首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
Humans are peculiar as a species, so what makes them so must be hidden in their genome. To an almost...
查看本题答案
包含此试题的试卷
国家统考科目《相同项单选集》真题及答案
点击查看
你可能感兴趣的试题
Integrationistheprocessofverifyingthatthecomponent
trying
checklng
testing
coding
在METAR/SPECI中何时开始报告跑道视程
在METAR/SPECI中主导能见度应按照什么增量等级来报告
什么时候在观测记录簿记录BRICFUHZDU和SADRSA除外?什么时候才在METAR 或者SPEC
当主导能见度演变到时应在纪要栏记录其演变过程
＜本场运行最低标准
＜本场SPECI报告标准中的最大值
＜本场特殊观测标准中的最小值
≤本场SPECI报告标准中的最大值
什么时候在观测记录簿记录BRICFUHZDU和SADRSA除外什么时候才在METAR或SPECI报中
在METAR/SPECI中何时编报NSC
什么时候在观测记录簿记录MIFGBCFGPRFG什么时候在METAR或SPECI报中编报这些天气现象
SPECI和SPECAL电报的区别.
当主导能见度演变到本场SPECI报告标准中的最大值时应在纪要栏记录其
在METAR/SPECI报告中强度符号与哪些天气现象结合使用
在METAR/SPECI中按顺时针方向报告风向变化的两个极端方向的条件
描述在METARA/SPECI中跑道视程分段编报的规定
在METAR/SPECI中VC可与那些天气现象结合使用
METAR/SPECI中符合哪些规定时应当编报为VRB
机场气象台站应当通过或者其他有效手段将本机场天气报告METAR和SPECI发往本地区气象中心和民航气
民航地区气象中心应当收集本地区民用机场的机场天气报告METAR和SPECI并编辑
凡某层云量且其云高本场SPECI报告标准中的最大值时应在纪要栏内记录云的演变情况
趋势预报必须附在该机场的后
METAR和SPECI
ROFOR
TAF
日常航空天气报告是
TAF
ROFOR
METAR
SPECI
热门试题
更多
已知A=α1α2α3β和B=α1α2α3γ都是4阶矩阵．其中α1α2α3βγ均为4维列向量且|A|=2|B|=-3．则|2A+B|=______.
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 14
Painunfortunatelyisahorriblenecessityoflife.Itprotectspeoplebyalertingthemtothingsthatmightinjurethem.Butsomelong-termpainhasnothingtodowithanyobviousinjury.Oneestimatesuggeststhatoneinsixadultssufferfromachronicpaincondition.SteveMcMahonapainresearcheratKing’sCollegeLondonsaysthatifskinisdamagedforinstancewithahotironanareaofsensitivitydevelopsaroundtheoutsideoftheburnwherealthoughuntouchedandundamagedbytheironthebehaviorofthenervefibersisdisrupted.Asaresultheightenedsensitivityandabnormalpainsensationsoccurinthesurroundingskin.Chronicpainhesaysmaysimilarlybecausednotbydamagetothebodybutbecauseweakpainsignalsbecomeamplified.Thiswouldalsohelpexplainwhychronicpainssuchaslower-backpainandosteoarthritisfailtorespondwelltotraditionalpaintherapies.ButnowanentirelynewkindofdrugcalledTanezumabhasbeendeveloped.ItisanantibodyforaproteincallednervegrowthfactorNGFwhichisvitalfornewnervegrowthduringdevelopment.NGFitturnsoutisalsocrucialintheregulationofthesensitisationofpaininchronicconditions.KennethVerburgoneoftheresearchersinvolvedinthedevelopmentofTanezumabatPfizersaysitisnotexactlyclearwhatroleNGFplaysinnormalphysiologybutafteraninjurywhichinvolvestissuedamageandinflammationlevelsofNGFincreasedramatically.NGFseemstobeinvolvedintransmittingthepainsignal.AsaconsequenceblockingNGFreduceschronicpain.Tanezumabmuststillcompletethefinalstagesofclinicaltrialsbeforeitcanbecomeaweaponinthetoolkitforreducinghumansuffering.Butunexpectedpainsdonotalwayscomefromthebody.AccordingtoIreneTraceyapainresearcherattheUniversityofOxfordhowpainisexperiencedalsodependsuponaperson’sstateofmind.Ifsuccessivepatientssufferthesameburntheextenttowhichithurtswilldependonwhetheroneisanxiousdepressedhappyordistracted.Suchideasarebeingexploredwithbrainscanswhichsuggestthatevenifalowlevelofpainisbeingsenttothebrainthesignalcanbeturnedupbytheminditself.Indeedpatientscanevenbetrickedintofeelingpain.Inoneexperimentvolunteersweregivenapowerfulanalgesicandsubjectedtoapainfulstimulus—whichbecauseoftheanalgesictheycouldnotfeel.Thentheyweretoldthedrughadwornoffalthoughithadnotandsubsequentlycomplainedthatthestimulushurt.Peoplecanthereforefeelpainsimplybecauseitisexpected.Theycanfailtofeelpainforexactlythesamereasonsforexamplewhentheyaregivenplacebosoraredistracted.Butalthoughpainmaybesubjectivethatdoesnotmeanthefinalexperienceiscontrolledsolelybythemind.ArecentpaperinProceedingsoftheNationalAcademyofScienceshasshownthatgenesplayaroleindeterminingsensitivitytopain.OnegeneknownasSCN9Acodesforaproteinthatallowsthechannelsalongwhichnervesignalsaretransmittedtoremainactiveforlongerandthustransmitmorepainsignals.Itseemslikelythatthisproteinwillattractagreatdealmoreanalgesicresearch.VariationsinSCN9Amayalsoexplainwhysomepatientspreferdifferentclassesofpainkillers.Althoughpainmaybeahorriblenecessitythereisnodoubtthathumanitycouldcopewithfarlessofthechronicsort.Understandinghowthemindthebodyandpeople’sgenesinteracttocausepainshouldbringmorerelief.ThewordthatSteveMcMahonsaysismentionedto______.
EarlierthismonththeheadofPeoplefortheEthicalTreatmentofAnimalsanon-profitorganisationwrotetoGoldmanSachs.Animalsheltersthelettersaidarestrugglingtocopewithasurgeinthenumberofpetsthathavebeenabandonedbecausetheirownershavefallenonhardtimes.MaybeGoldmanexecutivesshouldgivetheirbigbonusestothedogsSadlyitlooksunlikely.Asthenumberofjoblossesandforeclosureshasmountedoverthepasttwoyearssomepeoplehavechosentosurrendertheiranimalsunabletoaffordpetfoodletaloneveterinarycare.Manyhavebroughttheirdogsandcatstoshelters.Somehavebeenlesskindchainingthemtofencesorlockingtheminsidetheirforeclosedhomes.OnekittenwasevenleftinamailboxinBoston.Lookingafterthesepetsisbecomingmorechallengingbecausemanysheltersrelyongovernmentmoneyandhaveseentheirfundingcut.AnimalCareandControlofNewYorkCityforexamplesawitsgrantfallbyover$750000thisfiscalyeararound7%ofitsoperatingbudget.Fewerpeoplearecomingforwardtomakedonations.Somenon-profitsaretryingtostepinandencouragepeoplenottoabandontheirfurryfriendsatsheltersinthefirstplace.Pet-foodbankswhichgivepetfoodtopeopleinneedhavesprungupacrossthecountry.TheHumaneSocietyoftheUnitedStatesestimatesthataround6m～8mcatsanddogsendupinshelterseachyear.Onlyhalfareadopted.Therestareputdown.Thereissomeconcernthatevenmorearebeingputtosleepnowbecausesheltersdonothavethespaceormoneytokeepaliveanimalsthathavenotbeenadopted.Fewerpeoplearecomingforwardtoadoptaswellpresumablybecausetheycannotaffordto.Onenon-profitorganisationPilots’NPawsconnectspilotstoshelterswithdogsthathavenotfoundhomes.Thepilotsvolunteertoflythemtootherstatesgivingthemasecondchanceatadoption.TheInternetisplayingitspart.OneorganisationForeclosurePets.orgrunsanonlinebillboardthatallowspeoplefacingforeclosuretofindahomefortheirpets.Adopt-a-pet.comusesitswebsitetohelpsheltersadvertiseandsende-mailalertswhencertaintypesofanimalscomein.Bytheendof20098500animalshelterswereusingthesitetopostadoptionlistingsfor140000petsupfrom6800sheltersand98000listingsatthebeginningoftheyear.Nowallthatisneededis140000goodhomes.Accordingtothetextwecaninferthat______.
