如下图所示，左边的楼高AB=60m，右边的楼高CD=24m，且BC=30m，地面上的目标 P位于距点C15m处． （1）请画出从A处看地面上距离点C最近的点．这个点与点C之间的距离是多少 （2）从A处能看见目标P吗为什么  

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop. DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13.Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandies!IwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 14

Onedaywhileagirlwaswalkinginthewoodsshefoundtwostarvingsongbirds.Shetookthemhomeandputtheminasmall16Shecaredforthemandfeltgreatloveforthem. Oncethe17andstrongerofthetwobirdsflewfromthecage.Therefore18heflewcloseshegraspedhim19Shefeltgladbutsuddenlyshefeltthebirdgolimp.Sheopenedherhandand20inhorroratthedeadbird. Shenoticedtheotherbirdmovingbackandforthontheedgeofthecage.Shecouldfeelhisgreatneedfor21Sheliftedhimfromthecageand22himsoftlyintotheair.Thebirdcircledoncetwicethreetimes. Thegirlwatcheddelightedlyatthebird’senjoyment.Herheartwasnolonger23withherloss.Suddenlythebirdflewcloserand24softlyonhershoulder.Itsangthesweetestmelodythatshehadeverheard. Thefastestwayto25loveistoholdonittootightlywhilethebestwaytokeeploveistogiveitWINGS! 22.

如果实数xy满足不等式组则x2+y2的最小值是．

课程计划对学校和小学教师的要求有哪些

使不等式sin2x+acosx+a2≥1+cosx对一切x∈R恒成立的负数a的取值范围是______．

求函数y=sinx+1cosx+1的最大值和最小值

理解新信息的意义首先必须获得充分的感性经验其次要对感性经验进行充分的思维加工这是通过______和______两个环节来实现的．

英语课程标准的评价体系要体现评价主体的多元化和评价形式的______

MotherhoodmaymakewomensmarterandmayhelppreventdementiainoldagebybathingthebraininprotectivehormonesUSreseachersreportedonThursday. TestsonratsshowthatthosewhoraisetwoormorelittersofpupsdoconsiderablybetterintestsofmemoryandskillsthanratswhohavenobabiesandtheirbrainsshowchangesthatsuggesttheymaybeprotectedagainstdiseasessuchasAlzheimer’s.UniversityofRichmondpsychologyprofessorCraigKinsleybelieveshisfindingswilltranslateintohumans. OurresearchshowsthatthehormonesofpregnancyareprotectingthebrainincludingestrogenwhichweknowhasmanyneuroprotectiveeffectsKinsleysaid. It’sratdatabuthumansaremammalsjustliketheseanimalsaremammalsheaddedinatelephoneinterview.Theygothroughpregnancyandhormonalchanges. KinsleysaidhehopedpublichealthofficialsandresearcherswilllooktoseeifhavinghadchildrenprotectsawomanfromAlzheimer’sandotherformsofage-relatedbraindecline. WhenpeoplethinkaboutpregnancytheythinkaboutwhathappenstobabiesandthemotherfromtheneckdownsaidKinsleywhopresentedhisfindingstotheannualmeetingoftheSocietyofNeuroscienceinOrlandoFlorida. Theydonotrealizethathormonesarewashingonthebrain.Ifyoulookatfemaleanimalswhohavenevergonethroughpregnancytheyactdifferentlytowardyoung.Butifshegoesthroughpregnancyshewillsacrificeherlifeforherinfant—thatisagreatchangeinherbehaviorthatshowedingeneticalterationstothebrain./ Whatdoesthephraselittersofpupsmeaninthesecondparagraph

设fx是一个多项式对所有实数x有fx[2]+1=x[4]+5x[2]+3．求fx[2]-1．

我国最早以马克思主义观点编写教育学著作的学者是______．

Onedaywhileagirlwaswalkinginthewoodsshefoundtwostarvingsongbirds.Shetookthemhomeandputtheminasmall16Shecaredforthemandfeltgreatloveforthem. Oncethe17andstrongerofthetwobirdsflewfromthecage.Therefore18heflewcloseshegraspedhim19Shefeltgladbutsuddenlyshefeltthebirdgolimp.Sheopenedherhandand20inhorroratthedeadbird. Shenoticedtheotherbirdmovingbackandforthontheedgeofthecage.Shecouldfeelhisgreatneedfor21Sheliftedhimfromthecageand22himsoftlyintotheair.Thebirdcircledoncetwicethreetimes. Thegirlwatcheddelightedlyatthebird’senjoyment.Herheartwasnolonger23withherloss.Suddenlythebirdflewcloserand24softlyonhershoulder.Itsangthesweetestmelodythatshehadeverheard. Thefastestwayto25loveistoholdonittootightlywhilethebestwaytokeeploveistogiveitWINGS! 16.

