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一般情况下，动脉舒张压主要反映（）
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一般情况下动脉舒张压主要反映的是
心脏搏出量
心率
外周阻力
静脉容量
循环血量
在一般情况下收缩压高低主要反映__舒张压高低主要反映__
一般情况下舒张压的高低主要反映
心率
外周阻力
循环血量
每搏输出量
主动脉管壁弹性
一般情况下舒张压的高低主要反映
每搏输出量的多少
每分输出量的多少
外周阻力的大小
大动脉弹性的高低
一般情况下动脉舒张压主要反映
心脏搏出量
心率
外周阻力
大动脉顺应性
循环血量(107,108/2005)
一般情况下舒张压的高低主要反映
心肌收缩力
外周阻力
每搏输出量
大动脉弹性
循环血量
一般情况下舒张压的高低主要反映
心肌收缩力
外周阻力
每搏输出量
大动脉弹性
循环血量
在一般情况下舒张压的高低主要反映__的大小
在一般情况下收缩压的高低主要反映心脏__的多少而舒张压的高低主要反映__的大小
在一般情况下收缩压的高低主要反映____________的大小舒张压的高低主要反映 ________
一般情况下舒张压的高低主要反映
每搏输出量的多少
每分输出量的多少
外周阻力的大小
大动脉弹性的高低
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心细胞有效不应期特别长的生理意义是
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夜间阵发性呼吸困难发生的机理与下列哪项关系不大
[A]Thenextlogicalstepistoautomatethephysicalprocessofcutting thediamondandDrHoldenseemstohavefoundtheidealpartner.Heistalking toCalibratedDiamonds.acompanybasedinJohannesburgSouthAfrica.about combininghisoptimisationtechniqueswithanadvancedlaser-cuttingsystem. Traditionallydiamondsarecutandpolishedusingotherdiamonds.Butmrecent yearslasershavebeenintroducedtomakeroughcutsandmcarryout brutingthebevellingprocessusedtogivediamondstheir characteristicsharp-edgedshapes.JohnBond.thefounderofCalibrated Diamondssayshislaser-cuttingmethodcanmakemuchmoreprecisecutsandcan evenpolishdiamondsthoughheisreluctanttoexplainhowitworks.He believesthatcombininghislaser-cuttingwithDrHolden’ssoftwareand automatingthewholeprocesscouldbothreducewastedramaticallyandcutthe turnaroundtimefrommonthstodays.Currentlypeoplearelosingupto70%of thediamond.hesays.[B]Forover600yearslapidaristsorstone-cutters havebeenusingessentiallythesametechniquestocutdiamondsanddetermine theirvaluesaysDrHolden.Thereisagreatneedforautomationhesays—a sentimentechoedwithintheindustry.TheGemologicalInstituteofAmericafor exampleisdevisingsoftwaretoenableretailersandconsumerstocompare diamondsofdifferentcutsbygradingthecutautomatically.[C]Inactual usethesystemisfedmodelsofgemstoneswhichareproducedbyscanningthe. stonesusingadesktopX-raytomographymachine.Whenastoneisidentifiedasa borderlinecasebetweentwogradesthesystemusesanoptimisationtechnique calledageneticalgorithmtoexplorethedifferentwaysinwhichthestone couldbecuttomaximiseitsvalue.Sometimesbiggerisnotnecessarilybetter: removingImperfectionsknownasinclusionsmayreducethesizeandcaratageof astonebutcouldalsoelevateittoamorevaluablegrade.TestsofiGem showedthatitcouldincreasethevalueofaroughstonebyasmuchas 23%.[D]Evenasmallimprovementcanyieldasignificantincreaseinvalue saysDrHolden.whospecialisesinapplyingtechnologytoimprove decision-makinginbusiness.TogetherWithhiscolleagueMateeSerearuno.hehas developedanoptimisationsystemcallediGem.Besidesautomaticallyworkingout thegradeofaroughdiamonditalsosuggestshowbesttocatitinorderto maximisethevalueoftheresultingstones.[E]MrBondhopesthatthis combinationoftechnologieswillhelphishomecontinenttobenefitmorefrom itsnaturalwealth.Morethan60%oftheworld’sroughdiamondscomefrom Africahesaysbutalackofexpertiseandrelativelyhighlabourcostsmeans thatthestonesareusuallyshippedoverseastocountriessuchasIndiafor assessmentandcutting.Hehopestohavehisfirstfactoryupandrunninglater thisyear.