdivides. Mostlungcancerbeginsatthispoint.??Filtersandlowtar tobaccoareclaimedtomakesmokingtosomeextentsaferbuttheycanonly slighfiyreducenoteliminatethehazards.Nicotineispoisonous.
{{*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从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ????????{{B}}SugarPowerforCell Phones{{/B}}??Usingenzymescommonlyfoundinlivingcellsanew typeoffuelcellproducessmallamountsofelectricityfromsugar.Ifthe technologyisabletosucceedinmassproductionyoumaysomedayshareyour sweetdrinkswithyourcellphone.??Infuelcellschemical reactionsgenerateelectricalcurrents.Theprocessusuallyreliesonprecious metalssuchasplatinum.Inlivingcellsenzymesperformasimilarjob breakingdownsugarstoobtainelectronsandproduceenergy.? ?Whenresearcherspreviouslyusedenzymesinfuelcellstheyhadtrouble keepingthemactivesaysShelleyD.MinteerofStLouisUniversity.Whereas biologicalcellscontinuallyproducefreshenzymesthere’snomechanisminfuel ceilstoreplaceenzymesastheyquicklydegrade.??Minteerand TamaraKlotzbachalsoofStLouisUniversityhavenowdevelopedpolymersthat wraparoundanenzymeandpreserveitinamicroscopicpocket.Wetailorthese pocketstoprovidetheidealmicroenvironmentfortheenzymeMinteersays.The polymerskeeptheenzymeactiveformonthsinsteadofdays.??In thenewfuelcelltinypolymerbagsofenzymeareembeddedinamembranethat coatsoneoftheelectrodes.Whenglucosefromasugaryliquidgetsintoa pockettheenzymeoxidizesitreleasingelectronsandprotons.Theelectrons crossthemembraneandenteruwirethroughWhichtheytraveltotheother electrodewheretheyreactwithoxygenintheatmospheretoproducewater.The flowofelectronsthroughthewireconstitutesanelectricalcurrentthatcan generatepower.??Sofarthenewfuelcellsdon’tproducemuch powerbutthefactthattheyworkatallisexcitingsaysPaulKenisa chemicalengineerattheUniversityofIllinoisatUrbana-Champaign.Just gettingittoworkKenissaysisamajoraccomplishment.? ?Sugar-eatingfuelcellscouldbeanefficientwaytomakeelectricity. Sugariseasytofind.Andthenewfuelcellsthatmnonitarebiodegradable sothetechnologywouldn’tharttheenvironment.Thescientistsarenowtrying tousedifferentenzymesthatwillgetmorepowerfromsugar.Theypredictthat popularproductsmaybeusingthenewtechnologyinaslittleas3 years.AccordingtoParagraph5electronsarereleased
{{*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 CellPhoneLetsYourSecret Out??Yourcellphoneholdssecretsaboutyou. Besidesthenamesand{{U}}?51?{{/U}}thatyou’veprogrammedintoit tracesofyourDNAlingeronthedeviceaccordingtoanewstudy.? ?DNAisgeneticmaterialthat{{U}}?52?{{/U}}ineverycell.Like yourfingerprintyourDNAisuniquetoyou{{U}}?53?{{/U}}youhavean identicaltwin.ScientiststodayroutinelyanalyzeDNAinbloodsalivaorhair left{{U}}?54?{{/U}}atthesceneofacrime.Theresultsoftenhelp detectivesidentify{{U}}?55?{{/U}}andtheirvictims.Yourcellphone canrevealmoreaboutyou{{U}}?56?{{/U}}youmightthink.? ?MethodJ.McFaddenascientistatMcMasterUniversityinHamilton Ontarioheardaboutacrimeinwhichthesuspectbledontoacellphoneand laterdroppedthe{{U}}?57?{{/U}}.Thismadeherwonderwhethertraces ofDNAlingeredoncellphones—evenwhennobloodwasinvolved.{{U}}?58 ?{{/U}}sheandcolleagueMargaretWallaceoftheCityUniversityofNewYork analyzedtheflip-openphonesof10volunteers.Theyusedswabstocollect {{U}}?59?{{/U}}tracesoftheusersfromtwopartsofthephone:the outsidewheretheuserholdsitandthe{{U}}?60?{{/U}}whichis placedattheuser’sear.??Thescientistsscrubbedthephones usingasolutionmademostly{{U}}?61?{{/U}}alcohol.Theaimof washingwastoremovealldetectabletracesofDNA.Theownersgottheirphones {{U}}?62?{{/U}}foranotherweek.Thentheresearcherscollectedthe phonesandrepeatedtheswabbingofeachphoneoncemore.??The scientistsdiscoveredDNAthat{{U}}?63?{{/U}}tothephone’sspeaker oneachofthephones.Bettersampleswerecollectedfromtheoutsideofeach phonebutthoseswabsalsopickedupDNAthatbelongedtootherpeoplewhohad apparentlyalsohandledthephone.{{U}}?64?{{/U}}DNAshowedupeven inswabsthatweretakenimmediatelyafterthephoneswerescrubbed.That suggeststhatwashingwon’tremovealltracesofevidencefromacriminal’s device.Socellphonescannowbeaddedtothe{{U}}?65?{{/U}}ofclues thatcanclinchacrime-sceneinvestigation.