Everybodydreams.Somepeoplethinkdreamscantellusaboutthefuture.Otherpeoplethinkdreamscantellusaboutourselves.It’slikeour11istalkingtous. Whyaredreams12strangeandhardtounderstandSomepeoplethinkourbrainuses13totalktous.Whenweflyswimorfalldowninourdreamsithasa14meaning.Lotsofdoctorshelppeople15theirdreams.Theyfindthatdreamstellusaboutour16andfears. Thesedaysmanyscientists17thatdreamsareveryimportant.Duringthedaywehavemany18andourbrainreceivesalotofinformation.Whenwedreamourbrain19informationthatisnotimportantandputsthemostimportantinformationintoour20.Aswelearnmoreaboutthebrainwemayfindanswerstoourquestionsaboutdreams. 19.

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandiesIwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 14

Ihavenoone______meforIamanewcomerhere.

他专心研究濒危动物并逐渐习惯了岛上的艰苦生活concentrateon;and;getusedto

五一假期期间某学校计划组织385名师生租车旅游现知道租车公司有42座和60座两种客车42座客车的租金每辆为320元60座客车的租金每辆为460元．1若学校只租用42座客车或者只租用60座客车那么学校各需多少租金2若学校同时租用这两种客车共8辆可以坐不满而且要比单独只租用一种车辆节省租金请你帮助该学校选择一种最节省的租车方案．

在基础教育阶段学习英语应以______为主学习者最主要的终极目标之一是获得______

若函数fx=x2·lna-2x+2在区间12内有且只有一个零点那么实数a的取值范围是．

近朱者赤近墨者黑这句话反映了对人的身心发展的影响

计算

双曲线的离心率为则此双曲线的渐近线方程为．

如图在Rt△ABC中∠ABC=90°P为△ABC所在平面外一点PA⊥平面ABC则四面体P—ABC中共有个直角三角形．

过点A14且横纵截距的绝对值相等的直线共有．

WhichofthefollowingstatementisINCORRECT

数列an满足an+1=an-3n≥1且a1=7则a3的值是______．

由曲线x2=4yx2=-4yx=4x=-4围成的图形绕y轴旋转一周所得旋转体的体积为Vl满足x2+y2≤16x2+y-22≥4x2+y+22≥4的点xy组成的图形绕y轴旋转一周所得旋转体的体积为V2则．

MotherhoodmaymakewomensmarterandmayhelppreventdementiainoldagebybathingthebraininprotectivehormonesUSreseachersreportedonThursday.TestsonratsshowthatthosewhoraisetwoormorelittersofpupsdoconsiderablybetterintestsofmemoryandskillsthanratswhohavenobabiesandtheirbrainsshowchangesthatsuggesttheymaybeprotectedagainstdiseasessuchasAlzheimer’s.UniversityofRichmondpsychologyprofessorCraigKinsleybelieveshisfindingswilltranslateintohumans.OurresearchshowsthatthehormonesofpregnancyareprotectingthebrainincludingestrogenwhichweknowhasmanyneuroprotectiveeffectsKinsleysaid.It’sratdatabuthumansaremammalsjustliketheseanimalsaremammalsheaddedinatelephoneinterview.Theygothroughpregnancyandhormonalchanges.KinsleysaidhehopedpublichealthofficialsandresearcherswilllooktoseeifhavinghadchildrenprotectsawomanfromAlzheimer’sandotherformsofage-relatedbraindecline.WhenpeoplethinkaboutpregnancytheythinkaboutwhathappenstobabiesandthemotherfromtheneckdownsaidKinsleywhopresentedhisfindingstotheannualmeetingoftheSocietyofNeuroscienceinOrlandoFlorida.Theydonotrealizethathormonesarewashingonthebrain.Ifyoulookatfemaleanimalswhohavenevergonethroughpregnancytheyactdifferentlytowardyoung.Butifshegoesthroughpregnancyshewillsacrificeherlifeforherinfant—thatisagreatchangeinherbehaviorthatshowedingeneticalterationstothebrain./Whatcanprotectthebrainofawomanaccordingtothepassage

椭圆2x2+y2=8的焦点坐标是______．

终身教育思想形成于20世纪60年代的欧洲由首先提出

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandiesIwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 8

Onedaywhileagirlwaswalkinginthewoodsshefoundtwostarvingsongbirds.Shetookthemhomeandputtheminasmall16Shecaredforthemandfeltgreatloveforthem. Oncethe17andstrongerofthetwobirdsflewfromthecage.Therefore18heflewcloseshegraspedhim19Shefeltgladbutsuddenlyshefeltthebirdgolimp.Sheopenedherhandand20inhorroratthedeadbird. Shenoticedtheotherbirdmovingbackandforthontheedgeofthecage.Shecouldfeelhisgreatneedfor21Sheliftedhimfromthecageand22himsoftlyintotheair.Thebirdcircledoncetwicethreetimes. Thegirlwatcheddelightedlyatthebird’senjoyment.Herheartwasnolonger23withherloss.Suddenlythebirdflewcloserand24softlyonhershoulder.Itsangthesweetestmelodythatshehadeverheard. Thefastestwayto25loveistoholdonittootightlywhilethebestwaytokeeploveistogiveitWINGS! 24.