[F]Thesystemusesasetofrolesdistilledfromthejudgments offourdiamondexpertsmdeterminetheclarityandhencethegradeofeach stone.Eachexpertwasaskedtoclassify503differentvirtual stones--computermodelsofstonescontainingdifferentWivesofflaws.The experts’verdictswerethenboileddownintoasetofrulessothatwhenanew gemstoneispresentedtothesystemitcandeterminehowtheexpertswould probablyhavegradedit.Datafrommoreexpertscouldhavebeenusedbutfour provedtobeenoughtoproducearobustandaccuratesystemsaysDr Holden.[G]Whileadiamondmaybeforeveritsvalueisfarfromsetin stone.ItdependsonthefourCs:caratcutcolourandclarity.Butwhilethe firstthreecanbemeasuredobjectivelyassessingadiamond’sclarityinvolves acertainamountofsubjectivityandcanleaveexpertsdisagreeingaboutthe grade—andhencethevalue—ofastone.NowresearchersatCambridgeUniversity’s InstituteforManufacturingclaimmhavedevisedawaytomakethegradingof diamondsandotherpreciousstonesmoreconsistent.TonyHoldentheproject’s leadersaysautomatingthisprocesscoulddomorethanjustloadmmore accuratevaluations.Itcouldalsomakeroughstonesmorevaluablebyreducing theamountofwasteduringcutting.Order:
低钾血症患者补钾速度一般不宜超过
隐性肝性脑病病人的临床特点是
心房颤动发生后至少可使心排血量下降
下述哪项关于梅毒的叙述是正确的
DNA复制时领头链合成全过程中不需要的酶是
WhilemuchoftheattentiononfightingAIDSandotherdiseasesinpoor countrieshasfocusedonaccesstoaffordabledrugsconcernisnowshiftingto thequestionofwhoexactlywilldeliverthem.Unfortunatelythereisa severeshortageofdoctorsnursesandotherhealth-careworkersinthese countries.Accordingtoareportpublishedinthisweek’sLancetbytheJoint LearningInitiativeJLIaninternationalconsortiumofacademiccentresand developmentagenciessub-SaharanAfricahasonlyone-tenththenumberOfnurses anddoctorsperheadofpopulationthatEuropedoesthoughitshealth-care problemsarefarmompressing.47Thereasonsforthisaretw07foldand wellknown—notenoughhealth-careworkersaretrainedinthefastplaceandtoo manyofthosewhoaretrainedthenleaveforbetter-paidjobsintherichworld. Whatthereportdoesistoputsomenumbersontheseproblems. Amere5000doctorsitfindsgraduateinAfricaeachyearathirdof thenumberthatgraduateinAmerica.Only50of600doctorsminedinZambiain recentyearsarestillinthecountry.TherearemoreMalawiandoctorsin ManchesterthanMalawi.48Andmanyrichcountriesexacerbatetheproblem byrecruitingfrompooronestohelpdealwiththeirown shortages.Toovercomeallthis.theJLIreckonsthatthe worldneeds4mmorehealth-careworkersofwhomlmarerequiredinsub-Saharan Africaalone.Thequestionis.whowillpayforthemThereportfloatssome ideas.49Itrecommendsthatroughly$400mor4%oftheoverseasaid currentlyspentonhealth-beearmarkedtohelpbuildupthehealth-care workforceinpoorcountries.50Butitalsosuggeststhatbetterusebe madeofexistingresourcesforexamplebyemployinglocalvolunteersrather thanhighlytraineddoctorsformany.routinematters.AsLincolnChenof HarvardUniversityoneofthereport’sauthorspointsoutafewcountries suchasBrazil.ThailandandIran.havetakenstepsintherightdirection. Othersneedtofollowtheirlead.