{{*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从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ????????{{B}}SugarPowerforCell Phones{{/B}}??Usingenzymescommonlyfoundinlivingcellsanew typeoffuelcellproducessmallamountsofelectricityfromsugar.Ifthe technologyisabletosucceedinmassproductionyoumaysomedayshareyour sweetdrinkswithyourcellphone.??Infuelcellschemical reactionsgenerateelectricalcurrents.Theprocessusuallyreliesonprecious metalssuchasplatinum.Inlivingcellsenzymesperformasimilarjob breakingdownsugarstoobtainelectronsandproduceenergy.? ?Whenresearcherspreviouslyusedenzymesinfuelcellstheyhadtrouble keepingthemactivesaysShelleyD.MinteerofStLouisUniversity.Whereas biologicalcellscontinuallyproducefreshenzymesthere’snomechanisminfuel ceilstoreplaceenzymesastheyquicklydegrade.??Minteerand TamaraKlotzbachalsoofStLouisUniversityhavenowdevelopedpolymersthat wraparoundanenzymeandpreserveitinamicroscopicpocket.Wetailorthese pocketstoprovidetheidealmicroenvironmentfortheenzymeMinteersays.The polymerskeeptheenzymeactiveformonthsinsteadofdays.??In thenewfuelcelltinypolymerbagsofenzymeareembeddedinamembranethat coatsoneoftheelectrodes.Whenglucosefromasugaryliquidgetsintoa pockettheenzymeoxidizesitreleasingelectronsandprotons.Theelectrons crossthemembraneandenteruwirethroughWhichtheytraveltotheother electrodewheretheyreactwithoxygenintheatmospheretoproducewater.The flowofelectronsthroughthewireconstitutesanelectricalcurrentthatcan generatepower.??Sofarthenewfuelcellsdon’tproducemuch powerbutthefactthattheyworkatallisexcitingsaysPaulKenisa chemicalengineerattheUniversityofIllinoisatUrbana-Champaign.Just gettingittoworkKenissaysisamajoraccomplishment.? ?Sugar-eatingfuelcellscouldbeanefficientwaytomakeelectricity. Sugariseasytofind.Andthenewfuelcellsthatmnonitarebiodegradable sothetechnologywouldn’tharttheenvironment.Thescientistsarenowtrying tousedifferentenzymesthatwillgetmorepowerfromsugar.Theypredictthat popularproductsmaybeusingthenewtechnologyinaslittleas3 years.Accordingtothefirstparagraphwhencanweshareoursweetdrinkswithourcellphones?
{{*HTML*}}阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ???????{{B}}Reinventingthe Table{{/B}}??Anearthscientisthasrejiggedtheperiodictableto makechemistrysimplertoteachtostudents.??{{U}}?46 ?{{/U}}ButBruceRailsbackfromtheUniversityofGeorgiasaysheisthe firsttocreateatablethatbreakswithtraditionandshowstheionsofeach elementratherthanjusttheelementsthemselves.??Igottired ofbreakingmyarmstryingtoexplaintheperiodictabletoearthstudentshe sayscriss-crossinghishandsintheairandpointingtodifferentbitsofa traditionaltable.{{U}}?47?{{/U}}Buthehasaddedcontourlinesto chargedensityhelpingtoexplainwhichionsreactwithwhich.?? ?Geochemistsjustwantanintuitivesenseofwhat’sgoingonwiththe elementssaysAlbertGalyfromtheUniversityofCambridge.{{U}}?48 ?{{/U}}.??{{U}}?49?{{/U}}Heexplainsthatsulphur forexampleshowsupinthreedifferentspots--oneforsulphidewhichis foundinmineralsoneforsulphitrandoneforsulphatewhichisfoundinsea saltforinstance.??Hehasalsoincludedsymbolstoshowwhich ionsarenutrientsandwhicharecommoninsoilorwater.{{U}}?50 ?{{/U}}.A?Therehavebeenmanyattemptstoredesigntheperiodic tablesinceDmitriMendeleevdrewitupin1871.B?Railsbackhasstill orderedtheelementsaccordinglothenumberOfprotonstheyhave.C?I imaginethiswouldbegoodforundergraduates.D?Railsbackhaslisted someelementsmorethanonce.E?Andthesizeofelement’ssymbol reflectshowmuchofitisfoundintheEarth’scrust.F?The traditionalperiodictablewaswelldrawn.
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{{*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}}Smoking{{/B}}??Since1939numerousstudieshave beenconductedtodeterminewhethersmokingisahealthhazard.Thetrendofthe evidencehasbeenconsistentandindicatesthatthereisaserioushealthrisk. Researchteamshaveconductedstudiesthatshowbeyondallreasonabledoubtthat tobaccosmokingisassociatedwithashortenedlifeexpectancy.? ?Cigarettesmokingisbelievedbymostresearchworkersinthisfieldto beanimportantfactorinthedevelopmentofcancerofthelungsandcancerof thethroatandisbelievedtoberelatedtocancerofsomeotherorgansofthe body.Malecigarettesmokershaveahigherdeathratefromheartdiseasethan non-smokingmales.Femalesmokersarethoughttobelessaffectedbecausethey donotbreatheinthesmokesodeeply.??Apartfromstatisticsit mightbehelpfultolookatwhatsmokingtobaccodoestothehumanbody.Smoke isamixtureofgasesvaporizedchemicalsminuteparticlesofashandother solids.Thereisalsonicotinewhichispowerfulpoisonandblacktar.As smokeisbreathedinallthosecomponentsformdepositsonthemembranesofthe lungs.Onepointofconcentrationiswheretheairtubeandbronchusdivides. Mostlungcancerbeginsatthispoint.??Filtersandlowtar tobaccoareclaimedtomakesmokingtosomeextentsaferbuttheycanonly slighfiyreducenoteliminatethehazards.Thereisevidencethatsmokingisresponsibleforbreastcancer.