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop. DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13.Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandies!IwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 2

列方程或方程组解应用题北京市实施交通管理新措施以来全市公共交通客运量显著增加．据统计2008年10月11日至2009年2月28日期间地面公交日均客运量与轨道交通日均客运量总和为1696万人次地面公交日均客运量比轨道交通日均客运量的4倍少69万人次．在此期间地面公交和轨道交通日均客运量分别为多少万人次

先化简再求值

不等式的解集

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandiesIwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 6

WhatisWalktoSchoolNowweareworkingonaprogrammeofWalktoSchool.Wewouldlikeasmanyparentsandchildrenaspossibletotakepartevenifinasmallway.Childrenwhowalktoandfromschoolalongwiththeirparentscanlearnessentialroadsafetyandlifeskills.Youcantakepartby...■Walkingtoandfromschoolwithyourchildeveryday.■Walkingforoneortwodaysduringtheweek.■Encouragingotherstowalkifyoualreadydo.Walkingisgreat!■Walkingisgreatexercise!Awalkisgoodforyourbodyandcankeepyoufit.■Youwon’thavetowastetimelookingforaparkingsite.■It’sfree.You’llsavemoneybynotusingthecar.■It’spollution-free.■It’sagoodchancetotalktoyourchildrenandtomeetotherparentstoo.Enjoyingwalkingtoschool!Herearesomesuggestionstohelpyouandyorechildenjoywalkingtoschool.■Planasaferoutetogether.■Teachchildrenwhatakerbisandwhatitmeans.■Encourageyourchildtohelpyouchoosethesafestplacestocrosstheroad.■Lookatanddiscussthethingsyouseeonyourway—especiallyroadsignsandwhattheymean.Walktoschool!ThousandsofparentsandchildrenalreadytakepartcouldyouPleasegotowww.walktoschoolorg.ukformoreinformation.Whatisthefirstthingtodoifyouwanttoenjoyyourwalkingtoschool

代数式3x2-4x+6的值为9则的值为．

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop. DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13.Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandies!IwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 8

若log4x+2y+log4x-2y=1则|x|-|y|的最小值是．

若直线1+nx+y+1=0与圆x2+y2-2x=0相切则a的值为

理解新信息的意义首先必须获得充分的感性经验其次要对感性经验进行充分的思维加工这是通过______和______两个环节来实现的．

如图在直三棱柱ABC-A1B1C1中∠BAC=90°AB=BB1=1直线B1C与平面ABC成30°角 Ⅰ求证平面B1AC⊥平面ABB1A1 Ⅱ求二面角B-B1C-A的大小 Ⅲ求点A1到平面B1AC的距离

已知复数Z1Z2满足|Z1|=2|Z2|=3若它们所对应向量的夹角为60°则．

Whenyouareinanothercountryitisimportanttoknowthelanguagebutitisequallyimportanttoknowhowtocommunicatenonverballybeforesayinganythingbymakinggestures.Accordingtoapioneerinnonverbalcommunicationonly20to35percentofourcommunicationisverbal.Whenpeopledon’tknowthelanguagethemostcommonwaytocommunicateisthroughgestures.Howevermanygestureshavedifferentmeaningsornomeaningatallindifferentpartsoftheworld. IntheUnitedStatesforexamplenoddingyourheadupanddownmeansyes.InsomepartsofGreeceandTurkeyhoweverthismotioncanmeanno.InSoutheastAsianoddingyourheadisapolitewayofsayingI’veheardyou. InancientRomewhentheemperorwantedtosparesomeone’slifehewouldputhisthumbup.TodayintheUnitedStateswhensomeoneputshis/herthumbupitmeansEverythingisallright.HoweverinSardiniaandGreecethegestureisinsultingandshouldnotbeusedthere. IntheUnitedStatesraisingyourclaspedhandsaboveyourheadmeansI’mthechampionorI’mthewinner.Itisthesignprizefightersmakewhentheywinafight.WhenaleadingRussianstatesmanmadethisgestureafteraWhiteHousemeetingAmericansmisunderstoodandthoughthemeanthewasawinner.InRussiahoweveritisasignoffriendship. IntheUnitedStatesholdingyourhandupwiththethumbandindexfingerinacircleandtheotherthreefingersspreadoutmeansEverythingisOKandisfrequentlyusedbyastronautsandpoliticians.InFranceandBelgiumitcanmeanYou’reworthnothing. Thereareothernonverbalsignalsthatpeopleshouldbeawareofwhentheygotoanothercountrysuchasthedistancetomaintainbetweenspeakers.Americansusuallyfeelcomfortablewhenspeakingwithsomeoneifthedistancebetweenthemisabouteighteeninchestoarm’slength.Anythingclosermakesthemfeeluncomfortable. WhentalkingtoAmericansitisalsoimportanttomakeeyecontact.IfyoulookdownwhentalkingtoanAmericanhe/shemayfeelthatyouareembarrassedafraidortryingtohidesomething. Inadditiontoknowinghowtocommunicatenonverballyinacountryitisimportanttoknowwhatyouandhecannotdiscuss.IntheUnitedStatestherearecertaintopicstoavoidwhenyoufirstmeetsomeoneForexampledon’taskpeopletheirageweightreligionmaritalstatushowmuchmoneytheyearnorhowmuchsomethingcosts.Youcantalkaboutworktheweathertrafficproblemssportsfoodnewsofthedaywhereonelivesconsumersubjectscomputerscarrepairsandsoforthandtravelorvacationplans. Thesefewexamplesillustratethatyouractionscanspeaklouderthanyourwords.Inaparticularculturalcontestwhatyousayandwhatyoudon’tsayareequallyimportant. Pleaseparaphrasetheclauseyouractionscanspeaklouderthanyourwords.