设f’’x在[01]上连续且f0=f1=0求证
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 4
设n为正整数则______.
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 8
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 16
EarlierthismonththeheadofPeoplefortheEthicalTreatmentofAnimalsanon-profitorganisationwrotetoGoldmanSachs.Animalsheltersthelettersaidarestrugglingtocopewithasurgeinthenumberofpetsthathavebeenabandonedbecausetheirownershavefallenonhardtimes.MaybeGoldmanexecutivesshouldgivetheirbigbonusestothedogsSadlyitlooksunlikely.Asthenumberofjoblossesandforeclosureshasmountedoverthepasttwoyearssomepeoplehavechosentosurrendertheiranimalsunabletoaffordpetfoodletaloneveterinarycare.Manyhavebroughttheirdogsandcatstoshelters.Somehavebeenlesskindchainingthemtofencesorlockingtheminsidetheirforeclosedhomes.OnekittenwasevenleftinamailboxinBoston.Lookingafterthesepetsisbecomingmorechallengingbecausemanysheltersrelyongovernmentmoneyandhaveseentheirfundingcut.AnimalCareandControlofNewYorkCityforexamplesawitsgrantfallbyover$750000thisfiscalyeararound7%ofitsoperatingbudget.Fewerpeoplearecomingforwardtomakedonations.Somenon-profitsaretryingtostepinandencouragepeoplenottoabandontheirfurryfriendsatsheltersinthefirstplace.Pet-foodbankswhichgivepetfoodtopeopleinneedhavesprungupacrossthecountry.TheHumaneSocietyoftheUnitedStatesestimatesthataround6m～8mcatsanddogsendupinshelterseachyear.Onlyhalfareadopted.Therestareputdown.Thereissomeconcernthatevenmorearebeingputtosleepnowbecausesheltersdonothavethespaceormoneytokeepaliveanimalsthathavenotbeenadopted.Fewerpeoplearecomingforwardtoadoptaswellpresumablybecausetheycannotaffordto.Onenon-profitorganisationPilots’NPawsconnectspilotstoshelterswithdogsthathavenotfoundhomes.Thepilotsvolunteertoflythemtootherstatesgivingthemasecondchanceatadoption.TheInternetisplayingitspart.OneorganisationForeclosurePets.orgrunsanonlinebillboardthatallowspeoplefacingforeclosuretofindahomefortheirpets.Adopt-a-pet.comusesitswebsitetohelpsheltersadvertiseandsende-mailalertswhencertaintypesofanimalscomein.Bytheendof20098500animalshelterswereusingthesitetopostadoptionlistingsfor140000petsupfrom6800sheltersand98000listingsatthebeginningoftheyear.Nowallthatisneededis140000goodhomes.Lookingafterthepetsisbecomingmorechallengingforthefollowingreasonsexceptthat____.
设fx和gx在[01]上连续在01内可导f0=f1=-1．试证至少存在一点e∈01使f′ξ+g′ξ[fξ-ξ]=1．
Atworkasinlifeattractivewomengetalotofthebreaks.Studieshaveshownthattheyaremorelikelytobepromotedthantheirplain-Janecolleagues.Becausepeopletendtoprojectpositivetraitsontothemsuchassensitivityandpoisetheymayalsobeatanadvantageinjobinterviews.Theonlydownsidetohotnessishavingtofendoffghastlymalecolleagues;orsomanypeoplethink.ButresearchbytwoIsraelissuggestsotherwise.BradleyRuffleatBen-GurionUniversityandZe’evShtudineratArielUniversityCentrelookedatwhathappenswhenjobhuntersincludephotoswiththeircurriculavitaeasisthenorminmuchofEuropeandAsia.Thepairsentfictionalapplicationstoover2500real-lifevacancies.Foreachjobtheysenttwoverysimilarrésumésonewithaphotoonewithout.Subjectshadpreviouslybeengradedfortheirattractiveness.Formentheresultswereasexpected.Hunksweremorelikelytobecalledforaninterviewiftheyincludedaphoto.Uglymenwerebetteroffnotincludingone.Howeverforwomenthiswasreversed.Attractivefemaleswerelesslikelytobeofferedaninterviewiftheyincludedamugshot.Whenapplyingdirectlytoacompanyratherthanthroughanagencyanattractivewomanwouldneedtosendout11CVsonaveragebeforegettinganinterview;anequallyqualifiedplainonejustseven.AtfirstMrRuffleconsideredwhathecallsthedumb-blondehypothesis—thatpeopleassumebeautifulwomentobestupid.Howeverthephotoshadalsobeenratedonhowintelligentpeoplethoughteachsubjectlooked;therewasnocorrelationbetweenperceivedintellectandpulchritude.Sothecauseofthediscriminationmustlieelsewhere.Humanresourcesdepartmentstendtobestaffedmostlybywomen.IndeedintheIsraelistudy93%ofthosetaskedwithselectingwhomtoinviteforaninterviewwerefemale.Theresearchers’unavoidable—andunpleasant—conclusionisthatold-fashionedjealousyledthewomentodiscriminateagainstprettycandidates.SoshouldattractivewomensimplyattachphotosthatmakethemlookdowdyNo.BettersaysMrRuffletodiscouragethepracticeofincludingaphotoaltogether.CompaniesmightevenconsidertheanonymousmodelusedintheBelgianpublicsectorwhereCVsdonotevenincludethecandidate’sname.ItcanbeinferredfromParagraph3that______.
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 6
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 10
Atworkasinlifeattractivewomengetalotofthebreaks.Studieshaveshownthattheyaremorelikelytobepromotedthantheirplain-Janecolleagues.Becausepeopletendtoprojectpositivetraitsontothemsuchassensitivityandpoisetheymayalsobeatanadvantageinjobinterviews.Theonlydownsidetohotnessishavingtofendoffghastlymalecolleagues;orsomanypeoplethink.ButresearchbytwoIsraelissuggestsotherwise.BradleyRuffleatBen-GurionUniversityandZe’evShtudineratArielUniversityCentrelookedatwhathappenswhenjobhuntersincludephotoswiththeircurriculavitaeasisthenorminmuchofEuropeandAsia.Thepairsentfictionalapplicationstoover2500real-lifevacancies.Foreachjobtheysenttwoverysimilarrésumésonewithaphotoonewithout.Subjectshadpreviouslybeengradedfortheirattractiveness.Formentheresultswereasexpected.Hunksweremorelikelytobecalledforaninterviewiftheyincludedaphoto.Uglymenwerebetteroffnotincludingone.Howeverforwomenthiswasreversed.Attractivefemaleswerelesslikelytobeofferedaninterviewiftheyincludedamugshot.Whenapplyingdirectlytoacompanyratherthanthroughanagencyanattractivewomanwouldneedtosendout11CVsonaveragebeforegettinganinterview;anequallyqualifiedplainonejustseven.AtfirstMrRuffleconsideredwhathecallsthedumb-blondehypothesis—thatpeopleassumebeautifulwomentobestupid.Howeverthephotoshadalsobeenratedonhowintelligentpeoplethoughteachsubjectlooked;therewasnocorrelationbetweenperceivedintellectandpulchritude.Sothecauseofthediscriminationmustlieelsewhere.Humanresourcesdepartmentstendtobestaffedmostlybywomen.IndeedintheIsraelistudy93%ofthosetaskedwithselectingwhomtoinviteforaninterviewwerefemale.Theresearchers’unavoidable—andunpleasant—conclusionisthatold-fashionedjealousyledthewomentodiscriminateagainstprettycandidates.SoshouldattractivewomensimplyattachphotosthatmakethemlookdowdyNo.BettersaysMrRuffletodiscouragethepracticeofincludingaphotoaltogether.CompaniesmightevenconsidertheanonymousmodelusedintheBelgianpublicsectorwhereCVsdonotevenincludethecandidate’sname.Thereasonwhyprettywomencandidatesareoftendiscriminatedisthat______.