{{*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从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ????????{{B}}SugarPowerforCell Phones{{/B}}??Usingenzymescommonlyfoundinlivingcellsanew typeoffuelcellproducessmallamountsofelectricityfromsugar.Ifthe technologyisabletosucceedinmassproductionyoumaysomedayshareyour sweetdrinkswithyourcellphone.??Infuelcellschemical reactionsgenerateelectricalcurrents.Theprocessusuallyreliesonprecious metalssuchasplatinum.Inlivingcellsenzymesperformasimilarjob breakingdownsugarstoobtainelectronsandproduceenergy.? ?Whenresearcherspreviouslyusedenzymesinfuelcellstheyhadtrouble keepingthemactivesaysShelleyD.MinteerofStLouisUniversity.Whereas biologicalcellscontinuallyproducefreshenzymesthere’snomechanisminfuel ceilstoreplaceenzymesastheyquicklydegrade.??Minteerand TamaraKlotzbachalsoofStLouisUniversityhavenowdevelopedpolymersthat wraparoundanenzymeandpreserveitinamicroscopicpocket.Wetailorthese pocketstoprovidetheidealmicroenvironmentfortheenzymeMinteersays.The polymerskeeptheenzymeactiveformonthsinsteadofdays.??In thenewfuelcelltinypolymerbagsofenzymeareembeddedinamembranethat coatsoneoftheelectrodes.Whenglucosefromasugaryliquidgetsintoa pockettheenzymeoxidizesitreleasingelectronsandprotons.Theelectrons crossthemembraneandenteruwirethroughWhichtheytraveltotheother electrodewheretheyreactwithoxygenintheatmospheretoproducewater.The flowofelectronsthroughthewireconstitutesanelectricalcurrentthatcan generatepower.??Sofarthenewfuelcellsdon’tproducemuch powerbutthefactthattheyworkatallisexcitingsaysPaulKenisa chemicalengineerattheUniversityofIllinoisatUrbana-Champaign.Just gettingittoworkKenissaysisamajoraccomplishment.? ?Sugar-eatingfuelcellscouldbeanefficientwaytomakeelectricity. Sugariseasytofind.Andthenewfuelcellsthatmnonitarebiodegradable sothetechnologywouldn’tharttheenvironment.Thescientistsarenowtrying tousedifferentenzymesthatwillgetmorepowerfromsugar.Theypredictthat popularproductsmaybeusingthenewtechnologyinaslittleas3 years.AccordingtothelastparagraphwhatisNOTtrueofthenewfuelcells?
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{{*HTML*}}{{B}}第二篇{{/B}} ??????? ?????????{{B}}EiffelIsan Eyeful{{/B}}??Some300metersupneartheEiffelTower’s wind-whippedsummittheworldcomestoscribble.JapaneseBraziliansAmericans ?theygraffititheirnameslovesandpoliticsonthecoldiron-- transformingthemostFrenchofmonumentsintosymbolofaworldonthe move.??WithParislaidoutinminiaturebelowitseemsstrange thatvisitorswouldratherwastetimemarkingtheirpresencethanadmirethe view.Butthegraffitialsoraisesaquestion:Whynearly114yearsafterit wascompletedanddecadesafteritceasedtobetheworld’stalleststructure islaTourEiffelstillsopopular???Thereasonsareascomplex astheironworkthatgracesastructuresome90storieshigh.Butpartofthe answerisnodoubtitsagelessness.Regularlymaintaineditshouldneverrust away.Graffitiisregularlypaintedoverbutthetowerliveson.? ?EiffelrepresentsParisandParisisFrance.ItIsverysymbolicsays HuguesRicharda31-year-oldFrenchmanwhoholdstherecordforcyclingupto thetower’ssecondfloor--747stepsin19minutesand4secondswithout touchingthefloorwithhisfeet.It’sironladyitinspiresushe says.??Buttowhat?Afterallthetowerdoesn’thaveapurpose. Itceasedtobetheworld’stallestin1930whentheChryslerBuildingwentup inNewYork.Yestelevisionandradiosignalsarebeamedfromthetopand GustaveEiffelafreneticbuilderwhodiedonDecember27aged91usedits heightforconductingresearchintoweatheraerodynamicsandradio communication.??Butinessencethetowerinspiressimplybybeing there--ablankcanvasforvisitorstomakeofitwhattheywill.Tothe technicallymindedit’sanengineeringtriumph.Forloversit’s romantic.??Thetowerwilloutlastallofusandbyalongway saysIsabelleEsnouswhosecompanymanagesEiffel Tower.Whatseemsstrangetotheauthor?
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ?????????{{B}}EiffelIsan Eyeful{{/B}}??Some300metersupneartheEiffelTower’s wind-whippedsummittheworldcomestoscribble.JapaneseBraziliansAmericans ?theygraffititheirnameslovesandpoliticsonthecoldiron-- transformingthemostFrenchofmonumentsintosymbolofaworldonthe move.??WithParislaidoutinminiaturebelowitseemsstrange thatvisitorswouldratherwastetimemarkingtheirpresencethanadmirethe view.Butthegraffitialsoraisesaquestion:Whynearly114yearsafterit wascompletedanddecadesafteritceasedtobetheworld’stalleststructure islaTourEiffelstillsopopular???Thereasonsareascomplex astheironworkthatgracesastructuresome90storieshigh.Butpartofthe answerisnodoubtitsagelessness.Regularlymaintaineditshouldneverrust away.Graffitiisregularlypaintedoverbutthetowerliveson.? ?EiffelrepresentsParisandParisisFrance.ItIsverysymbolicsays HuguesRicharda31-year-oldFrenchmanwhoholdstherecordforcyclingupto thetower’ssecondfloor--747stepsin19minutesand4secondswithout touchingthefloorwithhisfeet.It’sironladyitinspiresushe says.??Buttowhat?Afterallthetowerdoesn’thaveapurpose. Itceasedtobetheworld’stallestin1930whentheChryslerBuildingwentup inNewYork.Yestelevisionandradiosignalsarebeamedfromthetopand GustaveEiffelafreneticbuilderwhodiedonDecember27aged91usedits heightforconductingresearchintoweatheraerodynamicsandradio communication.??Butinessencethetowerinspiressimplybybeing there--ablankcanvasforvisitorstomakeofitwhattheywill.Tothe technicallymindedit’sanengineeringtriumph.Forloversit’s romantic.??Thetowerwilloutlastallofusandbyalongway saysIsabelleEsnouswhosecompanymanagesEiffel Tower.WhatdidthebuilderusetheEiffelTowerfor?
