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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}}??????? ??????????RedMeat LinkstoHigherRiskofBreastCancer{{/B}}??Exerciseandkeepinga healthyweightaretwothingsthatdoctorssaymighthelpwomenlowertheirrisk ofbreastcancer.??Mothersmayreducetheirriskifthey breastfeedforatleastfourmonths.Forolderwomenhormonereplacement therapycanlowertheriskofsomeotherdiseases.Butithasbeenfoundto increasetheriskofbreastcancer.Sowomenshouldconsidertheirchoices carefully.Thesamemaybesaidfordiet.??Newfindingsshowthat youngerwomenwhoeatalotofredmeathavehigherratesofbreastcancers calledhormone-receptorpositive.Thegrowthisfedbythelevelsofestrogenor anotherhormoneprogesteroneinthebody.??Researchersat BrighamWomen’sHospitalinBostonMassachusettsreportedthefindingsaspart ofahealthstudyofnurses.Theresearchersfollowedthehealthofmorethan 90000womenfrom1991to2003.Thosewhoatethemostredmeatatemorethan oneandone-halfservingsaday.Aservingwasdefinedasroughly84grams. Thosewhoatetheleastredmeatatelessthanthreeservingsaweek.Thisis whatthestudyfoundaboutbreastcancersthatwerehormonereceptor-positive: Thewomenwhoatethemostredmeatwerealmosttwotimesaslikelytogetthem asthewomenwhoatetheleastofit.??EunyoungChothelead authorofthereportsaysmoreresearchisneededtoknowthereasonforthe link.Butinthepastresearchershavesuggestedthatthreethingsmayplaya part.Oneisthewaymeatiscookedorprocessed.Anotheristheuseofgrowth hormonesincows.Andthethirdisthekindofironinredmeat.Thestudy appearsintheArchivesofInternalMedicine.??Andnowwehave moretotellyouaboutoursubject--resveratrol.Wediscussedastudyinthe UnitedStatesthatfoundthatlargeamountsofthisplantcompoundhelpedfat micelivelonger.Themicewerefedmuchmoreresveratrolthanpeoplecouldget fromredwineoneofthefoodsthatcontainsit.??Now scientistsinFrancesayresveratrolalsoimprovesmuscleperformance--again atleastinmice.Theywereabletoruntwotimesasfarinlaboratorytreadmill tests4asmicenormallycould.ThestudyattheInstituteofGeneticsand MolecularandCellularBiologysappearedinthejournal Cell.Resveratrolisthefourthfactorrecentlyfoundthatcausesabreastcancertodevelop.
{{*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}}??????? ??????????Diseases ofAgriculturalPlants{{/B}}??Plantslikeanimalsaresubjectto diseasesofvariouskinds.Ithasbeenestimatedthatsome30000different diseasesattackoureconomicplants;fortyareknowntoattackcomandaboutas manyattackwheat.Theresultsofuncheckedplantdiseasearealltooobviousin countrieswhichhavemarginalfoodsupplies.Theproblemwillsoonbemore widespreadasthepopulationoftheworldincreasesatitsfrighteningrate. Evenincountrieswhicharenowamplyfedbytheiragriculturalproductsthere couldsoonbecriticalfoodshortages.?Itiseasytoimaginethe consequencesofsomedisastrousattackononeofthemajorcrops;theresulting faminescouldkillmillionsofpeopleandtheresultinghardshiponother millionscouldcausepoliticalupheavalsdisastroustotheorderofthe world.??Someplantshaverelativeimmunitytoagreatmany diseaseswhileothershaveasusceptibilitytothem.Thetoleranceofa particularplantchangesasthegrowingconditionschange.Ablightmaybebuta localinfectioneasilycontrolled;ontheotherhanditcanattackparticular plantsinawholeregionornation.Anexampleistheblightwhichkilled virtuallyeverychestnuttreeinNorthAmerica.Anotheristhefamouspotato blightinIrelandinthelastcentury.Asaresultofthatitwasestimated thatonemillionpeoplediedofstarvationandrelatedailments.? ?Plantpathologistshavemaderemarkablestridesinidentifyingthe pathogensofthevariousdiseases.Bacteriamayinvadeaplantthroughan infestationofinsectparasitescarryingthepathogen.Aplantcanalsobe inoculatedbyman.Otherdiseasesmightbecausedbyfunguswhichattacksthe plantintheformofamoldorsmutorrust.Frequentlysuchaprimary infection8willweakentheplantsothatasecondaryinfectionmayresultfrom9 itslackoftolerance.Thesymptomsshownmaycauseanerrorindiagnosisso thattreatmentmaybedirectedtowardbacteriawhichcouldbetheresultofa susceptibilitycausedbyaprimaryvirus infection.Whichofthefollowingstatementsisnottrue?
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
Thecuriouslookfromthestrangersaroundhermadeherfeel{{U}}uneasy{{/U}}.