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 12
设fxy有二阶连续导数gxy=fexyx2+y2且证明gxy在00取得极值判断此极值是极大值还是极小值并求出此极值．
Painunfortunatelyisahorriblenecessityoflife.Itprotectspeoplebyalertingthemtothingsthatmightinjurethem.Butsomelong-termpainhasnothingtodowithanyobviousinjury.Oneestimatesuggeststhatoneinsixadultssufferfroma"chronicpain"condition. SteveMcMahonapainresearcheratKing’sCollegeLondonsaysthatifskinisdamagedforinstancewithahotironanareaofsensitivitydevelopsaroundtheoutsideoftheburnwherealthoughuntouchedandundamagedbytheironthebehaviorofthenervefibersisdisrupted.Asaresultheightenedsensitivityandabnormalpainsensationsoccurinthesurroundingskin.Chronicpainhesaysmaysimilarlybecausednotbydamagetothebodybutbecauseweakpainsignalsbecomeamplified. Thiswouldalsohelpexplainwhychronicpainssuchaslower-backpainandosteoarthritisfailtorespondwelltotraditionalpaintherapies.ButnowanentirelynewkindofdrugcalledTanezumabhasbeendeveloped.ItisanantibodyforaproteincallednervegrowthfactorNGFwhichisvitalfornewnervegrowthduringdevelopment.NGFitturnsoutisalsocrucialintheregulationofthesensitisationofpaininchronicconditions. KennethVerburgoneoftheresearchersinvolvedinthedevelopmentofTanezumabatPfizersaysitisnotexactlyclearwhatroleNGFplaysinnormalphysiologybutafteraninjurywhichinvolvestissuedamageandinflammationlevelsofNGFincreasedramatically.NGFseemstobeinvolvedintransmittingthepainsignal.AsaconsequenceblockingNGFreduceschronicpain. Tanezumabmuststillcompletethefinalstagesofclinicaltrialsbeforeitcanbecomeaweaponinthetoolkitforreducinghumansuffering.Butunexpectedpainsdonotalwayscomefromthebody.AccordingtoIreneTraceyapainresearcherattheUniversityofOxfordhowpainisexperiencedalsodependsuponaperson’sstateofmind.Ifsuccessivepatientssufferthesameburntheextenttowhichithurtswilldependonwhetheroneisanxiousdepressedhappyordistracted. Suchideasarebeingexploredwithbrainscanswhichsuggestthatevenifalowlevelofpainisbeingsenttothebrainthesignalcanbeturnedupbythe"mind"itself.Indeedpatientscanevenbetrickedintofeelingpain. Inoneexperimentvolunteersweregivenapowerfulanalgesicandsubjectedtoapainfulstimulus—whichbecauseoftheanalgesictheycouldnotfeel.Thentheyweretoldthedrughadwornoffalthoughithadnotandsubsequentlycomplainedthatthestimulushurt. Peoplecanthereforefeelpainsimplybecauseitisexpected.Theycanfailtofeelpainforexactlythesamereasonsforexamplewhentheyaregivenplacebosoraredistracted.Butalthoughpainmaybesubjectivethatdoesnotmeanthefinalexperienceiscontrolledsolelybythemind. ArecentpaperinProceedingsoftheNationalAcademyofScienceshasshownthatgenesplayaroleindeterminingsensitivitytopain.OnegeneknownasSCN9Acodesforaproteinthatallowsthechannelsalongwhichnervesignalsaretransmittedtoremainactiveforlongerandthustransmitmorepainsignals.Itseemslikelythatthisproteinwillattractagreatdealmoreanalgesicresearch.VariationsinSCN9Amayalsoexplainwhysomepatientspreferdifferentclassesofpainkillers. Althoughpainmaybeahorriblenecessitythereisnodoubtthathumanitycouldcopewithfarlessofthechronicsort.Understandinghowthemindthebodyandpeople’sgenesinteracttocausepainshouldbringmorerelief. AccordingtothetextTanezumabis
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 18
设在全平面上有则在下列条件中使fx1y1＜fx2y2成立的是______
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 2
设齐次线性方程组其中a≠0b≠0n≥2．试讨论ab为何值时方程组仅有零解有无穷多组解在有无穷多组解时求出全部解并用基础解系表示全部解．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 20