函数的图象与x轴所围成的封闭图形的面积为．

MotherhoodmaymakewomensmarterandmayhelppreventdementiainoldagebybathingthebraininprotectivehormonesUSreseachersreportedonThursday.TestsonratsshowthatthosewhoraisetwoormorelittersofpupsdoconsiderablybetterintestsofmemoryandskillsthanratswhohavenobabiesandtheirbrainsshowchangesthatsuggesttheymaybeprotectedagainstdiseasessuchasAlzheimer’s.UniversityofRichmondpsychologyprofessorCraigKinsleybelieveshisfindingswilltranslateintohumans.OurresearchshowsthatthehormonesofpregnancyareprotectingthebrainincludingestrogenwhichweknowhasmanyneuroprotectiveeffectsKinsleysaid.It’sratdatabuthumansaremammalsjustliketheseanimalsaremammalsheaddedinatelephoneinterview.Theygothroughpregnancyandhormonalchanges.KinsleysaidhehopedpublichealthofficialsandresearcherswilllooktoseeifhavinghadchildrenprotectsawomanfromAlzheimer’sandotherformsofage-relatedbraindecline.WhenpeoplethinkaboutpregnancytheythinkaboutwhathappenstobabiesandthemotherfromtheneckdownsaidKinsleywhopresentedhisfindingstotheannualmeetingoftheSocietyofNeuroscienceinOrlandoFlorida.Theydonotrealizethathormonesarewashingonthebrain.Ifyoulookatfemaleanimalswhohavenevergonethroughpregnancytheyactdifferentlytowardyoung.Butifshegoesthroughpregnancyshewillsacrificeherlifeforherinfant—thatisagreatchangeinherbehaviorthatshowedingeneticalterationstothebrain./Whichtitleisthebestforthispassage

JeanneCalmentaFrenchwomanbecamearecordbreakeron17Octoberof1995whenattheageof120yearsand238daysshebecamethelongest-livedhumanbeingonrecord.AJapanesemandiedin1986attheageof120yearsand237days. JeanneCalmentlivesinasmalloldpeople’shomeinthesouthofFrance;herhusbandheronlychildandhergrandsonhavealldied.Sheisnearlyblindanddeafandsheisalwaysinawheelchairbutherdoctordescribesherasbeingmorelikea90-year-oldingoodhealththansomeoneof120.Shestillhasalivelysenseofhumor.Whenaskedonher120thbirthdaywhatsheexpectedofthefutureshereplied:Averyshortone.ShealsoremarkedthatshethoughtthegoodLordhadforgottenallabouther. SowhatisthekeytoalonglifeAccordingtosomedoctorsdietexerciseandnosmokingarethethreeimportantfactors.JeanneCalmenthasfollowedtwoofthetips.Shehasalwayseatenahealthydietandsheusedtodoexerciseseverydayuntilshebrokeherlegattheageof115.Howeveruntilrecentlyshedranktwoglassedofstrongredwineadayandshedoessmokenowonlyalittle.BesidesJeanneCalmentmighthavegotverygoodgenesfromherparents.Herfatherlivedtotheageof94andhermotherto86. Alocallawyerboughtherhousewhenshewas80underanagreementthathewouldpayhersomemoneyeveryyearuntilherdeath.Itmusthaveseemedagoodmoveatthetimebutsofarthelawyerhaspaidheratleastthreetimesthevalueofthehouse.EveryyearonherbirthdayJeanneCalmentsendshimacardsaying:SorryI’mstillalive! Whichofthefollowingcouldbestreplacethewordmoveinthefourthparagraph

已知直线l⊥平面α直线m平面β给出下列命题其中正确命题的序号是

It'simpossibleforachildtodosomuchworkwithinashortperiodoftime______

小学英语课程设计原理和思路是什么

不等式组的整数解的个数为．

—Wasitnotuntillastweekhedecidedtogiveupsmoking—No.Hebeganhesawthenewsfilmlastmonth.