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{{*HTML*}}? ?下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} {{B}}??????? ??????????Diseases ofAgriculturalPlants{{/B}}??Plantslikeanimalsaresubjectto diseasesofvariouskinds.Ithasbeenestimatedthatsome30000different diseasesattackoureconomicplants;fortyareknowntoattackcomandaboutas manyattackwheat.Theresultsofuncheckedplantdiseasearealltooobviousin countrieswhichhavemarginalfoodsupplies.Theproblemwillsoonbemore widespreadasthepopulationoftheworldincreasesatitsfrighteningrate. Evenincountrieswhicharenowamplyfedbytheiragriculturalproductsthere couldsoonbecriticalfoodshortages.?Itiseasytoimaginethe consequencesofsomedisastrousattackononeofthemajorcrops;theresulting faminescouldkillmillionsofpeopleandtheresultinghardshiponother millionscouldcausepoliticalupheavalsdisastroustotheorderofthe world.??Someplantshaverelativeimmunitytoagreatmany diseaseswhileothershaveasusceptibilitytothem.Thetoleranceofa particularplantchangesasthegrowingconditionschange.Ablightmaybebuta localinfectioneasilycontrolled;ontheotherhanditcanattackparticular plantsinawholeregionornation.Anexampleistheblightwhichkilled virtuallyeverychestnuttreeinNorthAmerica.Anotheristhefamouspotato blightinIrelandinthelastcentury.Asaresultofthatitwasestimated thatonemillionpeoplediedofstarvationandrelatedailments.? ?Plantpathologistshavemaderemarkablestridesinidentifyingthe pathogensofthevariousdiseases.Bacteriamayinvadeaplantthroughan infestationofinsectparasitescarryingthepathogen.Aplantcanalsobe inoculatedbyman.Otherdiseasesmightbecausedbyfunguswhichattacksthe plantintheformofamoldorsmutorrust.Frequentlysuchaprimary infection8willweakentheplantsothatasecondaryinfectionmayresultfrom9 itslackoftolerance.Thesymptomsshownmaycauseanerrorindiagnosisso thattreatmentmaybedirectedtowardbacteriawhichcouldbetheresultofa susceptibilitycausedbyaprimaryvirus infection.Howmanydiseasesareknowntoattackwheat?
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}??????? ??????????? ??????Obesity{{/B}}??Obesity referstothemedicalconditioncharacterizedbystorageofexcessbodyfat.The humanbodynaturallystoresfattissueundertheskinandaroundorgansand joints.Fatiscriticalforgoodhealthbecauseitisasourceofenergywhen thebodylackstheenergynecessarytosustainlifeprocessesanditprovides insulationandprotectionforinternalorgans.Buttoomuchfatinthebodyis associatedwithavarietyofhealthproblems.??Mostphysicians usethebodymassindexBMItodeterminedesirableweights.BMIiscalculated asweightdividedbyheightandpeoplewithaBMIof27oraboveareconsidered obese.??Weight-heighttablessuchasthosepublishedbythe MetropolitanLifeInsuranceCompanyarealsousedasgeneralmeasuresof desirableweightranges3.Thesetablesassignarangeofweightsfora particularheight.Forexampleamanof1.8mhasadesirablerangeof66to83 kgwithanaverageof75kg.Awomanwhois1.6mhasadesirablerangebetween 53and70kgwithanaverageof62kg.??TheBMIand weight-heighttablesonlyprovideroughestimatesofdesirableweightsand scientistsrecognizethatmanyotherfactorsbesidesheightaffectweight. Weightalonemaynotbeanindicatoroffatasinthecaseofabody-builder whomayhaveahighBMIbecauseofahighpercentageofmuscletissuewhich weighsmorethanfat.Likewiseapersonwithasedentarylifestylemaybe withinadesirableweightrangebuthaveexcessfattissue.? ?Obesityincreasestheriskofdevelopingdisease.Accordingtosome estimatesalmost70percentofheartdiseasecasesarelinkedtoexcessbody fatandobesepeoplearemorethantwiceaslikelytodevelophighblood pressure.Obesewomenareatnearlytwicetheriskfordevelopingbreastcancer andallobesepeoplehaveanestimated42percenthigherchanceofdeveloping coloncancer.Theriskofmedicalcomplicationsparticularlyheartdisease increaseswhenbodyfatisdistributedaroundthewaistespeciallyinthe abdomen.Thistypeofupperbodyfatdistributionismorecommoninmenthanin women.??Thesocialandpsychologicalproblemsexperiencedby obesepeoplearealsoformidable.Stereotypesaboutfatpeopleareoften translatedintodiscriminatorypracticesineducationemploymentandsocial relationships.Theconsequencesofbeingobeseinaworldwherepeoplehad betterbethinareespeciallysevereforwomenwhoseappearancesareoften judgedagainstanidealofexaggeratedslimness. Ifwesaythatfatiscriticalforgoodhealthwemeanthat