{{*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}}IcyMicrobes{{/B}}??1?Inicethathassealedasalty Antarcticlakeformorethan2800yearsscientistshavefoundfrozenbacteria andalgaethatreturnedtolifeafterthawing.Theresearchmayhelpinthe searchforlifeonMarswhichisthoughttohavesubsurfacelakesof ice.??2?AresearchteamledbyPeterDoranofthe UniversityOfIllinoisatChicagodrilledthroughmorethan39feetoficeto collectsamplesofbacteriaandalgae.WhenDoran’steambroughtthembackand warmedthemupabittheysprangbacktolife.??3?Doran saidthemicrobeshavebeenage-datedat2800yearsoldbutevenolder microbesmaylivedeeperintheicesheetsealingthelakeandinthebriny waterbelowtheice.?Thatdeepericeandthewateritselfwillbe cautiouslysampledinalaterexpeditionthatwilltesttechniquesthatmayone daybeusedonMars.??4?CalledLakeVidathe 4.5-square-kilometerbodyisoneofaseriesoflakeslocatedintheMcMurdoDry ValleysofAntarcticasome2200kilometersduesouthofNewZealand.Thislake hasbeenknownsincethe1950sbutpeopleignoreditbecausetheythoughtit wasjustabigblockofice.Whileatthesiteforotherresearchinthe1990s Doranandhiscolleaguessentradarsignalsintotheclearicecoveringthelake andweresurprisedtofindthat62feetbelowtherewasapoolofliquidwater thatwasaboutseventimesmoresaltythanseawater.??5 ?Thatpromptedtheresearcherstoreturnin1996withequipmenttodrilla holedowntowithinafewfeetofthewaterlayer.Atthebottomofthishole researchersharvestedspecimensof.algaeandbacteria.??6 ?Theresearcherswillreturnin2004equippedwithinstrumentsthatare sterilized.Theywillthendrillthroughthefull62feetoficeandsamplesome ofthebrinywaterfromthelakeforanalysis.Thewaterspecimenwillbe culturedtoseeifitcontainslife.Specimensfromthewaterareexpectedtobe evenolderthanthelifeformsextractedfromtheicecovering.Whatthescientistswilldoin2004______.
{{*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 CellPhoneLetsYourSecret Out??Yourcellphoneholdssecretsaboutyou. Besidesthenamesand{{U}}?51?{{/U}}thatyou’veprogrammedintoit tracesofyourDNAlingeronthedeviceaccordingtoanewstudy.? ?DNAisgeneticmaterialthat{{U}}?52?{{/U}}ineverycell.Like yourfingerprintyourDNAisuniquetoyou{{U}}?53?{{/U}}youhavean identicaltwin.ScientiststodayroutinelyanalyzeDNAinbloodsalivaorhair left{{U}}?54?{{/U}}atthesceneofacrime.Theresultsoftenhelp detectivesidentify{{U}}?55?{{/U}}andtheirvictims.Yourcellphone canrevealmoreaboutyou{{U}}?56?{{/U}}youmightthink.? ?MethodJ.McFaddenascientistatMcMasterUniversityinHamilton Ontarioheardaboutacrimeinwhichthesuspectbledontoacellphoneand laterdroppedthe{{U}}?57?{{/U}}.Thismadeherwonderwhethertraces ofDNAlingeredoncellphones—evenwhennobloodwasinvolved.{{U}}?58 ?{{/U}}sheandcolleagueMargaretWallaceoftheCityUniversityofNewYork analyzedtheflip-openphonesof10volunteers.Theyusedswabstocollect {{U}}?59?{{/U}}tracesoftheusersfromtwopartsofthephone:the outsidewheretheuserholdsitandthe{{U}}?60?{{/U}}whichis placedattheuser’sear.??Thescientistsscrubbedthephones usingasolutionmademostly{{U}}?61?{{/U}}alcohol.Theaimof washingwastoremovealldetectabletracesofDNA.Theownersgottheirphones {{U}}?62?{{/U}}foranotherweek.Thentheresearcherscollectedthe phonesandrepeatedtheswabbingofeachphoneoncemore.??The scientistsdiscoveredDNAthat{{U}}?63?{{/U}}tothephone’sspeaker oneachofthephones.Bettersampleswerecollectedfromtheoutsideofeach phonebutthoseswabsalsopickedupDNAthatbelongedtootherpeoplewhohad apparentlyalsohandledthephone.{{U}}?64?{{/U}}DNAshowedupeven inswabsthatweretakenimmediatelyafterthephoneswerescrubbed.That suggeststhatwashingwon’tremovealltracesofevidencefromacriminal’s device.Socellphonescannowbeaddedtothe{{U}}?65?{{/U}}ofclues thatcanclinchacrime-sceneinvestigation.
