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{{U}}Practically{{/U}} all species of animals communicate either through sounds or through a large r...
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Tinaisa/'speʃəl/friendofmine.
能判断心脏舒张功能的检查是
心动超声
二阶递试验
SPE
胸片
心电图
They________middleschoolstudentsandthey________har
are all; work all
are all; all work
all are; work all
all are; all work
—Howmucharethesebananas________?—Fiveyuan.—Ohit’sn
at all; at all
in all; in all
in all; at all
at all; in all
对于层次化L3VPN说法错误的有
UPE主要完成用户接入功能
通过分层式PE的嵌套，理论上可以将VPN无限扩展与延伸。
SPE的路由表容量大，转发性能强，接口资源较多； UPE的路由容量和转发性能较低，但接入能力强。HoVPN充分利用了SPE的性能和UPE的接入能力
SPE-UPE，SPE和UPE之间运行MP-BGP，可以是MP-IBGP，也可以是MP-EBGP，这取决于UPE和SPE是否属于同一个AS。PTN网络规划一般采取MP-IBGP。
SPE主要完成VPN路由的管理和发布
MarycanspeakEnglishandIcanspeak Chinawelearnwithea
1分Doyoudoanything[ˈspeʃl]fortheSpringFestival
Asa[ˈspeʃl]giftourparentstookustoIndia.
关于固相萃取SPE和固相微萃取SPME方法下列说法不准确的是
SPE是一个柱色谱分离过程
SPME是在SPE的基础上结合顶空分析技术的一种萃取分离技术
SPE操作步骤包括柱预处理、加样和回收分析物三个步骤
SPE过程中柱预处理可以除去填料中的杂质和润湿吸附剂
Lookinsidethewardrobe衣橱inyourhouse.Whatjumpstoyour
根据下面的音标写出单词1./intrə’dju:se／2./'rekəg﹑natz／3./'tuər
单词拼写根据所给音标和旬意在答题卷标有题号的横线上写出空缺处各单词的正确形式每空只写1个词1.Yao
与X-叮比较SPE局部脑血流显像诊断缺血性脑病时对下列哪些情况更具优势
TIA
腔隙性脑梗死
超过48小时的脑梗死灶
48小时以内的脑梗死灶
对脑瘤术后肿瘤复发与瘢痕形成的鉴别诊断
什么是固相外延SPE及固相外延中存在的问题
激活B细胞的超抗原为
金黄色葡萄球菌肠毒素
小鼠乳腺肿瘤蛋白
SPE
HSP
HIVgp120
CAD中修改样条曲线的快捷键是
DT
ML
PL
SPE
在低压供配电系统中当16mm2≤35mm2SPE为mm2
16
25
35
50
绿电制氢是指利用富裕的制取氢气目前主流的技术有3种分别是碱 性电制氢技术固体聚合物SPE电制氢技术和
火电
光伏
风电
水电
SPE操作一般有以下几步
固定相活化
样品上柱
淋洗
洗脱
在低压供配电系统中当时SPE应为
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{{*HTML*}}{{B}}第二篇{{/B}} {{B}}??????? ????????FDA:HumanAnimalWaste ThreatensProduce{{/B}}??Thebiggestfoodsafetyriskforfresh fruitsandvegetablesastheyaregrownpickedorprocessedcomesfromhuman andanimalwastetheUSFoodandDrugAdministrationFDAsaid Friday.??Morethan9000Americansdieeachyearfromfood-borne diseasesandsomescientistsbelievefreshproduceisthebiggestcarrierof contamination.??TheFDAissuedasetofdraftguidelinesforUS andforeigngrowerstocarefullymonitorworkerhygienewaterqualitymanure managementandtransportation.??This34-pagedraftguidelines urgedgrowerstogiveworkerslessonsonbasichygienesuchasUsingsoapto washtheirhandscoveringwoundsthatcouldcomeintocontactwithproduceand usingonlycleantoilets.??TheFDAguidelinesidentifiedthe majorsourceofcontaminationforfreshproduceashumanoranimal feces.??Wethinkjustpropercontrolsandproperattentionto detailwouldmakeabigdifferenceinfoodsafetysaidanFDAofficial.Itis ourbeliefthattheseguidelineswouldnotbeverycostly.??But growergroupsdisagreedwiththeFDA’sassessment.Mostfood-bornedisease outbreaksthathappenfurtherdownthedistributionlinearedueto contaminationbecausepeoplepreparingfoodarenotproperlywashingtheir handssaidStaceyZawalanofficialwithUnitedFreshFruitandVegetable Association.Thatisnotnecessarilytrueforgrowersandpackers.? ?SomeUSgrowerorganizationshaveexpressedconcernthattheagencyis interferingwithon-farmpractices.8OthersobjecttotheFDA’sproposalto havegrowersformallydocumentthepickinghandlingandtransportationof producesothathealthofficialscouldquicklyrecallfoodsif necessary.??ConsumergroupscriticizedtheFDAguidelinesasof littleusebecausetheywillnotcarrytheforceoflawtoButstricter regulationscouldevolveasresearchersfindnewtechnologyormethodstokill harmfulbacteriaorparasitestheFDAsaid.??TheFDA recommendationsareduetobemadefinalbytheFDAlaterthisyearforuseby USandforeigngrowers.Thematterofencouragingforeigngrowerstoadoptthe guidelinesremainssomewhattrickybutFDAofficialssayitisvitalbecauseof thehugeamountofimportedproduce.Somefruitgrowergroupsbelievethatmostfood-bornediseasesarecausedby
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