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}??????? ??????????? ????SilentandDeadly{{/B}}??Transient ischemicattacksTIAsorministrokesresultfromtemporaryinterruptionsof bloodflowtothebrain.Unlikefullstrokestheypresentsymptomslasting anywherefromafewsecondsto24hours.Rarelydotheycausepermanent neurologicaldamagebuttheyareoftenprecursorsofamajorstroke.? ?OurmessageisquiteclearsaysDr.RobertAdamsprofessorof neurologyat-theMedicalCollegeofGeorgiainAugust.TIAswhilelesssevere thanstrokesintheshorttermarequitedangerousandneedaquickdiagnosis andtreatmentaswellasappropriatefollow-uptopreventfuture injury.??Unfortunatelyministrokesaregreatlyunderdiagnosed. AstudyconductedfortheNationalStrokeAssociationindicatesthat2.5%ofall adultsaged18orolderabout4.9millionpeopleintheU.S.haveexperienced aconfirmedTIA4.Anadditional1.2millionAmericansovertheageof45the studyshowedhavemostlikelysufferedaministrokewithoutrealizingit.These findingssuggestthatifthepublicknewhowtospotthesymptomsofstroke especiallyministrokesandsoughtpromptmedicaltreatmentthousandsoflives couldbesavedandmajordisabilitycouldbeavoided.??The problemisthatthesymptomsofaministrokeareoftensubtleandpassing. Nonethelesstherearesignsyoucanlookoutfor:??▲Numbnessor weaknessinthefacearmorlegespeciallyononesideofthebody.? ?▲Troubleseeinginoneorbotheyes.??▲Confusionand difficultyspeakingorunderstanding.??▲Difficultywalking dizzinessorlossofcoordination.??▲Severeheadachewithno knowncause.??Alongwiththesesymptomsresearchershave identifiedsomekeyindicatorsthatincreaseyourchancesofhavingafull-blown strokeafteraTIA:ifyou’reover60haveexperiencedsymptomslastinglonger than10minutesfeelweakandhaveahistoryofdiabetes.??As withmanydiseasesyoucanhelpyourselfbychangingyourlifestyle.Thefirst thingsyoushoulddoarequitsmokinglimityourintakeofalcoholtonomore thanadrinkortwoadayandincreaseyourphysicalactivity.Eventhosewho sufferfromhighbloodpressureordiabetescanimprovetheirodds--andminimize complicationsiftheydohaveaStroke--bykeepingtheirillnessunder control.??Ifyouexperienceanyofthesymptomsyourfirstcall shouldbetoyourdoctor.Itcouldbethecallthatsavesyour life.Thepassageindicatesthatthesymptomsofministrokes
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
Notallmemberstates{{U}}abidedby{{/U}}theprincipletheyhadagreedonpreviously.
Itwashardtosaywhythemandeservedsuch{{U}}shabby{{/U}}treatment.
{{*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}}??????? ??????????Diseases ofAgriculturalPlants{{/B}}??Plantslikeanimalsaresubjectto diseasesofvariouskinds.Ithasbeenestimatedthatsome30000different diseasesattackoureconomicplants;fortyareknowntoattackcomandaboutas manyattackwheat.Theresultsofuncheckedplantdiseasearealltooobviousin countrieswhichhavemarginalfoodsupplies.Theproblemwillsoonbemore widespreadasthepopulationoftheworldincreasesatitsfrighteningrate. Evenincountrieswhicharenowamplyfedbytheiragriculturalproductsthere couldsoonbecriticalfoodshortages.?Itiseasytoimaginethe consequencesofsomedisastrousattackononeofthemajorcrops;theresulting faminescouldkillmillionsofpeopleandtheresultinghardshiponother millionscouldcausepoliticalupheavalsdisastroustotheorderofthe world.??Someplantshaverelativeimmunitytoagreatmany diseaseswhileothershaveasusceptibilitytothem.Thetoleranceofa particularplantchangesasthegrowingconditionschange.Ablightmaybebuta localinfectioneasilycontrolled;ontheotherhanditcanattackparticular plantsinawholeregionornation.Anexampleistheblightwhichkilled virtuallyeverychestnuttreeinNorthAmerica.Anotheristhefamouspotato blightinIrelandinthelastcentury.Asaresultofthatitwasestimated thatonemillionpeoplediedofstarvationandrelatedailments.? ?Plantpathologistshavemaderemarkablestridesinidentifyingthe pathogensofthevariousdiseases.Bacteriamayinvadeaplantthroughan infestationofinsectparasitescarryingthepathogen.Aplantcanalsobe inoculatedbyman.Otherdiseasesmightbecausedbyfunguswhichattacksthe plantintheformofamoldorsmutorrust.Frequentlysuchaprimary infection8willweakentheplantsothatasecondaryinfectionmayresultfrom9 itslackoftolerance.Thesymptomsshownmaycauseanerrorindiagnosisso thattreatmentmaybedirectedtowardbacteriawhichcouldbetheresultofa susceptibilitycausedbyaprimaryvirus infection.Whatisthemainideaofthesecondparagraph?