{{*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 CellPhoneLetsYourSecret Out??Yourcellphoneholdssecretsaboutyou. Besidesthenamesand{{U}}?51?{{/U}}thatyou’veprogrammedintoit tracesofyourDNAlingeronthedeviceaccordingtoanewstudy.? ?DNAisgeneticmaterialthat{{U}}?52?{{/U}}ineverycell.Like yourfingerprintyourDNAisuniquetoyou{{U}}?53?{{/U}}youhavean identicaltwin.ScientiststodayroutinelyanalyzeDNAinbloodsalivaorhair left{{U}}?54?{{/U}}atthesceneofacrime.Theresultsoftenhelp detectivesidentify{{U}}?55?{{/U}}andtheirvictims.Yourcellphone canrevealmoreaboutyou{{U}}?56?{{/U}}youmightthink.? ?MethodJ.McFaddenascientistatMcMasterUniversityinHamilton Ontarioheardaboutacrimeinwhichthesuspectbledontoacellphoneand laterdroppedthe{{U}}?57?{{/U}}.Thismadeherwonderwhethertraces ofDNAlingeredoncellphones—evenwhennobloodwasinvolved.{{U}}?58 ?{{/U}}sheandcolleagueMargaretWallaceoftheCityUniversityofNewYork analyzedtheflip-openphonesof10volunteers.Theyusedswabstocollect {{U}}?59?{{/U}}tracesoftheusersfromtwopartsofthephone:the outsidewheretheuserholdsitandthe{{U}}?60?{{/U}}whichis placedattheuser’sear.??Thescientistsscrubbedthephones usingasolutionmademostly{{U}}?61?{{/U}}alcohol.Theaimof washingwastoremovealldetectabletracesofDNA.Theownersgottheirphones {{U}}?62?{{/U}}foranotherweek.Thentheresearcherscollectedthe phonesandrepeatedtheswabbingofeachphoneoncemore.??The scientistsdiscoveredDNAthat{{U}}?63?{{/U}}tothephone’sspeaker oneachofthephones.Bettersampleswerecollectedfromtheoutsideofeach phonebutthoseswabsalsopickedupDNAthatbelongedtootherpeoplewhohad apparentlyalsohandledthephone.{{U}}?64?{{/U}}DNAshowedupeven inswabsthatweretakenimmediatelyafterthephoneswerescrubbed.That suggeststhatwashingwon’tremovealltracesofevidencefromacriminal’s device.Socellphonescannowbeaddedtothe{{U}}?65?{{/U}}ofclues thatcanclinchacrime-sceneinvestigation.
{{*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 CellPhoneLetsYourSecret Out??Yourcellphoneholdssecretsaboutyou. Besidesthenamesand{{U}}?51?{{/U}}thatyou’veprogrammedintoit tracesofyourDNAlingeronthedeviceaccordingtoanewstudy.? ?DNAisgeneticmaterialthat{{U}}?52?{{/U}}ineverycell.Like yourfingerprintyourDNAisuniquetoyou{{U}}?53?{{/U}}youhavean identicaltwin.ScientiststodayroutinelyanalyzeDNAinbloodsalivaorhair left{{U}}?54?{{/U}}atthesceneofacrime.Theresultsoftenhelp detectivesidentify{{U}}?55?{{/U}}andtheirvictims.Yourcellphone canrevealmoreaboutyou{{U}}?56?{{/U}}youmightthink.? ?MethodJ.McFaddenascientistatMcMasterUniversityinHamilton Ontarioheardaboutacrimeinwhichthesuspectbledontoacellphoneand laterdroppedthe{{U}}?57?{{/U}}.Thismadeherwonderwhethertraces ofDNAlingeredoncellphones—evenwhennobloodwasinvolved.{{U}}?58 ?{{/U}}sheandcolleagueMargaretWallaceoftheCityUniversityofNewYork analyzedtheflip-openphonesof10volunteers.Theyusedswabstocollect {{U}}?59?{{/U}}tracesoftheusersfromtwopartsofthephone:the outsidewheretheuserholdsitandthe{{U}}?60?{{/U}}whichis placedattheuser’sear.??Thescientistsscrubbedthephones usingasolutionmademostly{{U}}?61?{{/U}}alcohol.Theaimof washingwastoremovealldetectabletracesofDNA.Theownersgottheirphones {{U}}?62?{{/U}}foranotherweek.Thentheresearcherscollectedthe phonesandrepeatedtheswabbingofeachphoneoncemore.??The scientistsdiscoveredDNAthat{{U}}?63?{{/U}}tothephone’sspeaker oneachofthephones.Bettersampleswerecollectedfromtheoutsideofeach phonebutthoseswabsalsopickedupDNAthatbelongedtootherpeoplewhohad apparentlyalsohandledthephone.{{U}}?64?{{/U}}DNAshowedupeven inswabsthatweretakenimmediatelyafterthephoneswerescrubbed.That suggeststhatwashingwon’tremovealltracesofevidencefromacriminal’s device.Socellphonescannowbeaddedtothe{{U}}?65?{{/U}}ofclues thatcanclinchacrime-sceneinvestigation.
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{{*HTML*}}{{B}}第三篇{{/B}} ??????? ?????????{{B}}EgyptFelledby Famine{{/B}}??EvenancientEgypt’smightypyramidbuilderswere powerlessinthefaceofthefaminethathelpedbringdowntheircivilisation around2180BC.NowevidencegleanedfrommuddepositedbytheRiverNile suggeststhatashiftinclimatethousandsofkilometrestothesouthwas ultimatelytoblame--andthesameorworsecouldhappentoday.? ?TheancientEgyptiansdependedontheNile’sannualfloodstoirrigate theircrops.ButanychangeinclimatethatpushedtheAfricanmonsoons southwardsoutofEthiopiawouldhavediminishedthesefloods.? ?DwindlingrainsintheEthiopianhighlandswouldhavemeantfewerplants tostablisethesoil.Whenraindidfallitwouldhavewashedlargemountsof soilintotheBlueNileandintoEgyptalongwithsedimentfromtheWhite Nile.??TheBlueNilemudhasadifferentisotopesignaturefrom thatoftheWhiteNile.Sobyanalysingisotopedifferencesinmuddepositedin theNileDeltaMichaelKromofLeedsUniversityworkedoutwhatproportionof sedimentcamefromeachbranchofthefiver.??Kromreasonsthat duringperiodsofdroughttheamountoftheBlueNilemudintheriverwouldbe relativelyhigh.Hefoundthatoneoftheseperiodsfrom450Oto4200years agoimmediatelypredatesthefalloftheEgypt’sOldKingdom.?? TheweakenedwaterswouldhavebeencatastrophicfortheEgyptians.Changes thataffectfoodsupplydon’thavetobeverylargetohavearippleeffectin societiessaysBillRyanoftheLamontDohertyEarthObservatoryinNew York.??Similareventstodaycouldbeevenmoredevastating saysteammemberDanielStanleyageoarchaeologistfromtheSmithsonian InstitutionsinWashingtonD.C..Anythinghumansdotoshifttheclimate beltswouldhaveanevenworseeffectalongtheNilesystemtodaybecausethe populationshaveincreaseddramatically.Whydoestheauthormentionpyramidbuilders?