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{{*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}}?????????? ??????????? ?????ScreenTest{{/B}}??1.Everyyear millionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.If thishappensearlyenoughthediseasecanoftenbetreatedsuccessfully. Accordingtoasurveypublishedlastyear21countrieshavescreening programmes.NineofthemincludingAustraliaCanadatheUSandSpainscreen womenunder50.??2.Butthemedicalbenefitsofscreeningthese youngerwomenarecontroversialpartlybecausetheradiationbringsasmall riskofinducingcancer.Alsoyoungerwomenmustbegivenhigherdosesof X-raysbecausetheirbreasttissueisdenser.??3.Researchersat thePolytechnicUniversityofValenciaanalysedtheeffectofscreeningmore than160000womenat11localclinics.Afterestimatingthewomen’scumulative doseofradiationtheyusedtwomodelstocalculatethenumberofextracancers thiswouldcause.??4.Themathematicalmodelrecommendedby Britain’sNationalRadiologicalProtectionBoardNRPBpredictedthatthe screeningprogrammewouldcause36cancersper100000women18ofthemfatal. ThemodelpreferredbytheUNScientificCommitteeontheEffectsofAtomic Radiationledtoalowerfigureof20cancers.??5.The researchersarguethatthelevelofradiation-inducedcancersisnotvery significantcomparedtothefarlargernumberofcancersthatarediscovered andtreated.TheValenciaprogrammetheysaydetectsbetween300and450cases ofbreastcancerinevery100000womenscreened.??6.Butthey pointoutthattheriskofwomencontractingcancerfromradiationcouldbe reducedbybetween40and80percentifscreeningbeganat50insteadof45 becausetheywouldbeexposedtolessradiation.Theresultsoftheirstudy theysuggestcouldhelpoptimisethetechniqueforbreastcancer screening.??7.Thereisatrade-offbetweenthediagnostic benefitsofbreastscreeninganditsrisksadmitsMichaelClarkoftheNRPB. Buthewarnsthatthestudyshouldbeinterpretedwithcaution.Onthebasisof thecurrentdataforevery10cancerssuccessfullydetectedandpreventedthere isariskofcausingonelaterinlife.That’swhyradiationexposureshouldbe minimisedinanyscreeningprogramme.Paragraph4______
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{{*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}}?????????? ??????????? ?????ScreenTest{{/B}}??1.Everyyear millionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.If thishappensearlyenoughthediseasecanoftenbetreatedsuccessfully. Accordingtoasurveypublishedlastyear21countrieshavescreening programmes.NineofthemincludingAustraliaCanadatheUSandSpainscreen womenunder50.??2.Butthemedicalbenefitsofscreeningthese youngerwomenarecontroversialpartlybecausetheradiationbringsasmall riskofinducingcancer.Alsoyoungerwomenmustbegivenhigherdosesof X-raysbecausetheirbreasttissueisdenser.??3.Researchersat thePolytechnicUniversityofValenciaanalysedtheeffectofscreeningmore than160000womenat11localclinics.Afterestimatingthewomen’scumulative doseofradiationtheyusedtwomodelstocalculatethenumberofextracancers thiswouldcause.??4.Themathematicalmodelrecommendedby Britain’sNationalRadiologicalProtectionBoardNRPBpredictedthatthe screeningprogrammewouldcause36cancersper100000women18ofthemfatal. ThemodelpreferredbytheUNScientificCommitteeontheEffectsofAtomic Radiationledtoalowerfigureof20cancers.??5.The researchersarguethatthelevelofradiation-inducedcancersisnotvery significantcomparedtothefarlargernumberofcancersthatarediscovered andtreated.TheValenciaprogrammetheysaydetectsbetween300and450cases ofbreastcancerinevery100000womenscreened.??6.Butthey pointoutthattheriskofwomencontractingcancerfromradiationcouldbe reducedbybetween40and80percentifscreeningbeganat50insteadof45 becausetheywouldbeexposedtolessradiation.Theresultsoftheirstudy theysuggestcouldhelpoptimisethetechniqueforbreastcancer screening.??7.Thereisatrade-offbetweenthediagnostic benefitsofbreastscreeninganditsrisksadmitsMichaelClarkoftheNRPB. Buthewarnsthatthestudyshouldbeinterpretedwithcaution.Onthebasisof thecurrentdataforevery10cancerssuccessfullydetectedandpreventedthere isariskofcausingonelaterinlife.That’swhyradiationexposureshouldbe minimisedinanyscreeningprogramme.Delayingtheageatwhichscreeningstartsmay______