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}??????? ??????????? ????SilentandDeadly{{/B}}??Transient ischemicattacksTIAsorministrokesresultfromtemporaryinterruptionsof bloodflowtothebrain.Unlikefullstrokestheypresentsymptomslasting anywherefromafewsecondsto24hours.Rarelydotheycausepermanent neurologicaldamagebuttheyareoftenprecursorsofamajorstroke.? ?OurmessageisquiteclearsaysDr.RobertAdamsprofessorof neurologyat-theMedicalCollegeofGeorgiainAugust.TIAswhilelesssevere thanstrokesintheshorttermarequitedangerousandneedaquickdiagnosis andtreatmentaswellasappropriatefollow-uptopreventfuture injury.??Unfortunatelyministrokesaregreatlyunderdiagnosed. AstudyconductedfortheNationalStrokeAssociationindicatesthat2.5%ofall adultsaged18orolderabout4.9millionpeopleintheU.S.haveexperienced aconfirmedTIA4.Anadditional1.2millionAmericansovertheageof45the studyshowedhavemostlikelysufferedaministrokewithoutrealizingit.These findingssuggestthatifthepublicknewhowtospotthesymptomsofstroke especiallyministrokesandsoughtpromptmedicaltreatmentthousandsoflives couldbesavedandmajordisabilitycouldbeavoided.??The problemisthatthesymptomsofaministrokeareoftensubtleandpassing. Nonethelesstherearesignsyoucanlookoutfor:??▲Numbnessor weaknessinthefacearmorlegespeciallyononesideofthebody.? ?▲Troubleseeinginoneorbotheyes.??▲Confusionand difficultyspeakingorunderstanding.??▲Difficultywalking dizzinessorlossofcoordination.??▲Severeheadachewithno knowncause.??Alongwiththesesymptomsresearchershave identifiedsomekeyindicatorsthatincreaseyourchancesofhavingafull-blown strokeafteraTIA:ifyou’reover60haveexperiencedsymptomslastinglonger than10minutesfeelweakandhaveahistoryofdiabetes.??As withmanydiseasesyoucanhelpyourselfbychangingyourlifestyle.Thefirst thingsyoushoulddoarequitsmokinglimityourintakeofalcoholtonomore thanadrinkortwoadayandincreaseyourphysicalactivity.Eventhosewho sufferfromhighbloodpressureordiabetescanimprovetheirodds--andminimize complicationsiftheydohaveaStroke--bykeepingtheirillnessunder control.??Ifyouexperienceanyofthesymptomsyourfirstcall shouldbetoyourdoctor.Itcouldbethecallthatsavesyour life.WhichofthefollowingisNOTtrueofministrokes?
{{*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}}??????? ??????????RedMeat LinkstoHigherRiskofBreastCancer{{/B}}??Exerciseandkeepinga healthyweightaretwothingsthatdoctorssaymighthelpwomenlowertheirrisk ofbreastcancer.??Mothersmayreducetheirriskifthey breastfeedforatleastfourmonths.Forolderwomenhormonereplacement therapycanlowertheriskofsomeotherdiseases.Butithasbeenfoundto increasetheriskofbreastcancer.Sowomenshouldconsidertheirchoices carefully.Thesamemaybesaidfordiet.??Newfindingsshowthat youngerwomenwhoeatalotofredmeathavehigherratesofbreastcancers calledhormone-receptorpositive.Thegrowthisfedbythelevelsofestrogenor anotherhormoneprogesteroneinthebody.??Researchersat BrighamWomen’sHospitalinBostonMassachusettsreportedthefindingsaspart ofahealthstudyofnurses.Theresearchersfollowedthehealthofmorethan 90000womenfrom1991to2003.Thosewhoatethemostredmeatatemorethan oneandone-halfservingsaday.Aservingwasdefinedasroughly84grams. Thosewhoatetheleastredmeatatelessthanthreeservingsaweek.Thisis whatthestudyfoundaboutbreastcancersthatwerehormonereceptor-positive: Thewomenwhoatethemostredmeatwerealmosttwotimesaslikelytogetthem asthewomenwhoatetheleastofit.??EunyoungChothelead authorofthereportsaysmoreresearchisneededtoknowthereasonforthe link.Butinthepastresearchershavesuggestedthatthreethingsmayplaya part.Oneisthewaymeatiscookedorprocessed.Anotheristheuseofgrowth hormonesincows.Andthethirdisthekindofironinredmeat.Thestudy appearsintheArchivesofInternalMedicine.??Andnowwehave moretotellyouaboutoursubject--resveratrol.Wediscussedastudyinthe UnitedStatesthatfoundthatlargeamountsofthisplantcompoundhelpedfat micelivelonger.Themicewerefedmuchmoreresveratrolthanpeoplecouldget fromredwineoneofthefoodsthatcontainsit.??Now scientistsinFrancesayresveratrolalsoimprovesmuscleperformance--again atleastinmice.Theywereabletoruntwotimesasfarinlaboratorytreadmill tests4asmicenormallycould.ThestudyattheInstituteofGeneticsand MolecularandCellularBiologysappearedinthejournal Cell.Estrogenmaycontributetothedevelopmentofbreastcancerasmuchashormonereplacementtherapy.
