首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
? 阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子作出判断。如果该句提供的是正确信息，请选择A项：如果该句提供的是错误信息，清选择B项；如果该句的信息文章中没有提及，请选择C项...
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
请根据以下资料说明使用5个规范句子描述全部所给信息内容要求1标题It’sharmfultoCivil
任务型阅读阅读短文按照要求完成各题Whatwilltheweatherbelike?Somepeop
阅读表达阅读下面短文根据短文后的要求答题TheCleanYourPlateCampaignwasse
听短文根据短文内容完成下面的表格短文读三遍注chemistry化学lab实验室
下面四幅图片描述的是李明和爷爷从养鸟到放鸟的一段经历请根据图片所提供的信息以第三人称用英语写一篇短文
请根据下面所示内容用英语写一篇短文比较高中学生减负前后的有关情况1.短文须包括所有图表内容可以适当增
任务型阅读阅读下面的短文完成相关任务IntheCharlesF.JohnsonElementaryS
请根据给定资料用简洁的短语概括微公益的主要特征要求以①②③④的表达形式分点列出语言简洁不要展开也不要
任务型阅读阅读下面的短文完成相关任务IntheCharlesE.JohnsonElementaryS
阅读表达阅读下面短文根据其内容完成后面各项任务IntheCharlesE.JohnsonElemen
请先阅读下面短文掌握其大意然后根据短文内容从下面方框内的七个选项中选择五个还原到文中使短文意思通顺结
基础写作请根据以下表格内容使用5个规范的英语句子介绍学校学生的课外活动情况作文必须全部所给的信息5个
书面表达共15分下面四幅图描述的是星期天上午在中山公园里发生的事请根据图片所提供的信息用英语为你校的
请根据给定资料用简洁的短语概括微公益的主要特征要求以①②③④的表达形式分点列出语言简洁不要展开也不
短文填空请认真阅读下面短文并根据各题所给首字母的提示写出一个合适的英语单词完整正确的形式使短文通顺N
书面表达满分25分下面四幅图片描述的是李明和爷爷从养鸟到放鸟的一段经历请根据图片所提供的信息以第三人
阅读使人明智阅读使人充实某英文报为了了解中学生课外阅读情况向广大中学生做调查请根据下面图表信息写一篇
10分A下面是一篇未写完的短文请认真阅读为短文写一个30～40词的结尾使短文连贯完整. Summ
阅读下面短文回答问题与北风太阳两方为谁的能量大相互争论不休他们决定谁能使得行人脱下衣服谁就胜利了北风
某英文报社举办以ILikeReading为主题的征文活动你打算投稿请根据以下要点写一篇短文【写作内容
热门试题
更多
{{*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*}}
Thepolicemancautionedusabouttheicyroadsaftertheheavysnowfalllastnight.
{{*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.
IcyroadsandpoorvisibilityarefamiliarhazardsintheMidwest.