TheAsianFluVirus In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusualnumberofinfluenza-likecases.Influenzaissometimescalledfluorasbadcold.Hetookspecimensfromthethroatsofpatientsinhishospitalandwasabletofindthevirusofthisinfluenza. Therearethreemaintypesoftheinfluenzavirus.ThemostimportantofthesearetypesAandBeachofthemhavingseveralsub-groups.WiththeinstrumentsatthehospitalthedoctorrecognizedthattheoutbreakwasduetoavirusgroupAbuthedidnotknowthesub-group.HereportedtheoutbreaktotheWorldHealthOrganizationinGeneva.W.H.0.publishedtheimportantnewsalongsidereportsofasimilaroutbreakinHongKongwhereabout15%-20%ofthepopulationhadbecomeill. AssoonastheLondondoctorsreceivedthepackageofthroatsamplestheybeganthestandardtests.Theyfoundthatbyreproducingitselfataveryhighspeedthevirushadmultipliedmorethanamilliontimeswithintwodays.Continuingtheircarefulteststhedoctorscheckedtheeffectofdrugsusedagainstalltheknownsub-groupsoftypeAvirusonthisvirus.Noneofthemgaveanyprotection.Thisthenwassomethingnew:anewinfluenzavirusagainstwhichthepeopleoftheworldhadnoreadyhelpwhatsoever. Havingisolatedthevirustheywereworkingwiththetwodoctorsnowconductedtestsonsomespeciallyselectedanimalswhichcontractinfluenzainthesamewayashumanbeingsdo.Inashorttimetheusualsignsofthediseaseappeared.Theseexperimentsrevealedthatthenewvirusspreadeasilybutthatitwasnotakiller.ScientistslikegeneralpubliccalleditsimplyAsianflu. TheAsianfluvirus______.
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
{{*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}}??????? ??????????? ??AdaptationofLivingThings{{/B}}??Certainanimalsand plantsdevelopcharacteristicsthathelpthemcopewiththeirenvironments betterthanothersoftheirkind.Thisnaturalbiologicalprocessiscalled adaptation.Amongthesuperiorcharacteristicsdevelopedthroughadaptationare thosethatmayhelpingettingfoodorshelterinprovidingprotectionandin producingandprotectingtheyoung.Thatresultsintheevolutionofmoreand moreorganismsthatarebetterfittedtotheirenvironments.? ?Eachlivingthingisadaptedtoitswayoflifeinageneralwaybuteach isadaptedespeciallytoitsowndistinctclass.Aplantforexampledepends uponitsrootstofixitselffirmlyandtoabsorbwaterandinorganicchemicals. Itdependsuponitsgreenleavesforusingthesun’senergytomakefoodfrom inorganicchemicals.Thesearegeneraladaptationscommontomostplants.In additiontherearespecialadaptationsthatonlycertainkindsofplants have.??Manyanimalshaveadaptationsthathelpthemescapefrom theirenemies.Someinsectsarehiddenbytheirbodycolororshapeandmany looklikealeaforalittlebranch.Thecoatsofdeerarecoloredtomixwith thesurroundings.Manyanimalshavetheabilitytoremaincompletelystillwhen anenemyisnear.??Organismshaveagreatvarietyofwaysof adapting.Theymayadaptintheirstructurefunctionandgenetics;intheir developmentandproductionoftheyoung;andinotherrespects.Anorganismmay createitsownenvironmentasdowarm-bloodedmammalswhichhavetheability toadjustbodyheatexactlytomaintaintheiridealtemperaturedespitechanging weather.Usuallyadaptationsareanadvantagebutsometimesanorganismisso welladaptedtoaparticularenvironmentthatifconditionschangeitfindsit difficultorimpossibletoreadapttothenew conditions.Someplantsandanimalsdevelopsuperiorcharacteristicssothattheymay
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WhileservingintheSenateintheearly1970'sBarbaraJordansupportedlegislationto{{U}}ban{{/U}}discriminationandtodealwithenvironmentalproblems.