{{*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}}?????????? ???????TheSafenessofIUDsfor HIV-positiveWomen{{/B}}??1.Womeninfectedwiththemostcommon formofHIVmaysafelyusetheintrauterinedeviceIUDforcontraception providedtheyseeadoctorregularlynewstudyfindingssuggest.? ?2.WorldHealthOrganizationguidelinescurrentlystatethatingeneral HIV-infectedwomenshouldavoidIUDs.Thoseguidelineswereessentiallymadeon theoreticalconcernsandtherearereallyverylittledataonwhat contraceptiveisappropriateforHIV-infectedwomensaidtheleadauthorDr. CharlesS.MorrisoninNorthCarolina.??3.Morrisonand colleaguesgatheredinformationonIUD-relatedcomplicationsat14and24 monthsafterplacementofthedevicein636womenlivinginNairobiKenya.Of thesewomen156hadHIVinfection.Participatingphysiciansdidnotknowthe patients’HIVstatus.Therewaslittledifferenceinanysideeffectsin HIV-infectedwomencomparedwithHIV-uninfectedwomensuggestingthattheIUD islikelyanappropriatemethodforHIV-infectedwomenMorrisonsaid.Thisis animportantissuebecausetherearenow16millionwomenlivingwithHIVanda lotofthemhaveacriticalneedforcontraceptionheadded.? ?4.Theresearchersdidfindthatwomenwithinfectionssuchasgonorrhea orchlamydiaatthestudy’soutsetwereatincreasedriskofIUDcomplications confirmingcurrentguidelinessuggestingthatwomenwithsexuallytransmitted diseasesnotuseIUDs.??5.Inadditiontherewasnodifference intheamountofvirustheHIV-positivewomenwerereleasingfromtheircervix orshedding8atthebeginningofthestudycomparedwith4monthsaftertheIUD wasinsertedtheresearchersreportedintheAugustissueoftheBritish JournalofObstetricsandGynaecology.Converselysomestudieshaveshowna relationshipbetweenincreasedcervicalHIVsheddingandtheuseoforal contraceptives.??6.Whatthisstudysuggestsisthatyouneedto avoidIUDuseinwomenwithacervicalinfectionbutnotwomenwithHIV infectionMorrisonsaid.Womenwithcervicalinfectionsareatincreasedrisk ofcomplications;womenwithHIVinfectionarenot.AccordingtocurrentguidelineswomenshouldnotuseIUDs______
{{*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}}?????????? ???????TheSafenessofIUDsfor HIV-positiveWomen{{/B}}??1.Womeninfectedwiththemostcommon formofHIVmaysafelyusetheintrauterinedeviceIUDforcontraception providedtheyseeadoctorregularlynewstudyfindingssuggest.? ?2.WorldHealthOrganizationguidelinescurrentlystatethatingeneral HIV-infectedwomenshouldavoidIUDs.Thoseguidelineswereessentiallymadeon theoreticalconcernsandtherearereallyverylittledataonwhat contraceptiveisappropriateforHIV-infectedwomensaidtheleadauthorDr. CharlesS.MorrisoninNorthCarolina.??3.Morrisonand colleaguesgatheredinformationonIUD-relatedcomplicationsat14and24 monthsafterplacementofthedevicein636womenlivinginNairobiKenya.Of thesewomen156hadHIVinfection.Participatingphysiciansdidnotknowthe patients’HIVstatus.Therewaslittledifferenceinanysideeffectsin HIV-infectedwomencomparedwithHIV-uninfectedwomensuggestingthattheIUD islikelyanappropriatemethodforHIV-infectedwomenMorrisonsaid.Thisis animportantissuebecausetherearenow16millionwomenlivingwithHIVanda lotofthemhaveacriticalneedforcontraceptionheadded.? ?4.Theresearchersdidfindthatwomenwithinfectionssuchasgonorrhea orchlamydiaatthestudy’soutsetwereatincreasedriskofIUDcomplications confirmingcurrentguidelinessuggestingthatwomenwithsexuallytransmitted diseasesnotuseIUDs.??5.Inadditiontherewasnodifference intheamountofvirustheHIV-positivewomenwerereleasingfromtheircervix orshedding8atthebeginningofthestudycomparedwith4monthsaftertheIUD wasinsertedtheresearchersreportedintheAugustissueoftheBritish JournalofObstetricsandGynaecology.Converselysomestudieshaveshowna relationshipbetweenincreasedcervicalHIVsheddingandtheuseoforal contraceptives.??6.Whatthisstudysuggestsisthatyouneedto avoidIUDuseinwomenwithacervicalinfectionbutnotwomenwithHIV infectionMorrisonsaid.Womenwithcervicalinfectionsareatincreasedrisk ofcomplications;womenwithHIVinfectionarenot.Paragraph2______
Inhistwo-hour-longlecturehemadean{{U}}exhaustive{{/U}}analysisoftheissue.