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandiesIwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 18

Iwasasingleparentoffoursmallchildrenworkingatalowpaidjob.Moneywasalwaystightbutwehada1overourheadsfoodonthetableclothesonourbacksandifnotalotalways2.NotknowingwewerepoormykidsjustthoughtIwas3.I’vealwaysbeengladaboutthat. ItwasChristmastimeandalthoughtherewasn’t4foralotofgiftsweplannedtocelebratewithafamilyparty.Butthebig5forthekidswasthefunofChristmas6. Theyplannedweeksaheadoftimeasking7whattheywantedforChristmas.FortunatelyIhadsavedMYM120for8tosharebyallfiveofus. Thebig9arrived.Igaveeachkidatwenty-dollarbilland10themtolookforgiftsofaboutfourdollarseach.Theneveryonescattered.Wehadtwohourstoshop;thenwewould11backattheSanta’sWorkshop DrivinghomeeveryonewasinhighChristmasspirits12myyoungerdaughterGingerwhowasunusually13Shehadonlyonesmallflatbagwithafewcandies—fiftycentcandiesIwassoangrybutIdidn’tsayanything14wegothome.Icalledherintomybedroomandclosedthedoor15tobeangryagain.Thisiswhatshetoldme. Iwaslooking16thinkingofwhattobuyandI17toreadthelittlecardsonthe’GivingTrees’.Onewasforalittlegirlfouryearsoldandallshe18forChristmaswasadoll.SoItookthecardoffthetreeand19thedollforher.Wehavesomuchandshedoesn’thaveanything. Ineverfeltso20asIdidthatday. 12

遗传

如图所示已知三棱锥A—BCD平面ABD⊥平面BCDAB=AD=1AB⊥ADDB=DCDB⊥DC 1求证AB⊥平面ADC 2求二面角A—BC—D的大小 3求三棱锥A—BCD的体积．

TheManofManySecrets—HarryHoudini—wasoneofthegreatestAmericanentertainersinthetheaternextcentury.Hewasamanfamousforhisescapes—fromprisoncellsfromwoodenboxesfloatinginriversfromlockedtanksfullofwater.HeappearedintheatersalloverEuropeandAmerica.CrowdscametoseethegreatHoudiniandhismagictricks. Ofcoursehissecretwasnotmagicorsupernaturalpowers.Itwassimplystrength.Hehadtheabilitytomovehistoesaswellashemovedhisfingers.Hecouldmovehisbodyintoalmostanypositionhewanted. Houdinistartedworkingintheentertainmentworldwhenhewas17in1891.HeandhisbrotherTheoperformedcardtricksinclubinNewYork.TheycalledthemselvestheHoudiniBrothers.WhenHarrymarriedin1894heandhiswifeBessworkedtogetherasmagicianandassistant.Butforalongtimetheywerenotverysuccessful.ThenHarryperformedhisfirstprisonescapeinChicagoin1898.Harrypersuadedadetectivetolethimtrytoescapefromtheprisonandheinvitedthelocalnewspapermentowatch. ItwasthepublicitythatcamefromthisthatstartedHarryHoudini’ssuccess.Harryhadfingerstrainedtoescapefromhandcuffsandtoestrainedtoescapeanklechins.Buthisbiggestsecretwashowheunlockedtheprisondoors.EverytimehewentintotheprisoncellBessgavehimakissforgoodluck—andasmallskeletonkeywhichisakeythatfitsmanylockspassquicklyfromhermouthtohis. Harryusedtheseprisonescapestobuildhisfame.Hearrangedtoescapefromthelocalprisonofeverytownhevisited.Intheafternoonthepeopleofthetownwouldreadaboutitintheirlocalnewspapersandintheeveningeveryseatinthelocaltheaterwouldbefull.WhatwastheresultWorld-wildfameandanamerememberedtoday. AccordingtothepassageHoudini’ssuccessinprisonescapesdependson

发音不同的是

已知两个实数集合A=a1a2a100与B=b1b2b50若从A到B的映射f使得B中每个元素都有原象且fa1≤fa2≤≤fa100则这样的映射共有．

函数y=log2x+1的图象经过

从迁移的观点来看温故而知新属于．

根据提示写一篇报道字数80～100不必逐字逐句地翻译九月十日是教师节下午中华学校召开庆祝大会会上表彰了二十位从教三十年以上老教师并授予他们荣誉奖章校长发表了热情洋溢的讲话师生代表也发了言然后观看了师生表演的文艺节目一片喜气洋洋的气氛教师是人类灵魂的工程师全社会都应该尊敬教师