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TheAsianFluVirus In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusualnumberofinfluenza-likecases.Influenzaissometimescalledfluorasbadcold.Hetookspecimensfromthethroatsofpatientsinhishospitalandwasabletofindthevirusofthisinfluenza. Therearethreemaintypesoftheinfluenzavirus.ThemostimportantofthesearetypesAandBeachofthemhavingseveralsub-groups.WiththeinstrumentsatthehospitalthedoctorrecognizedthattheoutbreakwasduetoavirusgroupAbuthedidnotknowthesub-group.HereportedtheoutbreaktotheWorldHealthOrganizationinGeneva.W.H.0.publishedtheimportantnewsalongsidereportsofasimilaroutbreakinHongKongwhereabout15%-20%ofthepopulationhadbecomeill. AssoonastheLondondoctorsreceivedthepackageofthroatsamplestheybeganthestandardtests.Theyfoundthatbyreproducingitselfataveryhighspeedthevirushadmultipliedmorethanamilliontimeswithintwodays.Continuingtheircarefulteststhedoctorscheckedtheeffectofdrugsusedagainstalltheknownsub-groupsoftypeAvirusonthisvirus.Noneofthemgaveanyprotection.Thisthenwassomethingnew:anewinfluenzavirusagainstwhichthepeopleoftheworldhadnoreadyhelpwhatsoever. Havingisolatedthevirustheywereworkingwiththetwodoctorsnowconductedtestsonsomespeciallyselectedanimalswhichcontractinfluenzainthesamewayashumanbeingsdo.Inashorttimetheusualsignsofthediseaseappeared.Theseexperimentsrevealedthatthenewvirusspreadeasilybutthatitwasnotakiller.ScientistslikegeneralpubliccalleditsimplyAsianflu. Themainideaofthispassageisthat______.
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
Guestswere{{U}}scared{{/U}}whenthebombexploded.
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
{{*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}}??????? ??????????? ????????Foodand Cancer{{/B}}??Medicalexpertshavesuspectedformanyyearsthat thereisastronglinkbetweenwhatapersoneatsandcancer.Theysayanew studyprovidesthefirstevidencethatvitaminscouldreduceaperson’schance ofdevelopingcancer.AteamofChineseandAmericanscientistsdidthestudy. TheyarefromAmericanNationalCancerInstituteandtheCancerInstituteofthe ChineseAcademyofMedicalSciencesinBeijing.TheJournaloftheNational CancerInstitutepublishedtheresultsofthestudy.Aboutthirtythousand peoplebetweentheagesof40to69tookpartinthestudy.Theywerefromthe northerncentralChineseareaofLinxian.Mostofthemtookvitaminsand mineralseverydayforfiveyears.??Linxianwaschosenbecause thepeopletherehaveanextremelyhighrateofcancerofstomachandesophagus. Researchersbelievethatfungusandmoldsinlocalfoodsmaybepartly responsibleforthehighcancerrate.Researchersdividedthoseintoeight groups.Sevenofthegroupsreceiveddifferentmixturesofvitaminsandminerals daily.Theamountsofthevitaminsandmineralswere1to2timesgreaterthan whatAmericanhealthofficialssayisneeded.Theeighthgroupreceivedsugar pillsthathadnoeffect.Thosewhoseemedtogainthemostreceivedamixture ofaformofvitaminAcalledβ-carotenevitaminEandthemineralselenium. Thevitaminandmineralarebelievedtopreventdamagetocellscausedby cancer-causingsubstances.Researchersreporteda13percentdropincancer ratesinthosewhotookβ-carotenevitaminEandselenium.Theyalsofounda10 percentdropinthenumberofdeathscausedbystrokesfromburstingblood vessels.??Scientistswarnthatitistoosoontoknowifthe effectwouldbethesameamongpeopleinothercountries.Theynotethatthe peopleinLinxianeatfoodsthatlacknecessaryvitaminsandminerals.Chinese officialswillcontinuetorecordthehealthrecordsofthepeopleinLinxian formanyyears.Fornowofficialsreportedlyareconsideringusingthe.results ofthestudy.TheywanttofindawaytoimprovethehealthofpeopleinLinxian andothersmalltownsinChina.Allthosepeoplewhotookpartinthestudyreceivedvitaminsandminerals.