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关于胃癌的淋巴转移下列哪项是正确的
通过兴奋中枢化学感受器增强肺通气的有效刺激是
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单腿站立试验Trendelenburgtest是用来检查
治疗肺炎球菌肺炎时首选的抗菌药物是
下列哪项不符合肺结核的化疗原则
甲状腺次全切除术后发生手足抽搐应考虑的诊断是
慢性萎缩性胃窦炎主要与下列哪种致病菌感染有关
[A]Thenextlogicalstepistoautomatethephysicalprocessofcutting thediamondandDrHoldenseemstohavefoundtheidealpartner.Heistalking toCalibratedDiamonds.acompanybasedinJohannesburgSouthAfrica.about combininghisoptimisationtechniqueswithanadvancedlaser-cuttingsystem. Traditionallydiamondsarecutandpolishedusingotherdiamonds.Butmrecent yearslasershavebeenintroducedtomakeroughcutsandmcarryout brutingthebevellingprocessusedtogivediamondstheir characteristicsharp-edgedshapes.JohnBond.thefounderofCalibrated Diamondssayshislaser-cuttingmethodcanmakemuchmoreprecisecutsandcan evenpolishdiamondsthoughheisreluctanttoexplainhowitworks.He believesthatcombininghislaser-cuttingwithDrHolden’ssoftwareand automatingthewholeprocesscouldbothreducewastedramaticallyandcutthe turnaroundtimefrommonthstodays.Currentlypeoplearelosingupto70%of thediamond.hesays.[B]Forover600yearslapidaristsorstone-cutters havebeenusingessentiallythesametechniquestocutdiamondsanddetermine theirvaluesaysDrHolden.Thereisagreatneedforautomationhesays—a sentimentechoedwithintheindustry.TheGemologicalInstituteofAmericafor exampleisdevisingsoftwaretoenableretailersandconsumerstocompare diamondsofdifferentcutsbygradingthecutautomatically.[C]Inactual usethesystemisfedmodelsofgemstoneswhichareproducedbyscanningthe. stonesusingadesktopX-raytomographymachine.Whenastoneisidentifiedasa borderlinecasebetweentwogradesthesystemusesanoptimisationtechnique calledageneticalgorithmtoexplorethedifferentwaysinwhichthestone couldbecuttomaximiseitsvalue.Sometimesbiggerisnotnecessarilybetter: removingImperfectionsknownasinclusionsmayreducethesizeandcaratageof astonebutcouldalsoelevateittoamorevaluablegrade.TestsofiGem showedthatitcouldincreasethevalueofaroughstonebyasmuchas 23%.[D]Evenasmallimprovementcanyieldasignificantincreaseinvalue saysDrHolden.whospecialisesinapplyingtechnologytoimprove decision-makinginbusiness.TogetherWithhiscolleagueMateeSerearuno.hehas developedanoptimisationsystemcallediGem.Besidesautomaticallyworkingout thegradeofaroughdiamonditalsosuggestshowbesttocatitinorderto maximisethevalueoftheresultingstones.[E]MrBondhopesthatthis combinationoftechnologieswillhelphishomecontinenttobenefitmorefrom itsnaturalwealth.Morethan60%oftheworld’sroughdiamondscomefrom Africahesaysbutalackofexpertiseandrelativelyhighlabourcostsmeans thatthestonesareusuallyshippedoverseastocountriessuchasIndiafor assessmentandcutting.Hehopestohavehisfirstfactoryupandrunninglater thisyear.[F]Thesystemusesasetofrolesdistilledfromthejudgments offourdiamondexpertsmdeterminetheclarityandhencethegradeofeach stone.Eachexpertwasaskedtoclassify503differentvirtual stones--computermodelsofstonescontainingdifferentWivesofflaws.The experts’verdictswerethenboileddownintoasetofrulessothatwhenanew gemstoneispresentedtothesystemitcandeterminehowtheexpertswould probablyhavegradedit.Datafrommoreexpertscouldhavebeenusedbutfour provedtobeenoughtoproducearobustandaccuratesystemsaysDr Holden.