Whenyouareinanothercountryitisimportanttoknowthelanguagebutitisequallyimportanttoknowhowtocommunicatenonverballybeforesayinganythingbymakinggestures.Accordingtoapioneerinnonverbalcommunicationonly20to35percentofourcommunicationisverbal.Whenpeopledon’tknowthelanguagethemostcommonwaytocommunicateisthroughgestures.Howevermanygestureshavedifferentmeaningsornomeaningatallindifferentpartsoftheworld. IntheUnitedStatesforexamplenoddingyourheadupanddownmeansyes.InsomepartsofGreeceandTurkeyhoweverthismotioncanmeanno.InSoutheastAsianoddingyourheadisapolitewayofsayingI’veheardyou. InancientRomewhentheemperorwantedtosparesomeone’slifehewouldputhisthumbup.TodayintheUnitedStateswhensomeoneputshis/herthumbupitmeansEverythingisallright.HoweverinSardiniaandGreecethegestureisinsultingandshouldnotbeusedthere. IntheUnitedStatesraisingyourclaspedhandsaboveyourheadmeansI’mthechampionorI’mthewinner.Itisthesignprizefightersmakewhentheywinafight.WhenaleadingRussianstatesmanmadethisgestureafteraWhiteHousemeetingAmericansmisunderstoodandthoughthemeanthewasawinner.InRussiahoweveritisasignoffriendship. IntheUnitedStatesholdingyourhandupwiththethumbandindexfingerinacircleandtheotherthreefingersspreadoutmeansEverythingisOKandisfrequentlyusedbyastronautsandpoliticians.InFranceandBelgiumitcanmeanYou’reworthnothing. Thereareothernonverbalsignalsthatpeopleshouldbeawareofwhentheygotoanothercountrysuchasthedistancetomaintainbetweenspeakers.Americansusuallyfeelcomfortablewhenspeakingwithsomeoneifthedistancebetweenthemisabouteighteeninchestoarm’slength.Anythingclosermakesthemfeeluncomfortable. WhentalkingtoAmericansitisalsoimportanttomakeeyecontact.IfyoulookdownwhentalkingtoanAmericanhe/shemayfeelthatyouareembarrassedafraidortryingtohidesomething. Inadditiontoknowinghowtocommunicatenonverballyinacountryitisimportanttoknowwhatyouandhecannotdiscuss.IntheUnitedStatestherearecertaintopicstoavoidwhenyoufirstmeetsomeoneForexampledon’taskpeopletheirageweightreligionmaritalstatushowmuchmoneytheyearnorhowmuchsomethingcosts.Youcantalkaboutworktheweathertrafficproblemssportsfoodnewsofthedaywhereonelivesconsumersubjectscomputerscarrepairsandsoforthandtravelorvacationplans. Thesefewexamplesillustratethatyouractionscanspeaklouderthanyourwords.Inaparticularculturalcontestwhatyousayandwhatyoudon’tsayareequallyimportant. Whichofthefollowingistrue

若某几何体的三视图如图所示则这个几何体的直观图可以是．

Thedriverbegantospeeduptoforthehourhadlostinthetrafficjam.

已知fx是定义在R上的函数f1=1且对任意x∈R都有fx+5≥fx+5fx+1≤fx+1若gx=fx+1-x则g2002=______

已知△ABC与△DEF相似且面积比为4:25则△ABC与△DEF的相似比为______．

课堂纪律的类型有______促成的纪律______促成的纪律______促成的纪律和______促成的纪律四种．

如下图所示左边的楼高AB=60m右边的楼高CD=24m且BC=30m地面上的目标 P位于距点C15m处． 1请画出从A处看地面上距离点C最近的点．这个点与点C之间的距离是多少 2从A处能看见目标P吗为什么

Heisonlytooreadytohelpothersseldomrefusingthemwhentheyturntohim.

Somepeoplemakeyoufeelcomfortablewhentheyarearound.Youspendanhourwiththemandfeelasifyouhaveknownthemhalfyourlife.Thesepeoplehavesomethingincommon.Andonceweknowwhatitiswecantrytodoitourselves.HowisitdoneHereareseveralskillsthatgoodtalkershave.Ifyoufollowtheskillsthey’llhelpyouputpeopleattheireaseandmakefriendswiththemquickly.Firstofallgoodtalkersaskquestions.Almostanyonenomatterhowshyheiswillansweraquestion.Onewell-knownbusinesswomansaysAtbusinesslunchesIalwaysaskpeoplewhattheydidthatmorning.It’sacommonquestionbutitwillgetthingsgoing.Fromthereyoucanmoveontoothermatters—sometimestoreallypersonalquestions.Andhowheanswerswillletyouknowhowfaryoucango.Secondoncegoodtalkershaveaskedquestionstheylistentotheanswers.Thispointseemsclearbutitisn’t.Yourquestionsshouldhaveapointandhelptotellwhatsortofpersonyouaretalkingto.Andtofindoutyoureallyhavetolistencarefullyandattentively.Reallisteningatleastmeanssomethings.Firstitmeansnottochangethesubjectofconversation.Ifsomeonestickstoonetopicyoucantakeitasafactthathe’sreallyinterestedinit.Reallisteningalsomeansnotjustlisteningtowordsbuttotonesofvoice.Ifthevoicesoundsdullthenit’stimeforyoutochangethesubject.Finallygoodtalkersknowwellhowtodealwiththeoccasionofparting.Ifyou’resayinggoodbyeyoumaygivehimafirmhandshakeandsayI’vereallyenjoyedmeetingyou.Ifyouwanttoseethatpersonagaindon’tkeepitasecret.Letpeopleknowwhatyoufeelandtheymaywalkawayfeelingasifthey’veknownyouhalftheirlife.Generallyspeakinggoodtalkersarepersonswho______.