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}??????? ??????????? ??????Obesity{{/B}}??Obesity referstothemedicalconditioncharacterizedbystorageofexcessbodyfat.The humanbodynaturallystoresfattissueundertheskinandaroundorgansand joints.Fatiscriticalforgoodhealthbecauseitisasourceofenergywhen thebodylackstheenergynecessarytosustainlifeprocessesanditprovides insulationandprotectionforinternalorgans.Buttoomuchfatinthebodyis associatedwithavarietyofhealthproblems.??Mostphysicians usethebodymassindexBMItodeterminedesirableweights.BMIiscalculated asweightdividedbyheightandpeoplewithaBMIof27oraboveareconsidered obese.??Weight-heighttablessuchasthosepublishedbythe MetropolitanLifeInsuranceCompanyarealsousedasgeneralmeasuresof desirableweightranges3.Thesetablesassignarangeofweightsfora particularheight.Forexampleamanof1.8mhasadesirablerangeof66to83 kgwithanaverageof75kg.Awomanwhois1.6mhasadesirablerangebetween 53and70kgwithanaverageof62kg.??TheBMIand weight-heighttablesonlyprovideroughestimatesofdesirableweightsand scientistsrecognizethatmanyotherfactorsbesidesheightaffectweight. Weightalonemaynotbeanindicatoroffatasinthecaseofabody-builder whomayhaveahighBMIbecauseofahighpercentageofmuscletissuewhich weighsmorethanfat.Likewiseapersonwithasedentarylifestylemaybe withinadesirableweightrangebuthaveexcessfattissue.? ?Obesityincreasestheriskofdevelopingdisease.Accordingtosome estimatesalmost70percentofheartdiseasecasesarelinkedtoexcessbody fatandobesepeoplearemorethantwiceaslikelytodevelophighblood pressure.Obesewomenareatnearlytwicetheriskfordevelopingbreastcancer andallobesepeoplehaveanestimated42percenthigherchanceofdeveloping coloncancer.Theriskofmedicalcomplicationsparticularlyheartdisease increaseswhenbodyfatisdistributedaroundthewaistespeciallyinthe abdomen.Thistypeofupperbodyfatdistributionismorecommoninmenthanin women.??Thesocialandpsychologicalproblemsexperiencedby obesepeoplearealsoformidable.Stereotypesaboutfatpeopleareoften translatedintodiscriminatorypracticesineducationemploymentandsocial relationships.Theconsequencesofbeingobeseinaworldwherepeoplehad betterbethinareespeciallysevereforwomenwhoseappearancesareoften judgedagainstanidealofexaggeratedslimness. Aheavyman
{{*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}}?????????? ???????TheSafenessofIUDsfor HIV-positiveWomen{{/B}}??1.Womeninfectedwiththemostcommon formofHIVmaysafelyusetheintrauterinedeviceIUDforcontraception providedtheyseeadoctorregularlynewstudyfindingssuggest.? ?2.WorldHealthOrganizationguidelinescurrentlystatethatingeneral HIV-infectedwomenshouldavoidIUDs.Thoseguidelineswereessentiallymadeon theoreticalconcernsandtherearereallyverylittledataonwhat contraceptiveisappropriateforHIV-infectedwomensaidtheleadauthorDr. CharlesS.MorrisoninNorthCarolina.??3.Morrisonand colleaguesgatheredinformationonIUD-relatedcomplicationsat14and24 monthsafterplacementofthedevicein636womenlivinginNairobiKenya.Of thesewomen156hadHIVinfection.Participatingphysiciansdidnotknowthe patients’HIVstatus.Therewaslittledifferenceinanysideeffectsin HIV-infectedwomencomparedwithHIV-uninfectedwomensuggestingthattheIUD islikelyanappropriatemethodforHIV-infectedwomenMorrisonsaid.Thisis animportantissuebecausetherearenow16millionwomenlivingwithHIVanda lotofthemhaveacriticalneedforcontraceptionheadded.? ?4.Theresearchersdidfindthatwomenwithinfectionssuchasgonorrhea orchlamydiaatthestudy’soutsetwereatincreasedriskofIUDcomplications confirmingcurrentguidelinessuggestingthatwomenwithsexuallytransmitted diseasesnotuseIUDs.??5.Inadditiontherewasnodifference intheamountofvirustheHIV-positivewomenwerereleasingfromtheircervix orshedding8atthebeginningofthestudycomparedwith4monthsaftertheIUD wasinsertedtheresearchersreportedintheAugustissueoftheBritish JournalofObstetricsandGynaecology.Converselysomestudieshaveshowna relationshipbetweenincreasedcervicalHIVsheddingandtheuseoforal contraceptives.??6.Whatthisstudysuggestsisthatyouneedto avoidIUDuseinwomenwithacervicalinfectionbutnotwomenwithHIV infectionMorrisonsaid.Womenwithcervicalinfectionsareatincreasedrisk ofcomplications;womenwithHIVinfectionarenot.Frombothcurrentguidelinesandthenewstudywemayconclude______