[G]Whileadiamondmaybeforeveritsvalueisfarfromsetin stone.ItdependsonthefourCs:caratcutcolourandclarity.Butwhilethe firstthreecanbemeasuredobjectivelyassessingadiamond’sclarityinvolves acertainamountofsubjectivityandcanleaveexpertsdisagreeingaboutthe grade—andhencethevalue—ofastone.NowresearchersatCambridgeUniversity’s InstituteforManufacturingclaimmhavedevisedawaytomakethegradingof diamondsandotherpreciousstonesmoreconsistent.TonyHoldentheproject’s leadersaysautomatingthisprocesscoulddomorethanjustloadmmore accuratevaluations.Itcouldalsomakeroughstonesmorevaluablebyreducing theamountofwasteduringcutting.Order:
肝素抗凝血的主要作用机理是
关于P53的叙述哪项是正确的
[A]Thenextlogicalstepistoautomatethephysicalprocessofcutting thediamondandDrHoldenseemstohavefoundtheidealpartner.Heistalking toCalibratedDiamonds.acompanybasedinJohannesburgSouthAfrica.about combininghisoptimisationtechniqueswithanadvancedlaser-cuttingsystem. Traditionallydiamondsarecutandpolishedusingotherdiamonds.Butmrecent yearslasershavebeenintroducedtomakeroughcutsandmcarryout brutingthebevellingprocessusedtogivediamondstheir characteristicsharp-edgedshapes.JohnBond.thefounderofCalibrated Diamondssayshislaser-cuttingmethodcanmakemuchmoreprecisecutsandcan evenpolishdiamondsthoughheisreluctanttoexplainhowitworks.He believesthatcombininghislaser-cuttingwithDrHolden’ssoftwareand automatingthewholeprocesscouldbothreducewastedramaticallyandcutthe turnaroundtimefrommonthstodays.Currentlypeoplearelosingupto70%of thediamond.hesays.[B]Forover600yearslapidaristsorstone-cutters havebeenusingessentiallythesametechniquestocutdiamondsanddetermine theirvaluesaysDrHolden.Thereisagreatneedforautomationhesays—a sentimentechoedwithintheindustry.TheGemologicalInstituteofAmericafor exampleisdevisingsoftwaretoenableretailersandconsumerstocompare diamondsofdifferentcutsbygradingthecutautomatically.[C]Inactual usethesystemisfedmodelsofgemstoneswhichareproducedbyscanningthe. stonesusingadesktopX-raytomographymachine.Whenastoneisidentifiedasa borderlinecasebetweentwogradesthesystemusesanoptimisationtechnique calledageneticalgorithmtoexplorethedifferentwaysinwhichthestone couldbecuttomaximiseitsvalue.Sometimesbiggerisnotnecessarilybetter: removingImperfectionsknownasinclusionsmayreducethesizeandcaratageof astonebutcouldalsoelevateittoamorevaluablegrade.TestsofiGem showedthatitcouldincreasethevalueofaroughstonebyasmuchas 23%.[D]Evenasmallimprovementcanyieldasignificantincreaseinvalue saysDrHolden.whospecialisesinapplyingtechnologytoimprove decision-makinginbusiness.TogetherWithhiscolleagueMateeSerearuno.hehas developedanoptimisationsystemcallediGem.Besidesautomaticallyworkingout thegradeofaroughdiamonditalsosuggestshowbesttocatitinorderto maximisethevalueoftheresultingstones.[E]MrBondhopesthatthis combinationoftechnologieswillhelphishomecontinenttobenefitmorefrom itsnaturalwealth.Morethan60%oftheworld’sroughdiamondscomefrom Africahesaysbutalackofexpertiseandrelativelyhighlabourcostsmeans thatthestonesareusuallyshippedoverseastocountriessuchasIndiafor assessmentandcutting.Hehopestohavehisfirstfactoryupandrunninglater thisyear.