{{*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}}IcyMicrobes{{/B}}??1?Inicethathassealedasalty Antarcticlakeformorethan2800yearsscientistshavefoundfrozenbacteria andalgaethatreturnedtolifeafterthawing.Theresearchmayhelpinthe searchforlifeonMarswhichisthoughttohavesubsurfacelakesof ice.??2?AresearchteamledbyPeterDoranofthe UniversityOfIllinoisatChicagodrilledthroughmorethan39feetoficeto collectsamplesofbacteriaandalgae.WhenDoran’steambroughtthembackand warmedthemupabittheysprangbacktolife.??3?Doran saidthemicrobeshavebeenage-datedat2800yearsoldbutevenolder microbesmaylivedeeperintheicesheetsealingthelakeandinthebriny waterbelowtheice.?Thatdeepericeandthewateritselfwillbe cautiouslysampledinalaterexpeditionthatwilltesttechniquesthatmayone daybeusedonMars.??4?CalledLakeVidathe 4.5-square-kilometerbodyisoneofaseriesoflakeslocatedintheMcMurdoDry ValleysofAntarcticasome2200kilometersduesouthofNewZealand.Thislake hasbeenknownsincethe1950sbutpeopleignoreditbecausetheythoughtit wasjustabigblockofice.Whileatthesiteforotherresearchinthe1990s Doranandhiscolleaguessentradarsignalsintotheclearicecoveringthelake andweresurprisedtofindthat62feetbelowtherewasapoolofliquidwater thatwasaboutseventimesmoresaltythanseawater.??5 ?Thatpromptedtheresearcherstoreturnin1996withequipmenttodrilla holedowntowithinafewfeetofthewaterlayer.Atthebottomofthishole researchersharvestedspecimensof.algaeandbacteria.??6 ?Theresearcherswillreturnin2004equippedwithinstrumentsthatare sterilized.Theywillthendrillthroughthefull62feetoficeandsamplesome ofthebrinywaterfromthelakeforanalysis.Thewaterspecimenwillbe culturedtoseeifitcontainslife.Specimensfromthewaterareexpectedtobe evenolderthanthelifeformsextractedfromtheicecovering.ScientistsignoredLakeVidabecausetheythoughtthatalakeofice______. A?isfoundtobeagreatdealhigherthanthatofseawater B?wasoflittlescientificvalue C?maybeolderthanthatcollectedbelow39feetofice D?mighthavecomefromMars E?istocollectsomebrinylakewaterforanalysis F?mayreturntolifesoonerthanmicrobesfrozeninthesurfaceice
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{{*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}}Smoking{{/B}}??Since1939numerousstudieshave beenconductedtodeterminewhethersmokingisahealthhazard.Thetrendofthe evidencehasbeenconsistentandindicatesthatthereisaserioushealthrisk. Researchteamshaveconductedstudiesthatshowbeyondallreasonabledoubtthat tobaccosmokingisassociatedwithashortenedlifeexpectancy.? ?Cigarettesmokingisbelievedbymostresearchworkersinthisfieldto beanimportantfactorinthedevelopmentofcancerofthelungsandcancerof thethroatandisbelievedtoberelatedtocancerofsomeotherorgansofthe body.Malecigarettesmokershaveahigherdeathratefromheartdiseasethan non-smokingmales.Femalesmokersarethoughttobelessaffectedbecausethey donotbreatheinthesmokesodeeply.??Apartfromstatisticsit mightbehelpfultolookatwhatsmokingtobaccodoestothehumanbody.Smoke isamixtureofgasesvaporizedchemicalsminuteparticlesofashandother solids.Thereisalsonicotinewhichispowerfulpoisonandblacktar.As smokeisbreathedinallthosecomponentsformdepositsonthemembranesofthe lungs.Onepointofconcentrationiswheretheairtubeandbronchusdivides. Mostlungcancerbeginsatthispoint.??Filtersandlowtar tobaccoareclaimedtomakesmokingtosomeextentsaferbuttheycanonly slighfiyreducenoteliminatethehazards.Smokingreducesone’slifeexpectancy.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????{{B}}OneGoodReasontoLetSmallpox Live{{/B}}??It’snowafairbetthatwewillneverseethetotal extinctionofthesmallpoxvirus.Theideawastocapthegloriousachievement of1980whensmallpoxwaseradicatedinthewildbydestroyingthekiller virusinthelasttwolabsthataresupposedtohaveit--oneintheUSandone inRussia.Ifsmallpoxhadtrulygonefromtheplanetwhatpointwastherein keepingthesereserves???{{U}}?51?{{/U}}realityof courseitwasnaiveto{{U}}?52?{{/U}}thateveryonewouldlet{{U}} ?53?{{/U}}ofsuchapotentpotentialweapon.Undoubtedlyseveral nationsstillhave{{U}}?54?{{/U}}vials.{{U}}?55?{{/U}}the lastofficialstocksoflivevirusbredmistrustoftheUSandRussia{{U}} ?56?{{/U}}noobviousgain.??NowAmericanresearchers have{{U}}?57?{{/U}}ananimalmodelofthehumandiseaseopening the{{U}}?58?{{/U}}fortestsonnewtreatmentsandvaccines.Soonce againthere’sagoodreasonto{{U}}?59?{{/U}}thevirus--justin{{U}} ?60?{{/U}}thediseaseputsinareappearance.??Howdo we{{U}}?61?{{/U}}withthemistrustoftheUSandRussia?{{U}}?62 ?{{/U}}.Keepthevirus{{U}}?63?{{/U}}internationalauspicesina well-guardedUNlaboratorythat’sopentoallcountries.TheUSwillobjectof coursejustasitrejectsamultilateralapproachtojustabouteverything.But itdoesn’t{{U}}?64?{{/U}}theideaiswrongffthevirus{{U}}?65 ?{{/U}}usefulthenlet’smakeittheservantofallhumanity--notjusta partofit.