{{*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}}?????????? ??????????? ?????ScreenTest{{/B}}??1.Everyyear millionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.If thishappensearlyenoughthediseasecanoftenbetreatedsuccessfully. Accordingtoasurveypublishedlastyear21countrieshavescreening programmes.NineofthemincludingAustraliaCanadatheUSandSpainscreen womenunder50.??2.Butthemedicalbenefitsofscreeningthese youngerwomenarecontroversialpartlybecausetheradiationbringsasmall riskofinducingcancer.Alsoyoungerwomenmustbegivenhigherdosesof X-raysbecausetheirbreasttissueisdenser.??3.Researchersat thePolytechnicUniversityofValenciaanalysedtheeffectofscreeningmore than160000womenat11localclinics.Afterestimatingthewomen’scumulative doseofradiationtheyusedtwomodelstocalculatethenumberofextracancers thiswouldcause.??4.Themathematicalmodelrecommendedby Britain’sNationalRadiologicalProtectionBoardNRPBpredictedthatthe screeningprogrammewouldcause36cancersper100000women18ofthemfatal. ThemodelpreferredbytheUNScientificCommitteeontheEffectsofAtomic Radiationledtoalowerfigureof20cancers.??5.The researchersarguethatthelevelofradiation-inducedcancersisnotvery significantcomparedtothefarlargernumberofcancersthatarediscovered andtreated.TheValenciaprogrammetheysaydetectsbetween300and450cases ofbreastcancerinevery100000womenscreened.??6.Butthey pointoutthattheriskofwomencontractingcancerfromradiationcouldbe reducedbybetween40and80percentifscreeningbeganat50insteadof45 becausetheywouldbeexposedtolessradiation.Theresultsoftheirstudy theysuggestcouldhelpoptimisethetechniqueforbreastcancer screening.??7.Thereisatrade-offbetweenthediagnostic benefitsofbreastscreeninganditsrisksadmitsMichaelClarkoftheNRPB. Buthewarnsthatthestudyshouldbeinterpretedwithcaution.Onthebasisof thecurrentdataforevery10cancerssuccessfullydetectedandpreventedthere isariskofcausingonelaterinlife.That’swhyradiationexposureshouldbe minimisedinanyscreeningprogramme.Earlydiscoveryofbreastcancermay______A.becostly
TheConstitution's{{U}}vague{{/U}}naturehasgivenittheflexibilitytobeadaptedwhencircumstanceschange.
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
Theyalways{{U}}mock{{/U}}mebecauseIamugly.
{{*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}}?????????? ??????????? ?????ScreenTest{{/B}}??1.Everyyear millionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.If thishappensearlyenoughthediseasecanoftenbetreatedsuccessfully. Accordingtoasurveypublishedlastyear21countrieshavescreening programmes.NineofthemincludingAustraliaCanadatheUSandSpainscreen womenunder50.??2.Butthemedicalbenefitsofscreeningthese youngerwomenarecontroversialpartlybecausetheradiationbringsasmall riskofinducingcancer.Alsoyoungerwomenmustbegivenhigherdosesof X-raysbecausetheirbreasttissueisdenser.??3.Researchersat thePolytechnicUniversityofValenciaanalysedtheeffectofscreeningmore than160000womenat11localclinics.Afterestimatingthewomen’scumulative doseofradiationtheyusedtwomodelstocalculatethenumberofextracancers thiswouldcause.??4.Themathematicalmodelrecommendedby Britain’sNationalRadiologicalProtectionBoardNRPBpredictedthatthe screeningprogrammewouldcause36cancersper100000women18ofthemfatal. ThemodelpreferredbytheUNScientificCommitteeontheEffectsofAtomic Radiationledtoalowerfigureof20cancers.??5.The researchersarguethatthelevelofradiation-inducedcancersisnotvery significantcomparedtothefarlargernumberofcancersthatarediscovered andtreated.TheValenciaprogrammetheysaydetectsbetween300and450cases ofbreastcancerinevery100000womenscreened.??6.Butthey pointoutthattheriskofwomencontractingcancerfromradiationcouldbe reducedbybetween40and80percentifscreeningbeganat50insteadof45 becausetheywouldbeexposedtolessradiation.Theresultsoftheirstudy theysuggestcouldhelpoptimisethetechniqueforbreastcancer screening.??7.Thereisatrade-offbetweenthediagnostic benefitsofbreastscreeninganditsrisksadmitsMichaelClarkoftheNRPB. Buthewarnsthatthestudyshouldbeinterpretedwithcaution.Onthebasisof thecurrentdataforevery10cancerssuccessfullydetectedandpreventedthere isariskofcausingonelaterinlife.That’swhyradiationexposureshouldbe minimisedinanyscreeningprogramme.Paragraph2______