数列an满足an+1=an-3n≥1且a1=7则a3的值是______．

椭圆2x2+y2=8的焦点坐标是______．

学记指出时教必有正业退息必有居学．说明人们对______的重视．

已知△ABC与△DEF相似且面积比为4:25则△ABC与△DEF的相似比为______．

以直角三角形ABC的两直角边ACBC为一边各向外侧作正方形ACDEBCGH连结BEAH分别交ACBC于PQ．求证CP=CQ．

列方程或方程组解应用题为保证学生有足够的睡眠政协委员于今年两会上向大会提出一个议案即推迟中小学生早晨上课时间这个议案当即得到不少人大代表的支持．根据北京市教委的要求学生小强所在学校将学生到校时间推迟半小时．小强原来7点从家出发乘坐公共汽车7点20分到校现在小强若由父母开车送其上学7点45分出发7点50分就到学校了．已知小强乘自家车比乘公交车平均每小时快36千米求从小强家到学校的路程是多少千米

Apunctualpersonisinthehabitofdoingathingatthepropertimeandisneverlateinkeepinganappointment.Theunpunctualmanononehandneverdoeswhathehastodoatthepropertime.Heisalwaysinahurryandintheendlosesbothtimeandhisgoodname.Alostthingmaybefoundagainbutlosttimecanneverberegained.Timeismorevaluablethanmaterialthings.Infacttimeislifeitself.Theunpunctualmanisforeverwastingandmismanaginghismostvaluableassetaswellasother’s.Theunpunctualpersonisalwayscomplainingthathefindsnotimetoanswerlettersorreturncallsorkeepappointmentspromptly.Butthemanwhoreallyhasagreatdealtodoisverycarefulofhistimeandseldomcomplainsofwantofit.Heknowsthathecannotgetthroughhishugeamountofworkunlesshefaithfullykeepseverypieceofworkwhenithastobeattendedto.Failuretobepunctualinkeepingone’sappointmentsisthesignofdisrespecttowardsothers.Ifapersonisinvitedtodinnerandarriveslaterthantheappointedtimehekeepsalltheotherguestswaitingforhim.Usuallythiswillberegardedasagreatdisrespecttothehostandallotherguestspresent.Unpunctualitymoreoverisveryharmfulwhenitcomestodoone’sdutywhetherpublicorprivate.Imaginehowitwouldbeifthosewhoareputinchargeofimportanttasksfailedtobeattheirproperplaceattheappointedtime.Amanwhoisknowntobehabituallyunpunctualisnevertrustedbyhisfriendsorfellowmen.Whatdoestheauthorthinkisthemaindifferencebetweenapunctualpersonandanunpunctualperson

Everybodydreams.Somepeoplethinkdreamscantellusaboutthefuture.Otherpeoplethinkdreamscantellusaboutourselves.It’slikeour11istalkingtous. Whyaredreams12strangeandhardtounderstandSomepeoplethinkourbrainuses13totalktous.Whenweflyswimorfalldowninourdreamsithasa14meaning.Lotsofdoctorshelppeople15theirdreams.Theyfindthatdreamstellusaboutour16andfears. Thesedaysmanyscientists17thatdreamsareveryimportant.Duringthedaywehavemany18andourbrainreceivesalotofinformation.Whenwedreamourbrain19informationthatisnotimportantandputsthemostimportantinformationintoour20.Aswelearnmoreaboutthebrainwemayfindanswerstoourquestionsaboutdreams. 15.

Apunctualpersonisinthehabitofdoingathingatthepropertimeandisneverlateinkeepinganappointment. Theunpunctualmanononehandneverdoeswhathehastodoatthepropertime.Heisalwaysinahurryandintheendlosesbothtimeandhisgoodname.Alostthingmaybefoundagainbutlosttimecanneverberegained.Timeismorevaluablethanmaterialthings.Infacttimeislifeitself.Theunpunctualmanisforeverwastingandmismanaginghismostvaluableassetaswellasother’s.Theunpunctualpersonisalwayscomplainingthathefindsnotimetoanswerlettersorreturncallsorkeepappointmentspromptly.Butthemanwhoreallyhasagreatdealtodoisverycarefulofhistimeandseldomcomplainsofwantofit.Heknowsthathecannotgetthroughhishugeamountofworkunlesshefaithfullykeepseverypieceofworkwhenithastobeattendedto. Failuretobepunctualinkeepingone’sappointmentsisthesignofdisrespecttowardsothers.Ifapersonisinvitedtodinnerandarriveslaterthantheappointedtimehekeepsalltheotherguestswaitingforhim.Usuallythiswillberegardedasagreatdisrespecttothehostandallotherguestspresent. Unpunctualitymoreoverisveryharmfulwhenitcomestodoone’sdutywhetherpublicorprivate.Imaginehowitwouldbeifthosewhoareputinchargeofimportanttasksfailedtobeattheirproperplaceattheappointedtime.Amanwhoisknowntobehabituallyunpunctualisnevertrustedbyhisfriendsorfellowmen. Accordingtothepassagethemainreasonthatapersonisalwaysunpunctualisthat.