{{*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}}??????? ??????????RedMeat LinkstoHigherRiskofBreastCancer{{/B}}??Exerciseandkeepinga healthyweightaretwothingsthatdoctorssaymighthelpwomenlowertheirrisk ofbreastcancer.??Mothersmayreducetheirriskifthey breastfeedforatleastfourmonths.Forolderwomenhormonereplacement therapycanlowertheriskofsomeotherdiseases.Butithasbeenfoundto increasetheriskofbreastcancer.Sowomenshouldconsidertheirchoices carefully.Thesamemaybesaidfordiet.??Newfindingsshowthat youngerwomenwhoeatalotofredmeathavehigherratesofbreastcancers calledhormone-receptorpositive.Thegrowthisfedbythelevelsofestrogenor anotherhormoneprogesteroneinthebody.??Researchersat BrighamWomen’sHospitalinBostonMassachusettsreportedthefindingsaspart ofahealthstudyofnurses.Theresearchersfollowedthehealthofmorethan 90000womenfrom1991to2003.Thosewhoatethemostredmeatatemorethan oneandone-halfservingsaday.Aservingwasdefinedasroughly84grams. Thosewhoatetheleastredmeatatelessthanthreeservingsaweek.Thisis whatthestudyfoundaboutbreastcancersthatwerehormonereceptor-positive: Thewomenwhoatethemostredmeatwerealmosttwotimesaslikelytogetthem asthewomenwhoatetheleastofit.??EunyoungChothelead authorofthereportsaysmoreresearchisneededtoknowthereasonforthe link.Butinthepastresearchershavesuggestedthatthreethingsmayplaya part.Oneisthewaymeatiscookedorprocessed.Anotheristheuseofgrowth hormonesincows.Andthethirdisthekindofironinredmeat.Thestudy appearsintheArchivesofInternalMedicine.??Andnowwehave moretotellyouaboutoursubject--resveratrol.Wediscussedastudyinthe UnitedStatesthatfoundthatlargeamountsofthisplantcompoundhelpedfat micelivelonger.Themicewerefedmuchmoreresveratrolthanpeoplecouldget fromredwineoneofthefoodsthatcontainsit.??Now scientistsinFrancesayresveratrolalsoimprovesmuscleperformance--again atleastinmice.Theywereabletoruntwotimesasfarinlaboratorytreadmill tests4asmicenormallycould.ThestudyattheInstituteofGeneticsand MolecularandCellularBiologysappearedinthejournal Cell.Thewayredmeatispreparedhasmuchtodowiththeprobabilityofbreastcancer.
{{*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}}?????????? ???????TheSafenessofIUDsfor HIV-positiveWomen{{/B}}??1.Womeninfectedwiththemostcommon formofHIVmaysafelyusetheintrauterinedeviceIUDforcontraception providedtheyseeadoctorregularlynewstudyfindingssuggest.? ?2.WorldHealthOrganizationguidelinescurrentlystatethatingeneral HIV-infectedwomenshouldavoidIUDs.Thoseguidelineswereessentiallymadeon theoreticalconcernsandtherearereallyverylittledataonwhat contraceptiveisappropriateforHIV-infectedwomensaidtheleadauthorDr. CharlesS.MorrisoninNorthCarolina.??3.Morrisonand colleaguesgatheredinformationonIUD-relatedcomplicationsat14and24 monthsafterplacementofthedevicein636womenlivinginNairobiKenya.Of thesewomen156hadHIVinfection.Participatingphysiciansdidnotknowthe patients’HIVstatus.Therewaslittledifferenceinanysideeffectsin HIV-infectedwomencomparedwithHIV-uninfectedwomensuggestingthattheIUD islikelyanappropriatemethodforHIV-infectedwomenMorrisonsaid.Thisis animportantissuebecausetherearenow16millionwomenlivingwithHIVanda lotofthemhaveacriticalneedforcontraceptionheadded.? ?4.Theresearchersdidfindthatwomenwithinfectionssuchasgonorrhea orchlamydiaatthestudy’soutsetwereatincreasedriskofIUDcomplications confirmingcurrentguidelinessuggestingthatwomenwithsexuallytransmitted diseasesnotuseIUDs.??5.Inadditiontherewasnodifference intheamountofvirustheHIV-positivewomenwerereleasingfromtheircervix orshedding8atthebeginningofthestudycomparedwith4monthsaftertheIUD wasinsertedtheresearchersreportedintheAugustissueoftheBritish JournalofObstetricsandGynaecology.Converselysomestudieshaveshowna relationshipbetweenincreasedcervicalHIVsheddingandtheuseoforal contraceptives.??6.Whatthisstudysuggestsisthatyouneedto avoidIUDuseinwomenwithacervicalinfectionbutnotwomenwithHIV infectionMorrisonsaid.Womenwithcervicalinfectionsareatincreasedrisk ofcomplications;womenwithHIVinfectionarenot.Paragraph4______
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