{{*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}}??????? ??????????? ??AdaptationofLivingThings{{/B}}??Certainanimalsand plantsdevelopcharacteristicsthathelpthemcopewiththeirenvironments betterthanothersoftheirkind.Thisnaturalbiologicalprocessiscalled adaptation.Amongthesuperiorcharacteristicsdevelopedthroughadaptationare thosethatmayhelpingettingfoodorshelterinprovidingprotectionandin producingandprotectingtheyoung.Thatresultsintheevolutionofmoreand moreorganismsthatarebetterfittedtotheirenvironments.? ?Eachlivingthingisadaptedtoitswayoflifeinageneralwaybuteach isadaptedespeciallytoitsowndistinctclass.Aplantforexampledepends uponitsrootstofixitselffirmlyandtoabsorbwaterandinorganicchemicals. Itdependsuponitsgreenleavesforusingthesun’senergytomakefoodfrom inorganicchemicals.Thesearegeneraladaptationscommontomostplants.In additiontherearespecialadaptationsthatonlycertainkindsofplants have.??Manyanimalshaveadaptationsthathelpthemescapefrom theirenemies.Someinsectsarehiddenbytheirbodycolororshapeandmany looklikealeaforalittlebranch.Thecoatsofdeerarecoloredtomixwith thesurroundings.Manyanimalshavetheabilitytoremaincompletelystillwhen anenemyisnear.??Organismshaveagreatvarietyofwaysof adapting.Theymayadaptintheirstructurefunctionandgenetics;intheir developmentandproductionoftheyoung;andinotherrespects.Anorganismmay createitsownenvironmentasdowarm-bloodedmammalswhichhavetheability toadjustbodyheatexactlytomaintaintheiridealtemperaturedespitechanging weather.Usuallyadaptationsareanadvantagebutsometimesanorganismisso welladaptedtoaparticularenvironmentthatifconditionschangeitfindsit difficultorimpossibletoreadapttothenew conditions.Itcanbeinferredfromthispassagethatthefeathersofabirdarecolored
TheAsianFluVirus In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusualnumberofinfluenza-likecases.Influenzaissometimescalledfluorasbadcold.Hetookspecimensfromthethroatsofpatientsinhishospitalandwasabletofindthevirusofthisinfluenza. Therearethreemaintypesoftheinfluenzavirus.ThemostimportantofthesearetypesAandBeachofthemhavingseveralsub-groups.WiththeinstrumentsatthehospitalthedoctorrecognizedthattheoutbreakwasduetoavirusgroupAbuthedidnotknowthesub-group.HereportedtheoutbreaktotheWorldHealthOrganizationinGeneva.W.H.0.publishedtheimportantnewsalongsidereportsofasimilaroutbreakinHongKongwhereabout15%-20%ofthepopulationhadbecomeill. AssoonastheLondondoctorsreceivedthepackageofthroatsamplestheybeganthestandardtests.Theyfoundthatbyreproducingitselfataveryhighspeedthevirushadmultipliedmorethanamilliontimeswithintwodays.Continuingtheircarefulteststhedoctorscheckedtheeffectofdrugsusedagainstalltheknownsub-groupsoftypeAvirusonthisvirus.Noneofthemgaveanyprotection.Thisthenwassomethingnew:anewinfluenzavirusagainstwhichthepeopleoftheworldhadnoreadyhelpwhatsoever. Havingisolatedthevirustheywereworkingwiththetwodoctorsnowconductedtestsonsomespeciallyselectedanimalswhichcontractinfluenzainthesamewayashumanbeingsdo.Inashorttimetheusualsignsofthediseaseappeared.Theseexperimentsrevealedthatthenewvirusspreadeasilybutthatitwasnotakiller.ScientistslikegeneralpubliccalleditsimplyAsianflu. Thewordspecimensinpara1means______.
{{*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}}??????? ??????????? ??AdaptationofLivingThings{{/B}}??Certainanimalsand plantsdevelopcharacteristicsthathelpthemcopewiththeirenvironments betterthanothersoftheirkind.Thisnaturalbiologicalprocessiscalled adaptation.Amongthesuperiorcharacteristicsdevelopedthroughadaptationare thosethatmayhelpingettingfoodorshelterinprovidingprotectionandin producingandprotectingtheyoung.Thatresultsintheevolutionofmoreand moreorganismsthatarebetterfittedtotheirenvironments.? ?Eachlivingthingisadaptedtoitswayoflifeinageneralwaybuteach isadaptedespeciallytoitsowndistinctclass.Aplantforexampledepends uponitsrootstofixitselffirmlyandtoabsorbwaterandinorganicchemicals. Itdependsuponitsgreenleavesforusingthesun’senergytomakefoodfrom inorganicchemicals.Thesearegeneraladaptationscommontomostplants.In additiontherearespecialadaptationsthatonlycertainkindsofplants have.??Manyanimalshaveadaptationsthathelpthemescapefrom theirenemies.Someinsectsarehiddenbytheirbodycolororshapeandmany looklikealeaforalittlebranch.Thecoatsofdeerarecoloredtomixwith thesurroundings.Manyanimalshavetheabilitytoremaincompletelystillwhen anenemyisnear.??Organismshaveagreatvarietyofwaysof adapting.Theymayadaptintheirstructurefunctionandgenetics;intheir developmentandproductionoftheyoung;andinotherrespects.Anorganismmay createitsownenvironmentasdowarm-bloodedmammalswhichhavetheability toadjustbodyheatexactlytomaintaintheiridealtemperaturedespitechanging weather.Usuallyadaptationsareanadvantagebutsometimesanorganismisso welladaptedtoaparticularenvironmentthatifconditionschangeitfindsit difficultorimpossibletoreadapttothenew conditions.Theauthorcitesthebehaviorofwarm-bloodedmammalsinordertoshowthatalivingthingmayhavetheability