DefectiveGenesandHumanHealth Eachofuscarriesabouthalfadozendefective有缺点的genes.Weremainblissfully快乐地unawareofthisfactunlessweoroneofourcloserelativesareamongstthemanymillionswhosufferfromageneticdisease.Aboutoneintenpeoplehasorwilldevelopatsomelaterstageaninherited遗传的geneticdisorderandapproximately2800specificconditionsareknowntobecausedbydefectsmutationsinjustoneofthepatient’’sgenes.Somesinglegenedisordersarequitecommon-—cystic胞状的fibrosis纤维化isfoundinoneoutofevery2500babiesbornintheWesternWorld—andintotaldiseasesthatcanbetracedtosinglegenedefectsaccountforabout5%ofalladmissionstochildren’’shospitals. Mostofusdonotsufferanyharmfuleffectsfromourdefectivegenesbecausewecarrytwocopiesofnearlyallgenesonederivedfromourmotherandtheotherfromourfather.Theonlyexceptionstothisrulearethegenesfoundonthemalesexchromosomes染色体MaleshaveoneXandoneYchromosometheformerfromthemotherandthelatterfromthefathersoeachcellhasonlyonecopyofthegenesonthesechromosomes.Inthemajorityofcasesonenormalgeneissufficienttoavoidallthesymptomsofdisease.Ifthepotentiallyharmfulgeneisrecessive后退的thenitsnormalcounterpart配对的willcarryoutallthetasksassignedtoboth.Onlyifweinheritfromourparentstwocopiesofthesamerecessivegenewilladiseasedevelop. Ontheotherhandifthegeneisdominant显性的italonecanproducethediseaseevenifitscounterpartisnormal.Clearlyonlythechildrenofaparentwiththediseasecanbeaffectedandthenaverageonlyhalfthechildrenwillbeaffected.Huntington’’schorea舞蹈病aseverediseaseofthenervoussystemwhichbecomesapparentonlyinadulthoodisanexampleofadominantgeneticdisease. FinallytherearetheXchromosome-linkedgeneticdiseases.Asmaleshaveonlyonecopyofthegenesfromthischromosometherearenoothersavailabletofulfillthedefectivegene’’sfunction.ExamplesofsuchdiseasesareDuchennemusculardystrophy营养不良andperhapsmostwellknownofallhemophilia血友病. QueenVictoriawasacarrierofthedefectivegeneresponsibleforhemophiliaandthroughheritwastransmittedtotheroyalfamiliesofRussiaSpainandPrussia.MinorcutsandbruiseswhichwoulddolittleharmtomostpeoplecanprovefataltohemophiliacswholacktheproteinsFactorsVIIIandIV凝血因子VIII和IVinvolvedintheclotting血凝结ofbloodwhicharecodedforbythedefectivegenes.Sadlybeforetheseproteinsweremadeavailablethroughgeneticengineeringhemophiliacsweretreatedwithproteinsisolatedfromhumanblood.Someofthisbloodwascontaminated污损withtheAIDSvirusandhasresultedintragic悲惨的consequencesformanyhemophiliacs.Useofgeneticallyengineeredproteinsintherapeuticapplicationsratherthanbloodproductswillavoidtheseproblemsinthefuture. Notalldefectivegenesnecessarilyproducedetrimental有害的effectssincetheenvironmentinwhichthegeneoperatesisalsoofimportance.Aclassicexampleofageneticdiseasehavingabeneficialeffectonsurvivalisillustratedbytherelationshipbetweensickle-cell镶形血球anemia贫血症andmalaria疟病.Onlyindividualshavingtwocopiesofthesickle-cellgeneandonenormalgeneareunaffectedandmoreimportantlyareabletoresistinfection传染bymalarialparasites寄生虫.Theclearadvantageinthiscaseofhavingonedefectivegeneexplainswhythisgeneiscommoninpopulationsinthoseareasoftheworldwheremalariaisendemic特有的. WhichofthefollowingstatementsongenesanddiseasesisNOTTRUE?