OnAntibodies Substancesforeigntothebodysuchasdisease-causingbacteriaandvirusesandotherinfectiousagentsarerecognizedbythebodysimmunesystemasinvaders.Ournaturaldefensesagainsttheseinfectiousagentsareantibodiesproteinsthatseekouttheantigens抗原andhelpdestroythem. Antibodieshavetwoveryusefulcharacteristics.Firsttheyareextremelyspecific;thatiseachantibodybindstoandattacksoneparticularantigen.Secondsomeantibodiesonceactivatedbytheoccurrenceofadiseasecontinuetoconferresistanceagainstthatdisease.Classicexamplearetheantibodiestothechildhooddiseasesofchickenpox水痘andmeasles. Thesecondcharacteristicofantibodiesmakesitpossibletodevelopvaccines.Avaccine痘苗isapreparationofkilledorweakenedbacteriaorvirusesthatwhenintroducedintothebodystimulatestheproductionofantibodiesagainsttheantigensitcontains. Itisthefirsttraitofantibodiestheirspecificitythatmakesmonoclonalantibodytechnologysovaluable.Notonlycanantibodiesbeusedtherapeutically在治疗上toprotectagainstdisease;theycanalsohelpto.diagnoseawidevarietyofillnessesandcandetectthepresenceofdrugsviralandbacterialproductsandotherunusualorabnormalsubstancesintheblood. Givensuchadiversityofusesforthesediseased-fightingsubstancestheirproductioninpurequantitieshaslongbeenthefocusofscientificinvestigation.Theconventionalmethodwastoinjectalaboratoryanimalwithanantigenandthenafterantibodieshadbeenformedcollectthoseantibodiesfromthebloodserum血清Antibodycontainingbloodserumiscalledantiserum抗血清.Therearetwoproblemswiththismethod:Ityieldsantiserumthatcontainsundesiredsubstancesanditprovidesaverysmallamountofusableantibody. Monoclonalantibodytechnologyallowsustoproducelargeamountsofpureantibodies.inthefollowingway:wecanobtaincellsthatproduceantibodiesnaturally;wealsohaveavailableaclassofcellsthatcangrowcontinuallyincellculture培养.Ifweformahybrid混血儿thatcombinesthecharacteristicofimmortality永生withtheabilitytoproducethedesiredsubstancewewouldhaveineffectafactorytoproduceantibodiesthatworkaroundtheclock. Inmonoclonalantibodytechnologytumorcellsthatcanreplicate重复endlesslyarefusedwithmammaliancellsthatproduceanantibody.Theresultofthiscellfusionisahybridoma杂交瘤whichwillcontinuallyproduceantibodies.Theseantibodiesarecalledmonoclonalbecausetheycomefromonlyonetypeofcellthehybridomacell;antibodiesproducedbyconventionalmethodsontheotherhandarederivedfrompreparationscontainingmanykindsofcellsandhencearecalledpolyclonal.Anexampleofhowmonoclonalantibodiesarederivedisdescribedbelow. Amyelomaisatumorofthebonemarrow骨髓thatcanbeadaptedtogrowpermanendyincellculture.Whenmyelomacellswerefusedwithantibody-producingmammalianspleencellsitwasfoundthattheresultinghybridcellsorhybridomasproducedlargeamountsofmonoclonal骨髓瘤antibody.Thisproductofcellfusioncombinedthedesiredqualitiesofthetwodifferenttypesofcells:theabilitytogrowcontinuallyandtheabilitytoproducelargeamountsofpureantibody. Becauseselectedhybridcellsproduceonlyonespecificantibodytheyaremorepurethanthepolyclonalantibodiesproducedbyconventionaltechniques.Theyarepotentiallymoreeffectivethanconventionaldrugsinfightingdiseasesincedrugsattacknotonlytheforeignsubstancebutthebody’sowncellsaswellsometimesproducingundesirablesideeffectssuchasnausea恶心andallergicreactions.Monoclonalantibodiesattackthetargetmoleculeandonlythetargetmoleculewithnoorgreatlydiminishedsideeffects. Whichofthefollowingstatementsisfalse?
TheUnitedStates In1782【51】theUnitedStateswonitsindependencethebaldeaglewaschosen【52】thenationalbirdofthenewcountry.Americanleaderswantedtheeagletobea【53】oftheircountrybecauseit’’sabirdofstrengthandcourage.TheychosethebaldeaglebecauseitwasfoundalloverNorthAmericaandonlyinNorthAmerica. Butalittleover200years【54】thebaldeaglehadalmostdisappearedfromthecountryIn1972therewereonly3000baldeaglesintheentireUnitedStates.Thereasonforthebirds【55】populationwaspollutionespeciallypollutionofriversbypesticides.Pesticidesarechemicals【56】tokillinsectsandotheranimalsthatattackanddestroycrops. 【57】rainoftenwashespesticidesintorivers.Pesticidespollutetheriversandpoisonthefish.Eagleseat【58】andthepoison【59】theireggs.Theeggshaveverythinshellsanddonothatch. Eagles【60】onlytwoorthreeeggsayear.Becausemanyoftheeggsdidnot【61】andproducemoreeagles【62】eaglesquickly【63】smaller. TodaytheAmericanGovernmentandtheAmericanpeoplearetryingtoprotectthebaldeagle.Thenumberofbaldeagles【64】Itnowappears【65】theAmericannationalbirdwillsurviveandremainasymbolofstrengthandcourage.
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