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{{*HTML*}}阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ???????{{B}}Reinventingthe Table{{/B}}??Anearthscientisthasrejiggedtheperiodictableto makechemistrysimplertoteachtostudents.??{{U}}?46 ?{{/U}}ButBruceRailsbackfromtheUniversityofGeorgiasaysheisthe firsttocreateatablethatbreakswithtraditionandshowstheionsofeach elementratherthanjusttheelementsthemselves.??Igottired ofbreakingmyarmstryingtoexplaintheperiodictabletoearthstudentshe sayscriss-crossinghishandsintheairandpointingtodifferentbitsofa traditionaltable.{{U}}?47?{{/U}}Buthehasaddedcontourlinesto chargedensityhelpingtoexplainwhichionsreactwithwhich.?? ?Geochemistsjustwantanintuitivesenseofwhat’sgoingonwiththe elementssaysAlbertGalyfromtheUniversityofCambridge.{{U}}?48 ?{{/U}}.??{{U}}?49?{{/U}}Heexplainsthatsulphur forexampleshowsupinthreedifferentspots--oneforsulphidewhichis foundinmineralsoneforsulphitrandoneforsulphatewhichisfoundinsea saltforinstance.??Hehasalsoincludedsymbolstoshowwhich ionsarenutrientsandwhicharecommoninsoilorwater.{{U}}?50 ?{{/U}}.A?Therehavebeenmanyattemptstoredesigntheperiodic tablesinceDmitriMendeleevdrewitupin1871.B?Railsbackhasstill orderedtheelementsaccordinglothenumberOfprotonstheyhave.C?I imaginethiswouldbegoodforundergraduates.D?Railsbackhaslisted someelementsmorethanonce.E?Andthesizeofelement’ssymbol reflectshowmuchofitisfoundintheEarth’scrust.F?The traditionalperiodictablewaswelldrawn.
{{*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}}IcyMicrobes{{/B}}??1?Inicethathassealedasalty Antarcticlakeformorethan2800yearsscientistshavefoundfrozenbacteria andalgaethatreturnedtolifeafterthawing.Theresearchmayhelpinthe searchforlifeonMarswhichisthoughttohavesubsurfacelakesof ice.??2?AresearchteamledbyPeterDoranofthe UniversityOfIllinoisatChicagodrilledthroughmorethan39feetoficeto collectsamplesofbacteriaandalgae.WhenDoran’steambroughtthembackand warmedthemupabittheysprangbacktolife.??3?Doran saidthemicrobeshavebeenage-datedat2800yearsoldbutevenolder microbesmaylivedeeperintheicesheetsealingthelakeandinthebriny waterbelowtheice.?Thatdeepericeandthewateritselfwillbe cautiouslysampledinalaterexpeditionthatwilltesttechniquesthatmayone daybeusedonMars.??4?CalledLakeVidathe 4.5-square-kilometerbodyisoneofaseriesoflakeslocatedintheMcMurdoDry ValleysofAntarcticasome2200kilometersduesouthofNewZealand.Thislake hasbeenknownsincethe1950sbutpeopleignoreditbecausetheythoughtit wasjustabigblockofice.Whileatthesiteforotherresearchinthe1990s Doranandhiscolleaguessentradarsignalsintotheclearicecoveringthelake andweresurprisedtofindthat62feetbelowtherewasapoolofliquidwater thatwasaboutseventimesmoresaltythanseawater.??5 ?Thatpromptedtheresearcherstoreturnin1996withequipmenttodrilla holedowntowithinafewfeetofthewaterlayer.Atthebottomofthishole researchersharvestedspecimensof.algaeandbacteria.??6 ?Theresearcherswillreturnin2004equippedwithinstrumentsthatare sterilized.Theywillthendrillthroughthefull62feetoficeandsamplesome ofthebrinywaterfromthelakeforanalysis.Thewaterspecimenwillbe culturedtoseeifitcontainslife.Specimensfromthewaterareexpectedtobe evenolderthanthelifeformsextractedfromtheicecovering.Paragraph2______ A?SignificanceofTestingTechniquesforSamplingMicrobesintheDeepleeSheet B?SpecialFeaturesofLakeVida C?LaterExpeditiononMars D?2004RevisitPlannedforCollectingLakeWaterSpecimens E?AntarcticFrozenLifeSampledandRevived F?AccidentalDiscoveryoflee-sealedLakeWaterinAntarctica
{{*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}}IcyMicrobes{{/B}}??1?Inicethathassealedasalty Antarcticlakeformorethan2800yearsscientistshavefoundfrozenbacteria andalgaethatreturnedtolifeafterthawing.Theresearchmayhelpinthe searchforlifeonMarswhichisthoughttohavesubsurfacelakesof ice.??2?AresearchteamledbyPeterDoranofthe UniversityOfIllinoisatChicagodrilledthroughmorethan39feetoficeto collectsamplesofbacteriaandalgae.WhenDoran’steambroughtthembackand warmedthemupabittheysprangbacktolife.??3?Doran saidthemicrobeshavebeenage-datedat2800yearsoldbutevenolder microbesmaylivedeeperintheicesheetsealingthelakeandinthebriny waterbelowtheice.?Thatdeepericeandthewateritselfwillbe cautiouslysampledinalaterexpeditionthatwilltesttechniquesthatmayone daybeusedonMars.??4?CalledLakeVidathe 4.5-square-kilometerbodyisoneofaseriesoflakeslocatedintheMcMurdoDry