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}??????? ????????FDA:HumanAnimalWaste ThreatensProduce{{/B}}??Thebiggestfoodsafetyriskforfresh fruitsandvegetablesastheyaregrownpickedorprocessedcomesfromhuman andanimalwastetheUSFoodandDrugAdministrationFDAsaid Friday.??Morethan9000Americansdieeachyearfromfood-borne diseasesandsomescientistsbelievefreshproduceisthebiggestcarrierof contamination.??TheFDAissuedasetofdraftguidelinesforUS andforeigngrowerstocarefullymonitorworkerhygienewaterqualitymanure managementandtransportation.??This34-pagedraftguidelines urgedgrowerstogiveworkerslessonsonbasichygienesuchasUsingsoapto washtheirhandscoveringwoundsthatcouldcomeintocontactwithproduceand usingonlycleantoilets.??TheFDAguidelinesidentifiedthe majorsourceofcontaminationforfreshproduceashumanoranimal feces.??Wethinkjustpropercontrolsandproperattentionto detailwouldmakeabigdifferenceinfoodsafetysaidanFDAofficial.Itis ourbeliefthattheseguidelineswouldnotbeverycostly.??But growergroupsdisagreedwiththeFDA’sassessment.Mostfood-bornedisease outbreaksthathappenfurtherdownthedistributionlinearedueto contaminationbecausepeoplepreparingfoodarenotproperlywashingtheir handssaidStaceyZawalanofficialwithUnitedFreshFruitandVegetable Association.Thatisnotnecessarilytrueforgrowersandpackers.? ?SomeUSgrowerorganizationshaveexpressedconcernthattheagencyis interferingwithon-farmpractices.8OthersobjecttotheFDA’sproposalto havegrowersformallydocumentthepickinghandlingandtransportationof producesothathealthofficialscouldquicklyrecallfoodsif necessary.??ConsumergroupscriticizedtheFDAguidelinesasof littleusebecausetheywillnotcarrytheforceoflawtoButstricter regulationscouldevolveasresearchersfindnewtechnologyormethodstokill harmfulbacteriaorparasitestheFDAsaid.??TheFDA recommendationsareduetobemadefinalbytheFDAlaterthisyearforuseby USandforeigngrowers.Thematterofencouragingforeigngrowerstoadoptthe guidelinesremainssomewhattrickybutFDAofficialssayitisvitalbecauseof thehugeamountofimportedproduce.ConsumergroupscriticizedtheFDAguidelinesbecausetheydidn’tthinkthattheseguidelines
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
{{*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}}??????? ??????????? ????????Foodand Cancer{{/B}}??Medicalexpertshavesuspectedformanyyearsthat thereisastronglinkbetweenwhatapersoneatsandcancer.Theysayanew studyprovidesthefirstevidencethatvitaminscouldreduceaperson’schance ofdevelopingcancer.AteamofChineseandAmericanscientistsdidthestudy. TheyarefromAmericanNationalCancerInstituteandtheCancerInstituteofthe ChineseAcademyofMedicalSciencesinBeijing.TheJournaloftheNational CancerInstitutepublishedtheresultsofthestudy.Aboutthirtythousand peoplebetweentheagesof40to69tookpartinthestudy.Theywerefromthe northerncentralChineseareaofLinxian.Mostofthemtookvitaminsand mineralseverydayforfiveyears.??Linxianwaschosenbecause thepeopletherehaveanextremelyhighrateofcancerofstomachandesophagus. Researchersbelievethatfungusandmoldsinlocalfoodsmaybepartly responsibleforthehighcancerrate.Researchersdividedthoseintoeight groups.Sevenofthegroupsreceiveddifferentmixturesofvitaminsandminerals daily.Theamountsofthevitaminsandmineralswere1to2timesgreaterthan whatAmericanhealthofficialssayisneeded.Theeighthgroupreceivedsugar pillsthathadnoeffect.Thosewhoseemedtogainthemostreceivedamixture ofaformofvitaminAcalledβ-carotenevitaminEandthemineralselenium. Thevitaminandmineralarebelievedtopreventdamagetocellscausedby cancer-causingsubstances.Researchersreporteda13percentdropincancer ratesinthosewhotookβ-carotenevitaminEandselenium.Theyalsofounda10 percentdropinthenumberofdeathscausedbystrokesfromburstingblood vessels.??Scientistswarnthatitistoosoontoknowifthe effectwouldbethesameamongpeopleinothercountries.Theynotethatthe peopleinLinxianeatfoodsthatlacknecessaryvitaminsandminerals.Chinese officialswillcontinuetorecordthehealthrecordsofthepeopleinLinxian formanyyears.Fornowofficialsreportedlyareconsideringusingthe.results ofthestudy.TheywanttofindawaytoimprovethehealthofpeopleinLinxian andothersmalltownsinChina.TherateofcancerofstomachandesophagusinLinxianisthehighestinChina.