[F]Thesystemusesasetofrolesdistilledfromthejudgments offourdiamondexpertsmdeterminetheclarityandhencethegradeofeach stone.Eachexpertwasaskedtoclassify503differentvirtual stones--computermodelsofstonescontainingdifferentWivesofflaws.The experts’verdictswerethenboileddownintoasetofrulessothatwhenanew gemstoneispresentedtothesystemitcandeterminehowtheexpertswould probablyhavegradedit.Datafrommoreexpertscouldhavebeenusedbutfour provedtobeenoughtoproducearobustandaccuratesystemsaysDr Holden.[G]Whileadiamondmaybeforeveritsvalueisfarfromsetin stone.ItdependsonthefourCs:caratcutcolourandclarity.Butwhilethe firstthreecanbemeasuredobjectivelyassessingadiamond’sclarityinvolves acertainamountofsubjectivityandcanleaveexpertsdisagreeingaboutthe grade—andhencethevalue—ofastone.NowresearchersatCambridgeUniversity’s InstituteforManufacturingclaimmhavedevisedawaytomakethegradingof diamondsandotherpreciousstonesmoreconsistent.TonyHoldentheproject’s leadersaysautomatingthisprocesscoulddomorethanjustloadmmore accuratevaluations.Itcouldalsomakeroughstonesmorevaluablebyreducing theamountofwasteduringcutting.Order:`
WhilemuchoftheattentiononfightingAIDSandotherdiseasesinpoor countrieshasfocusedonaccesstoaffordabledrugsconcernisnowshiftingto thequestionofwhoexactlywilldeliverthem.Unfortunatelythereisa severeshortageofdoctorsnursesandotherhealth-careworkersinthese countries.Accordingtoareportpublishedinthisweek’sLancetbytheJoint LearningInitiativeJLIaninternationalconsortiumofacademiccentresand developmentagenciessub-SaharanAfricahasonlyone-tenththenumberOfnurses anddoctorsperheadofpopulationthatEuropedoesthoughitshealth-care problemsarefarmompressing.47Thereasonsforthisaretw07foldand wellknown—notenoughhealth-careworkersaretrainedinthefastplaceandtoo manyofthosewhoaretrainedthenleaveforbetter-paidjobsintherichworld. Whatthereportdoesistoputsomenumbersontheseproblems. Amere5000doctorsitfindsgraduateinAfricaeachyearathirdof thenumberthatgraduateinAmerica.Only50of600doctorsminedinZambiain recentyearsarestillinthecountry.TherearemoreMalawiandoctorsin ManchesterthanMalawi.48Andmanyrichcountriesexacerbatetheproblem byrecruitingfrompooronestohelpdealwiththeirown shortages.Toovercomeallthis.theJLIreckonsthatthe worldneeds4mmorehealth-careworkersofwhomlmarerequiredinsub-Saharan Africaalone.Thequestionis.whowillpayforthemThereportfloatssome ideas.49Itrecommendsthatroughly$400mor4%oftheoverseasaid currentlyspentonhealth-beearmarkedtohelpbuildupthehealth-care workforceinpoorcountries.50Butitalsosuggeststhatbetterusebe madeofexistingresourcesforexamplebyemployinglocalvolunteersrather thanhighlytraineddoctorsformany.routinematters.AsLincolnChenof HarvardUniversityoneofthereport’sauthorspointsoutafewcountries suchasBrazil.ThailandandIran.havetakenstepsintherightdirection. Othersneedtofollowtheirlead.
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下列物质在体内可直接还原生成脱氧腺苷酸的是
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