DefectiveGenesandHumanHealth Eachofuscarriesabouthalfadozendefective有缺点的genes.Weremainblissfully快乐地unawareofthisfactunlessweoroneofourcloserelativesareamongstthemanymillionswhosufferfromageneticdisease.Aboutoneintenpeoplehasorwilldevelopatsomelaterstageaninherited遗传的geneticdisorderandapproximately2800specificconditionsareknowntobecausedbydefectsmutationsinjustoneofthepatient’’sgenes.Somesinglegenedisordersarequitecommon-—cystic胞状的fibrosis纤维化isfoundinoneoutofevery2500babiesbornintheWesternWorld—andintotaldiseasesthatcanbetracedtosinglegenedefectsaccountforabout5%ofalladmissionstochildren’’shospitals. Mostofusdonotsufferanyharmfuleffectsfromourdefectivegenesbecausewecarrytwocopiesofnearlyallgenesonederivedfromourmotherandtheotherfromourfather.Theonlyexceptionstothisrulearethegenesfoundonthemalesexchromosomes染色体MaleshaveoneXandoneYchromosometheformerfromthemotherandthelatterfromthefathersoeachcellhasonlyonecopyofthegenesonthesechromosomes.Inthemajorityofcasesonenormalgeneissufficienttoavoidallthesymptomsofdisease.Ifthepotentiallyharmfulgeneisrecessive后退的thenitsnormalcounterpart配对的willcarryoutallthetasksassignedtoboth.Onlyifweinheritfromourparentstwocopiesofthesamerecessivegenewilladiseasedevelop. Ontheotherhandifthegeneisdominant显性的italonecanproducethediseaseevenifitscounterpartisnormal.Clearlyonlythechildrenofaparentwiththediseasecanbeaffectedandthenaverageonlyhalfthechildrenwillbeaffected.Huntington’’schorea舞蹈病aseverediseaseofthenervoussystemwhichbecomesapparentonlyinadulthoodisanexampleofadominantgeneticdisease. FinallytherearetheXchromosome-linkedgeneticdiseases.Asmaleshaveonlyonecopyofthegenesfromthischromosometherearenoothersavailabletofulfillthedefectivegene’’sfunction.ExamplesofsuchdiseasesareDuchennemusculardystrophy营养不良andperhapsmostwellknownofallhemophilia血友病. QueenVictoriawasacarrierofthedefectivegeneresponsibleforhemophiliaandthroughheritwastransmittedtotheroyalfamiliesofRussiaSpainandPrussia.MinorcutsandbruiseswhichwoulddolittleharmtomostpeoplecanprovefataltohemophiliacswholacktheproteinsFactorsVIIIandIV凝血因子VIII和IVinvolvedintheclotting血凝结ofbloodwhicharecodedforbythedefectivegenes.Sadlybeforetheseproteinsweremadeavailablethroughgeneticengineeringhemophiliacsweretreatedwithproteinsisolatedfromhumanblood.Someofthisbloodwascontaminated污损withtheAIDSvirusandhasresultedintragic悲惨的consequencesformanyhemophiliacs.Useofgeneticallyengineeredproteinsintherapeuticapplicationsratherthanbloodproductswillavoidtheseproblemsinthefuture. Notalldefectivegenesnecessarilyproducedetrimental有害的effectssincetheenvironmentinwhichthegeneoperatesisalsoofimportance.Aclassicexampleofageneticdiseasehavingabeneficialeffectonsurvivalisillustratedbytherelationshipbetweensickle-cell镶形血球anemia贫血症andmalaria疟病.Onlyindividualshavingtwocopiesofthesickle-cellgeneandonenormalgeneareunaffectedandmoreimportantlyareabletoresistinfection传染bymalarialparasites寄生虫.Theclearadvantageinthiscaseofhavingonedefectivegeneexplainswhythisgeneiscommoninpopulationsinthoseareasoftheworldwheremalariaisendemic特有的. thediseasepara.7refersto______.
{{*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.
{{*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.AccordingtoKromEgypt’sOldKingdomfell
{{*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.