Withtheshiningwaterbeforeyouandthewind______treesbehindyouyoucannothelp______.

Itwasbelievedthatthingswouldgetworsebutitistheyaregettingbetter.

在△ABC中AB=CB∠ABC=90°F为AB延长线上一点点E在BC上且AE=CF． 1求证Rt△ABE≌Rt△CBF 2若∠CAE=30°求∠ACF的度数．

函数fx=x3-3x2-9x+a的图像经过四个象限的充要条件______．

列方程或方程组解应用题为保证学生有足够的睡眠政协委员于今年两会上向大会提出一个议案即推迟中小学生早晨上课时间这个议案当即得到不少人大代表的支持．根据北京市教委的要求学生小强所在学校将学生到校时间推迟半小时．小强原来7点从家出发乘坐公共汽车7点20分到校现在小强若由父母开车送其上学7点45分出发7点50分就到学校了．已知小强乘自家车比乘公交车平均每小时快36千米求从小强家到学校的路程是多少千米

已知fx是定义在R上的函数f1=1且对任意x∈R都有fx+5≥fx+5fx+1≤fx+1．若gx=fx+1-x则g2002=______．

提出泛智教育思想主张把一切知识教给一切人的教育家是______．

成年人应该知道如何帮助孩子们在智力上发展

列方程或方程组解应用题为保证学生有足够的睡眠政协委员于今年两会上向大会提出一个议案即推迟中小学生早晨上课时间这个议案当即得到不少人大代表的支持．根据北京市教委的要求学生小强所在学校将学生到校时间推迟半小时．小强原来7点从家出发乘坐公共汽车7点20分到校现在小强若由父母开车送其上学7点45分出发7点50分就到学校了．已知小强乘自家车比乘公交车平均每小时快36千米求从小强家到学校的路程是多少千米

如图已知三棱锥A-BPC中AP⊥PCAC⊥BCM为AB中点D为PB中点且APMB为正三角形 求证平面ABC⊥平面APC

研究表明人们总是做带有倾向性的内归因或外归因对自己的成绩常做______归因而对他人的成绩出于嫉妒可能做______归因．

我国第一个正式实施的学制是______．

本电视机生产厂家去年销往农村的某品牌电视机每台的售价y元与月份x之间满足函数关系y=-50x+2600去年的月销售量p万台与月份x之间成一次函数关系其中每个月的销售情况如下表 月份 1月 5月 销售量 3.9万台 4.3万台 1求该品牌电视机在去年哪个月销往农村的销量金额最大最大是多少 2由于受国际金融危机的影响今年12月份该品牌电视机销往农村的售价都比去年12月份下降了m%且每月的销售量都比去年12月份下降了1.5m%．国家实施家电下乡政策即对农村家庭购买新的家电产品国家按该产品售价的13%给予了财政补贴．受此政策的影响今年3至5月份该厂家销售到农村的这种电视机在保持今年2月份的售价不变的情况下平均每月的销售量比今年2月份增加了1.5万台．若今年3至5月份国家对这种电视机的销售共给予了财政补贴936万元求m的值保留一位小数．

计算

西方课程一词最早出现在什么知识最有价值之中其作者是英国的______．

设abc是直角三角形的三边c为斜边整数n≥3求证an+bn＜cn．

美国人力资本理论的代表者舒尔茨推算出教育水平对国民经济增长的贡献是______．

Everybodydreams.Somepeoplethinkdreamscantellusaboutthefuture.Otherpeoplethinkdreamscantellusaboutourselves.It’slikeour11istalkingtous. Whyaredreams12strangeandhardtounderstandSomepeoplethinkourbrainuses13totalktous.Whenweflyswimorfalldowninourdreamsithasa14meaning.Lotsofdoctorshelppeople15theirdreams.Theyfindthatdreamstellusaboutour16andfears. Thesedaysmanyscientists17thatdreamsareveryimportant.Duringthedaywehavemany18andourbrainreceivesalotofinformation.Whenwedreamourbrain19informationthatisnotimportantandputsthemostimportantinformationintoour20.Aswelearnmoreaboutthebrainwemayfindanswerstoourquestionsaboutdreams. 13.