Painunfortunatelyisahorriblenecessityoflife.Itprotectspeoplebyalertingthemtothingsthatmightinjurethem.Butsomelong-termpainhasnothingtodowithanyobviousinjury.Oneestimatesuggeststhatoneinsixadultssufferfromachronicpaincondition.SteveMcMahonapainresearcheratKing’sCollegeLondonsaysthatifskinisdamagedforinstancewithahotironanareaofsensitivitydevelopsaroundtheoutsideoftheburnwherealthoughuntouchedandundamagedbytheironthebehaviorofthenervefibersisdisrupted.Asaresultheightenedsensitivityandabnormalpainsensationsoccurinthesurroundingskin.Chronicpainhesaysmaysimilarlybecausednotbydamagetothebodybutbecauseweakpainsignalsbecomeamplified.Thiswouldalsohelpexplainwhychronicpainssuchaslower-backpainandosteoarthritisfailtorespondwelltotraditionalpaintherapies.ButnowanentirelynewkindofdrugcalledTanezumabhasbeendeveloped.ItisanantibodyforaproteincallednervegrowthfactorNGFwhichisvitalfornewnervegrowthduringdevelopment.NGFitturnsoutisalsocrucialintheregulationofthesensitisationofpaininchronicconditions.KennethVerburgoneoftheresearchersinvolvedinthedevelopmentofTanezumabatPfizersaysitisnotexactlyclearwhatroleNGFplaysinnormalphysiologybutafteraninjurywhichinvolvestissuedamageandinflammationlevelsofNGFincreasedramatically.NGFseemstobeinvolvedintransmittingthepainsignal.AsaconsequenceblockingNGFreduceschronicpain.Tanezumabmuststillcompletethefinalstagesofclinicaltrialsbeforeitcanbecomeaweaponinthetoolkitforreducinghumansuffering.Butunexpectedpainsdonotalwayscomefromthebody.AccordingtoIreneTraceyapainresearcherattheUniversityofOxfordhowpainisexperiencedalsodependsuponaperson’sstateofmind.Ifsuccessivepatientssufferthesameburntheextenttowhichithurtswilldependonwhetheroneisanxiousdepressedhappyordistracted.Suchideasarebeingexploredwithbrainscanswhichsuggestthatevenifalowlevelofpainisbeingsenttothebrainthesignalcanbeturnedupbytheminditself.Indeedpatientscanevenbetrickedintofeelingpain.Inoneexperimentvolunteersweregivenapowerfulanalgesicandsubjectedtoapainfulstimulus—whichbecauseoftheanalgesictheycouldnotfeel.Thentheyweretoldthedrughadwornoffalthoughithadnotandsubsequentlycomplainedthatthestimulushurt.Peoplecanthereforefeelpainsimplybecauseitisexpected.Theycanfailtofeelpainforexactlythesamereasonsforexamplewhentheyaregivenplacebosoraredistracted.Butalthoughpainmaybesubjectivethatdoesnotmeanthefinalexperienceiscontrolledsolelybythemind.ArecentpaperinProceedingsoftheNationalAcademyofScienceshasshownthatgenesplayaroleindeterminingsensitivitytopain.OnegeneknownasSCN9Acodesforaproteinthatallowsthechannelsalongwhichnervesignalsaretransmittedtoremainactiveforlongerandthustransmitmorepainsignals.Itseemslikelythatthisproteinwillattractagreatdealmoreanalgesicresearch.VariationsinSCN9Amayalsoexplainwhysomepatientspreferdifferentclassesofpainkillers.Althoughpainmaybeahorriblenecessitythereisnodoubtthathumanitycouldcopewithfarlessofthechronicsort.Understandinghowthemindthebodyandpeople’sgenesinteracttocausepainshouldbringmorerelief.Whatisthebesttitleforthistext
求极限
设X1X2Xn为来自总体X的简单随机样本而x～B1p0＜p＜1记和．试求ⅠX的概率分布ⅡⅢET的值．
证明方程2x=x2+1有且仅有三个实根．
设Ω为区域x2+y2+z2≤1则______．
设A是各行元素之和均为0的三阶矩阵αβ是线性无关的三维列向量并满足Aα=3βAβ=3α．Ⅰ证明矩阵A和对角矩阵相似Ⅱ如α=0-11Tβ=10-1T求矩阵AⅢ用配方法化二次型xTAx为标准形并写出所用坐标变换．
求所有0+∞上的正连续函数gx使得对任意x＞0有
热门题库
更多
国家统考科目
香港法概论
反间谍法
__学
合同法
证据学
民事诉讼法学
民法学
刑法学
消费者权益保护法
法理学
竞争法
国际公法
国际经济法
农村政策法规
行政法与行政诉讼法
湘公网安备 43130202000226号