MostAdultsinU.S.HaveLowRiskofHeartDisease Morethan80percentofUSadultshavealessthan10percentriskofdevelopingheartdiseaseinthenext10yearsaccordingtoareportintheJournaloftheAmericanCollegeofCardiology.Just3percenthaveariskthatexceeds20percent. IhopethatthesenumberswillgivephysiciansresearchershealthpolicyanalystsandothersabetterideaofhowcoronaryheartdiseaseisdistributedintheUSpopulationleadauthorDr.EarlS.FordfromtheCentersforDiseaseControlandPreventioninAtlantasaidinastatement. Thefindingsarebasedonanalysisofdatafrom13769subjectsbetween20and79yearsofagewhoparticipatedintheThirdNationalHealthandNutritionExaminationSurveyfrom1988to1994. Overall82percentofadultshadariskoflessthan10percent15percenthadariskthatfellbetween10to20percentand3percenthadariskabove20percent. Theproportionofsubjectsinthehighestriskgroupincreasedwithadvancingageandmenweremorelikelythanwomentobeinthisgroup.Bycontrastraceorethnicityhadlittleeffectonriskdistributions. Althoughthereportsuggeststhatmostadultshavealow10-yearriskofheartdiseasealargeproportionhaveahighorimmediateriskDr.DanielS.BermanfromCedars-SinaiMedicalCenterinLosAngelesandDr.NathanD.WongfromtheUniversityofCaliforniaatIrvinenoteinarelatededitorial. Aggressivetreatmentmeasuresandpublichealthstrategiesareneededtoshifttheoverallpopulationriskdownwardtheyadd. Elderlypeoplehaveahigherriskofheartdiseasethanyoungerpeople.
MostAdultsinU.S.HaveLowRiskofHeartDisease Morethan80percentofUSadultshavealessthan10percentriskofdevelopingheartdiseaseinthenext10yearsaccordingtoareportintheJournaloftheAmericanCollegeofCardiology.Just3percenthaveariskthatexceeds20percent. IhopethatthesenumberswillgivephysiciansresearchershealthpolicyanalystsandothersabetterideaofhowcoronaryheartdiseaseisdistributedintheUSpopulationleadauthorDr.EarlS.FordfromtheCentersforDiseaseControlandPreventioninAtlantasaidinastatement. Thefindingsarebasedonanalysisofdatafrom13769subjectsbetween20and79yearsofagewhoparticipatedintheThirdNationalHealthandNutritionExaminationSurveyfrom1988to1994. Overall82percentofadultshadariskoflessthan10percent15percenthadariskthatfellbetween10to20percentand3percenthadariskabove20percent. Theproportionofsubjectsinthehighestriskgroupincreasedwithadvancingageandmenweremorelikelythanwomentobeinthisgroup.Bycontrastraceorethnicityhadlittleeffectonriskdistributions. Althoughthereportsuggeststhatmostadultshavealow10-yearriskofheartdiseasealargeproportionhaveahighorimmediateriskDr.DanielS.BermanfromCedars-SinaiMedicalCenterinLosAngelesandDr.NathanD.WongfromtheUniversityofCaliforniaatIrvinenoteinarelatededitorial. Aggressivetreatmentmeasuresandpublichealthstrategiesareneededtoshifttheoverallpopulationriskdownwardtheyadd. Only3percentofUSadultshaveamorethan10percent10-yearriskofheartdisease.
DefectiveGenesandHumanHealth Eachofuscarriesabouthalfadozendefective有缺点的genes.Weremainblissfully快乐地unawareofthisfactunlessweoroneofourcloserelativesareamongstthemanymillionswhosufferfromageneticdisease.Aboutoneintenpeoplehasorwilldevelopatsomelaterstageaninherited遗传的geneticdisorderandapproximately2800specificconditionsareknowntobecausedbydefectsmutationsinjustoneofthepatient’’sgenes.Somesinglegenedisordersarequitecommon-—cystic胞状的fibrosis纤维化isfoundinoneoutofevery2500babiesbornintheWesternWorld—andintotaldiseasesthatcanbetracedtosinglegenedefectsaccountforabout5%ofalladmissionstochildren’’shospitals. Mostofusdonotsufferanyharmfuleffectsfromourdefectivegenesbecausewecarrytwocopiesofnearlyallgenesonederivedfromourmotherandtheotherfromourfather.Theonlyexceptionstothisrulearethegenesfoundonthemalesexchromosomes染色体MaleshaveoneXandoneYchromosometheformerfromthemotherandthelatterfromthefathersoeachcellhasonlyonecopyofthegenesonthesechromosomes.Inthemajorityofcasesonenormalgeneissufficienttoavoidallthesymptomsofdisease.Ifthepotentiallyharmfulgeneisrecessive后退的thenitsnormalcounterpart配对的willcarryoutallthetasksassignedtoboth.Onlyifweinheritfromourparentstwocopiesofthesamerecessivegenewilladiseasedevelop. Ontheotherhandifthegeneisdominant显性的italonecanproducethediseaseevenifitscounterpartisnormal.Clearlyonlythechildrenofaparentwiththediseasecanbeaffectedandthenaverageonlyhalfthechildrenwillbeaffected.Huntington’’schorea舞蹈病aseverediseaseofthenervoussystemwhichbecomesapparentonlyinadulthoodisanexampleofadominantgeneticdisease. FinallytherearetheXchromosome-linkedgeneticdiseases.Asmaleshaveonlyonecopyofthegenesfromthischromosometherearenoothersavailabletofulfillthedefectivegene’’sfunction.ExamplesofsuchdiseasesareDuchennemusculardystrophy营养不良andperhapsmostwellknownofallhemophilia血友病. QueenVictoriawasacarrierofthedefectivegeneresponsibleforhemophiliaandthroughheritwastransmittedtotheroyalfamiliesofRussiaSpainandPrussia.MinorcutsandbruiseswhichwoulddolittleharmtomostpeoplecanprovefataltohemophiliacswholacktheproteinsFactorsVIIIandIV凝血因子VIII和IVinvolvedintheclotting血凝结ofbloodwhicharecodedforbythedefectivegenes.Sadlybeforetheseproteinsweremadeavailablethroughgeneticengineeringhemophiliacsweretreatedwithproteinsisolatedfromhumanblood.Someofthisbloodwascontaminated污损withtheAIDSvirusandhasresultedintragic悲惨的consequencesformanyhemophiliacs.Useofgeneticallyengineeredproteinsintherapeuticapplicationsratherthanbloodproductswillavoidtheseproblemsinthefuture. Notalldefectivegenesnecessarilyproducedetrimental有害的effectssincetheenvironmentinwhichthegeneoperatesisalsoofimportance.Aclassicexampleofageneticdiseasehavingabeneficialeffectonsurvivalisillustratedbytherelationshipbetweensickle-cell镶形血球anemia贫血症andmalaria疟病.Onlyindividualshavingtwocopiesofthesickle-cellgeneandonenormalgeneareunaffectedandmoreimportantlyareabletoresistinfection传染bymalarialparasites寄生虫.Theclearadvantageinthiscaseofhavingonedefectivegeneexplainswhythisgeneiscommoninpopulationsinthoseareasoftheworldwheremalariaisendemic特有的. Wecaninferfrompara.4that______.
{{*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.WhichofthefollowingisnearestinmeaningtoTheEiffelTowerislikeablankcanvasforvisitorstomakeofitwhattheywill?
{{*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.
{{*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.
{{*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.
InTom’’seyestherestaurantatthecornerofthestreetisaverysmartone.
MostAdultsinU.S.HaveLowRiskofHeartDisease Morethan80percentofUSadultshavealessthan10percentriskofdevelopingheartdiseaseinthenext10yearsaccordingtoareportintheJournaloftheAmericanCollegeofCardiology.Just3percenthaveariskthatexceeds20percent. IhopethatthesenumberswillgivephysiciansresearchershealthpolicyanalystsandothersabetterideaofhowcoronaryheartdiseaseisdistributedintheUSpopulationleadauthorDr.EarlS.FordfromtheCentersforDiseaseControlandPreventioninAtlantasaidinastatement. Thefindingsarebasedonanalysisofdatafrom13769subjectsbetween20and79yearsofagewhoparticipatedintheThirdNationalHealthandNutritionExaminationSurveyfrom1988to1994. Overall82percentofadultshadariskoflessthan10percent15percenthadariskthatfellbetween10to20percentand3percenthadariskabove20percent. Theproportionofsubjectsinthehighestriskgroupincreasedwithadvancingageandmenweremorelikelythanwomentobeinthisgroup.Bycontrastraceorethnicityhadlittleeffectonriskdistributions. Althoughthereportsuggeststhatmostadultshavealow10-yearriskofheartdiseasealargeproportionhaveahighorimmediateriskDr.DanielS.BermanfromCedars-SinaiMedicalCenterinLosAngelesandDr.NathanD.WongfromtheUniversityofCaliforniaatIrvinenoteinarelatededitorial. Aggressivetreatmentmeasuresandpublichealthstrategiesareneededtoshifttheoverallpopulationriskdownwardtheyadd. Therewasagreaterproportionofmenthanwomeninthesurvey.