ValleysofAntarcticasome2200kilometersduesouthofNewZealand.Thislake hasbeenknownsincethe1950sbutpeopleignoreditbecausetheythoughtit wasjustabigblockofice.Whileatthesiteforotherresearchinthe1990s Doranandhiscolleaguessentradarsignalsintotheclearicecoveringthelake andweresurprisedtofindthat62feetbelowtherewasapoolofliquidwater thatwasaboutseventimesmoresaltythanseawater.??5 ?Thatpromptedtheresearcherstoreturnin1996withequipmenttodrilla holedowntowithinafewfeetofthewaterlayer.Atthebottomofthishole researchersharvestedspecimensof.algaeandbacteria.??6 ?Theresearcherswillreturnin2004equippedwithinstrumentsthatare sterilized.Theywillthendrillthroughthefull62feetoficeandsamplesome ofthebrinywaterfromthelakeforanalysis.Thewaterspecimenwillbe culturedtoseeifitcontainslife.Specimensfromthewaterareexpectedtobe evenolderthanthelifeformsextractedfromtheicecovering.Paragraph4______
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{{*HTML*}}{{B}}第三篇{{/B}} ??????? ?????????{{B}}EgyptFelledby Famine{{/B}}??EvenancientEgypt’smightypyramidbuilderswere powerlessinthefaceofthefaminethathelpedbringdowntheircivilisation around2180BC.NowevidencegleanedfrommuddepositedbytheRiverNile suggeststhatashiftinclimatethousandsofkilometrestothesouthwas ultimatelytoblame--andthesameorworsecouldhappentoday.? ?TheancientEgyptiansdependedontheNile’sannualfloodstoirrigate theircrops.ButanychangeinclimatethatpushedtheAfricanmonsoons southwardsoutofEthiopiawouldhavediminishedthesefloods.? ?DwindlingrainsintheEthiopianhighlandswouldhavemeantfewerplants tostablisethesoil.Whenraindidfallitwouldhavewashedlargemountsof soilintotheBlueNileandintoEgyptalongwithsedimentfromtheWhite Nile.??TheBlueNilemudhasadifferentisotopesignaturefrom thatoftheWhiteNile.Sobyanalysingisotopedifferencesinmuddepositedin theNileDeltaMichaelKromofLeedsUniversityworkedoutwhatproportionof sedimentcamefromeachbranchofthefiver.??Kromreasonsthat duringperiodsofdroughttheamountoftheBlueNilemudintheriverwouldbe relativelyhigh.Hefoundthatoneoftheseperiodsfrom450Oto4200years agoimmediatelypredatesthefalloftheEgypt’sOldKingdom.?? TheweakenedwaterswouldhavebeencatastrophicfortheEgyptians.Changes thataffectfoodsupplydon’thavetobeverylargetohavearippleeffectin societiessaysBillRyanoftheLamontDohertyEarthObservatoryinNew York.??Similareventstodaycouldbeevenmoredevastating saysteammemberDanielStanleyageoarchaeologistfromtheSmithsonian InstitutionsinWashingtonD.C..Anythinghumansdotoshifttheclimate beltswouldhaveanevenworseeffectalongtheNilesystemtodaybecausethe populationshaveincreaseddramatically.Whichofthefollowingstatementsistrue?
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ?????????{{B}}EgyptFelledby Famine{{/B}}??EvenancientEgypt’smightypyramidbuilderswere powerlessinthefaceofthefaminethathelpedbringdowntheircivilisation around2180BC.NowevidencegleanedfrommuddepositedbytheRiverNile suggeststhatashiftinclimatethousandsofkilometrestothesouthwas ultimatelytoblame--andthesameorworsecouldhappentoday.? ?TheancientEgyptiansdependedontheNile’sannualfloodstoirrigate theircrops.ButanychangeinclimatethatpushedtheAfricanmonsoons southwardsoutofEthiopiawouldhavediminishedthesefloods.? ?DwindlingrainsintheEthiopianhighlandswouldhavemeantfewerplants tostablisethesoil.Whenraindidfallitwouldhavewashedlargemountsof soilintotheBlueNileandintoEgyptalongwithsedimentfromtheWhite Nile.??TheBlueNilemudhasadifferentisotopesignaturefrom thatoftheWhiteNile.Sobyanalysingisotopedifferencesinmuddepositedin theNileDeltaMichaelKromofLeedsUniversityworkedoutwhatproportionof sedimentcamefromeachbranchofthefiver.??Kromreasonsthat duringperiodsofdroughttheamountoftheBlueNilemudintheriverwouldbe relativelyhigh.Hefoundthatoneoftheseperiodsfrom450Oto4200years agoimmediatelypredatesthefalloftheEgypt’sOldKingdom.?? TheweakenedwaterswouldhavebeencatastrophicfortheEgyptians.Changes thataffectfoodsupplydon’thavetobeverylargetohavearippleeffectin societiessaysBillRyanoftheLamontDohertyEarthObservatoryinNew York.??Similareventstodaycouldbeevenmoredevastating saysteammemberDanielStanleyageoarchaeologistfromtheSmithsonian InstitutionsinWashingtonD.C..Anythinghumansdotoshifttheclimate beltswouldhaveanevenworseeffectalongtheNilesystemtodaybecausethe populationshaveincreaseddramatically.Theworddevastatinginthelastparagraphcouldbebestreplacedby
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