HeartAttack IntheUnitedStatesandespeciallyinbigcitiesandruralareastensofthousandsofpeoplewithheartsthatshouldbegood【51】tokeepthemalivedieeachyearforlackofadequatefirstaid.InNewYorkCityforexampleanewstudyhasshownthatonlyonepersonin100outsideofhospitals【52】aftertheheartsuddenlystopspumping.IncontrastinSeattlethesurvival【53】aftersuchheartattacksisoneinfive. Thedifferencecanbetraced【54】theeffectivenessofthechainofsurvivalDr.JosephP.Ornatosaid.Eachlinkinthe【55】mustbestrongenoughformanylivestobe【56】. Thechainbeginswithanimmediatetelephone【57】foremergencyhelpandthestartwithinfourminutesoftheprocessneededforrestartingthe【58】workingbyafamilymemberorbystander旁观者. Itcontinueswiththepromptarrival-------withineight【59】tenminutesofarescuerequippedwithaspecialinstrumentthatcanshocktheheartbacktoanormalrhythm.Anditendswiththeadministration给予实施ofadvanced先进emergencycarebynursestomaintaintheheart’’sabilitytosurviveuntilthedoctorsatthehospitalscantake【60】Whenoneormorelinksinthischainfailorfunctiontooslowlythe【61】ofavictimsurvivingheartattackfallsrapidly.Becauseofwidespreadweaknessesinthechainof【62】expertsinemergencyheartcareestimatethat20000to80000people【63】needlesslyofheartattackeachyearanumbercomparabletothe55000killedannuallyinautomobile【64】. OneexpertsaysSendinganemergencyvehicletoaheartattackvictim【65】thespecialequipmentislikehavingpolicemenwithgunsbutnobullets.Theymayputonagoodshowbuttheylacktheweaponneededtogetthejobdone.
{{*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}}??????? ??????????? ????????Foodand Cancer{{/B}}??Medicalexpertshavesuspectedformanyyearsthat thereisastronglinkbetweenwhatapersoneatsandcancer.Theysayanew studyprovidesthefirstevidencethatvitaminscouldreduceaperson’schance ofdevelopingcancer.AteamofChineseandAmericanscientistsdidthestudy. TheyarefromAmericanNationalCancerInstituteandtheCancerInstituteofthe ChineseAcademyofMedicalSciencesinBeijing.TheJournaloftheNational CancerInstitutepublishedtheresultsofthestudy.Aboutthirtythousand peoplebetweentheagesof40to69tookpartinthestudy.Theywerefromthe northerncentralChineseareaofLinxian.Mostofthemtookvitaminsand mineralseverydayforfiveyears.??Linxianwaschosenbecause thepeopletherehaveanextremelyhighrateofcancerofstomachandesophagus. Researchersbelievethatfungusandmoldsinlocalfoodsmaybepartly responsibleforthehighcancerrate.Researchersdividedthoseintoeight groups.Sevenofthegroupsreceiveddifferentmixturesofvitaminsandminerals daily.Theamountsofthevitaminsandmineralswere1to2timesgreaterthan whatAmericanhealthofficialssayisneeded.Theeighthgroupreceivedsugar pillsthathadnoeffect.Thosewhoseemedtogainthemostreceivedamixture ofaformofvitaminAcalledβ-carotenevitaminEandthemineralselenium. Thevitaminandmineralarebelievedtopreventdamagetocellscausedby cancer-causingsubstances.Researchersreporteda13percentdropincancer ratesinthosewhotookβ-carotenevitaminEandselenium.Theyalsofounda10 percentdropinthenumberofdeathscausedbystrokesfromburstingblood vessels.??Scientistswarnthatitistoosoontoknowifthe effectwouldbethesameamongpeopleinothercountries.Theynotethatthe peopleinLinxianeatfoodsthatlacknecessaryvitaminsandminerals.Chinese officialswillcontinuetorecordthehealthrecordsofthepeopleinLinxian formanyyears.Fornowofficialsreportedlyareconsideringusingthe.results ofthestudy.TheywanttofindawaytoimprovethehealthofpeopleinLinxian andothersmalltownsinChina.AmongthescientiststhatdidthestudytherearemoreChinesethanAmericans.
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