LargeareasofAlaskanlandremaindesolateduetoharshclimate.
Youwillfindthatthecommunityhasexperiencedgreatchangessinceyoucameherelast.
AIDS AIDSisAcquiredImmuneDeficiencySyndrome.Thehumanimmunodeficiencyvirus人类免疫缺损病毒calledHIVisbelievedtocauseAIDS.Thereisnocure.Peoplewhogetthediseasewilldie.AIDSitselfdoesnotkill.Howeveritattacksanddestroysthebody’’sdefensesystemthatfightsagainstinfection.Whenthishappensapersonhaslittleabilitytofightoffmanyotherdiseasesincludingpneumonia肺炎cancerandtuberculosis结核病. AnewstudysaysthenumberofwomenintheUnitedStateswithAIDShasincreasedsharply.ThestudysaysAIDSisincreasingfasteramongwomenthanamongmen.EighteenpercentofAIDSpatientsarewomen.Thisisalmost3timestherate10yearsago.MostwomengettheAIDSvirusfromhavingsexualrelationswithmen.Pregnantwomenwiththediseasecanpassittotheirbabies.TheeffectofAIDSinAmericaisgreatestinlargecities.AIDSistheleadingcauseofdeathamongallpeoplein79cities.Itistheleadingcauseofdeathamongwomenin15cities.TheseincludeNewYorkCityandMiamiFlorida. DoctorsintheUnitedStatesfirstnotedAIDS14yearsagoinhomosexual同性恋的meninNewYorkandCalifornia.IntheUnitedStatesAIDSspreadfirstamonghomosexualmen.Thenitappearedinpeoplewhosharedneedlestoputillegaldrugsintotheirblood.Italsoappearedinpeoplewhohadreceivedinfectedbloodproductsathospitals.TheAIDSvirusisspreadthroughtheexchangeofinfectedbloodorbodyfluidsreleasedduringsexualactivity.Itisalsospreadbyhavingsexualrelationswithsomeonewhohasthevirus.Anditisspreadbysharingdrugneedlesthathaveinfectedbloodonthem. AIDShasaffectedseveralfamousAmericanathletes.TwoyearsagoformertennisplayerArthurAshediedofthedisease.AtaboutthesametimeformerbasketballplayerMagicJohnsonannouncedthathehastheAIDSvirus.ThemostrecentathletetobeaffectedisGregoryLouganis.LouganiswonanumberofgoldmedalsinOlympicdivingcompetition.HeannouncedontelevisionthathehasAIDS.PresidentClintonmetwithLouganisandpraisedhimfordiscussinghissickness.Mr.Clintonsaiditisimportanttoeducatethepublic. ActivistshavesucceededineducatingAmericansaboutAIDSandthepeoplewhohaveit.TheyalsohavebeenurgingthefederalgovernmenttoincreaseeffortstofindacureforAIDS.ScientistsfirstidentifiedthevirusthatisbelievedtocauseAIDSin1983.Manyofthemthenthoughttheycouldproduceananti-AIDSvaccine痘苗.Suchamedicinecouldbegiventopeopletoprotectagainstthedisease.HoweverscientistsatAmericangovernmentagenciesuniversitiesanddrugcompanieshavefailedtoproduceananti-AIDSvaccine.Buttheyarecontinuingefforttofindbettertreatmentsforacure. WhyaresomemuseumsclosedinayearlyeventcalledDaywithoutArt?
{{*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.
AIDS AIDSisAcquiredImmuneDeficiencySyndrome.Thehumanimmunodeficiencyvirus人类免疫缺损病毒calledHIVisbelievedtocauseAIDS.Thereisnocure.Peoplewhogetthediseasewilldie.AIDSitselfdoesnotkill.Howeveritattacksanddestroysthebody’’sdefensesystemthatfightsagainstinfection.Whenthishappensapersonhaslittleabilitytofightoffmanyotherdiseasesincludingpneumonia肺炎cancerandtuberculosis结核病. AnewstudysaysthenumberofwomenintheUnitedStateswithAIDShasincreasedsharply.ThestudysaysAIDSisincreasingfasteramongwomenthanamongmen.EighteenpercentofAIDSpatientsarewomen.Thisisalmost3timestherate10yearsago.MostwomengettheAIDSvirusfromhavingsexualrelationswithmen.Pregnantwomenwiththediseasecanpassittotheirbabies.TheeffectofAIDSinAmericaisgreatestinlargecities.AIDSistheleadingcauseofdeathamongallpeoplein79cities.Itistheleadingcauseofdeathamongwomenin15cities.TheseincludeNewYorkCityandMiamiFlorida. DoctorsintheUnitedStatesfirstnotedAIDS14yearsagoinhomosexual同性恋的meninNewYorkandCalifornia.IntheUnitedStatesAIDSspreadfirstamonghomosexualmen.Thenitappearedinpeoplewhosharedneedlestoputillegaldrugsintotheirblood.Italsoappearedinpeoplewhohadreceivedinfectedbloodproductsathospitals.TheAIDSvirusisspreadthroughtheexchangeofinfectedbloodorbodyfluidsreleasedduringsexualactivity.Itisalsospreadbyhavingsexualrelationswithsomeonewhohasthevirus.Anditisspreadbysharingdrugneedlesthathaveinfectedbloodonthem. AIDShasaffectedseveralfamousAmericanathletes.TwoyearsagoformertennisplayerArthurAshediedofthedisease.AtaboutthesametimeformerbasketballplayerMagicJohnsonannouncedthathehastheAIDSvirus.ThemostrecentathletetobeaffectedisGregoryLouganis.LouganiswonanumberofgoldmedalsinOlympicdivingcompetition.HeannouncedontelevisionthathehasAIDS.PresidentClintonmetwithLouganisandpraisedhimfordiscussinghissickness.Mr.Clintonsaiditisimportanttoeducatethepublic. ActivistshavesucceededineducatingAmericansaboutAIDSandthepeoplewhohaveit.TheyalsohavebeenurgingthefederalgovernmenttoincreaseeffortstofindacureforAIDS.ScientistsfirstidentifiedthevirusthatisbelievedtocauseAIDSin1983.Manyofthemthenthoughttheycouldproduceananti-AIDSvaccine痘苗.Suchamedicinecouldbegiventopeopletoprotectagainstthedisease.HoweverscientistsatAmericangovernmentagenciesuniversitiesanddrugcompanieshavefailedtoproduceananti-AIDSvaccine.Buttheyarecontinuingefforttofindbettertreatmentsforacure. Whatisnotlikelytohappen?
Eachleaderhadaseriouslookashesignedthepeacetreaty.
Someinsectsrelyonthetinyhairsscatteredovertheirbodiestosensesoundwaves.
{{*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.Whichofthefollowingfactorswasultimatelyresponsibleforthefallofthecivilisation-ofancientEgypt?
{{*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.
{{*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.WhichstatementisNOTtrueofHuguesRichard?
Ittookmeawholehourtosolvetheproblem.
热门题库
更多
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
外贸综合业务
外贸外语
湘公网安备 43130202000226号