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已知双曲线=1(a>0,b>0)的左焦点为F(﹣,0),点A的坐标为(0,2),点P为双曲线右支上的动点,且△APF周长的最小值为8,则双曲线的离心率为( )
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高三下学期数学《》真题及答案
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已知A.是双曲线的左顶点F1F2分别为双曲线的左右焦点P.为双曲线上一点G.是△PF1F2的重心若则
已知F.1F.2为双曲线E.:=1a>0b>0的左右两个焦点点M.在E.上MF1与x轴垂直sin∠M
已知双曲线a>0b>0的左右顶点分别为AB点F为双曲线C的左焦点过点F作垂直于x轴的直线分别在第二第
已知F1F2分别是双曲线-=1a>0b>0的左右焦点P为双曲线右支上的任意一点.若=8a则双曲线的离
已知F.1F.2分别是双曲线-=1a>0b>0的左右焦点P.为双曲线右支上的任意一点.若则双曲线的离
已知双曲线-=1a>0b>0的左右焦点分别为F.1F.2点P.在双曲线的右支上且|PF1|=4|PF
已知
是双曲线
=1(a>0,b>0)的左顶点,F.
1
、F.
2
分别为双曲线的左、右焦点,P.为双曲线上一点,G.是△PF
1
F.
2
的重心,若
,则双曲线的离心率为( ) A.2
3
4
与λ的取值有关
已知双曲线-=1a>0b>0AC分别是双曲线虚轴的上下端点BF分别是双曲线的左顶点和左焦点.若双曲线
已知双曲线直线l过其左焦点交双曲线左支于
B.两点,且|AB|=4,F.
2
为双曲线的右焦点,△AB
的周长为20,则m的值为( ) A.8
9
16
20
已知中心在原点的双曲线C.的右焦点为20左顶点为.1求双曲线C.的方程2若直线y=kx+mk≠0m≠
已知双曲线的中心在原点一个焦点为F1-0点P.在双曲线上且线段PF1的中点坐标为02那么此双曲线的方
已知F.是双曲线-=1的左焦点A14P是双曲线右支上的动点则|PF|+|PA|的最小值为.
已知双曲线中心在坐标原点且一个焦点为F1-0点P.位于该双曲线上线段PF1的中点坐标为02则该双曲线
-y
2
=1
x
2
-=1
-=1
-=1
已知双曲线C.a>0b>0的左右焦点分别为F1F2点M.与双曲线C.的焦点不重合点M.关于F1F2的
,
,线段MN的中点在双曲线的右支上,若|AN|﹣|BN|=12,则a= A.3B.4
5
6
已知双曲线-=1a>0b>0的左右焦点分别为F1F2以F1F2为直径的圆与双曲线在第一象限的交点为P
已知点P.是双曲线a>0b>0右支上一点F.1F.2分别为双曲线的左右焦点H.为△PF1F.2的内心
已知F.1F.2是双曲线-=1a>b>0的左右焦点P.为双曲线左支上一点若的最小值为8a则该双曲线的
(1,3)
(1,2)
(1,3]
(1,2]
已知双曲线C.a>0b>0的左右焦点分别为F1F2点M.与双曲线C.的焦点不重合点M.关于F1F2的
,
,线段MN的中点在双曲线的右支上,若|AN|﹣|BN|=12,则a= A.3B.4
5
6
已知双曲线C.﹣=1a>0b>0的左右焦点分别为F1F2O.为坐标原点点P.是双曲线在第一象限内的点
已知F.是双曲线a>0b>0的左焦点E.是该双曲线的右顶点过点F.且垂直于x轴的直线与双曲线交于
B.两点,若
为钝角,则该双曲线的离心率e的取值范围为( ) A.(1,+∞)
(1,2)
(1,1+
)
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Whenyouhavegotalotofstuffdecluttering整理yourhomecanbereallynecessary.Declutteringisjustaboutputtingnewsystemsintoplaceinyourlife.1yourealizehowgreatyoufeelaboutitandyouwanttokeepgoing. Gettingridofthingsgivesyoutimetolookafteryourself.2orlookingforthepotatopeeler﹣becauseeverythinghasahomeandyouknowexactlywhereitis﹣you'refreetospendthattimeonyourselfandyourfamily.It'sliberating. 3.Ithastakenyoualongtimetogeteverythingandyouwon'tbeabletogetridofitallstraightaway.Ifyou'repushedfortimethereareeasywaysofintroducingdeclutteringintoyourlife.Spend10minutesadaydeclutteringorifthat'snotmanageabledeclutterthreeitemsaweek. Havethreepiles:oneforthingsyou'regoingtokeeponeforthingsthatareamaybeandoneforthingsyou'regoingtogiveaway.Youwillalsoneedsomebinbagsforrubbish.Arevisitingpileisimportantifyou'restrugglingtogetridofthings.4.MoreoftenthannotyouendupsayingactuallyIdon'tneedthat. Stayfocused.Peopleoftengetsidetrackedwhenthey'retryingtodeclutter.Theystarttryingonclothestheyhadforgottenaboutorlookingatoldphotos.Anothercommonmistakeistojustmovethingsfromplacetoplaceinsteadofgettingridofthem.5. A.Onceyoustartdecluttering B.Youneedtimetoreflectonwhattokeep C.Don'texpecttodecluttereverythingovernight D.Whenyou'renotalwayslookingforthescissors E.Ifyourealisethatyouownsixwineopenerskeeponlyone F.Startthedeclutteringprocessbeforeyoumoveinwithanewpartner G.Youcanjustleavethingsthereforafewweeksbeforeafinaldecision
若存在等比数列{an}使得a1a2+a3=6a1﹣9则公比q的最大值为
如图某瓷器菜盘的外轮廓线是椭圆根据图中数据可知该椭圆的离心率为
Duringtherosyyearsofelementaryschool小学Ienjoyedsharingmydollsandjokeswhichallowedmetokeepmyhighsocialstatus.Iwasthequeenoftheplayground.Thencamemytweensandteensandmeangirlsandcoolkids.TheyroseintheranksnotbybeingfriendlybutbysmokingcigarettesbreakingrulesandplayingjokesonothersamongwhomIsoonfoundmyself.Popularityisawell﹣exploredsubjectinsocialpsychology.MitchPrinsteinaprofessorofclinicalpsychologysortsthepopularintotwocategories:thelikableandthestatusseekers.Thelikables'plays﹣well﹣with﹣othersqualitiesstrengthenschoolyardfriendshipsjump﹣startinterpersonalskillsandwhentappedearlyareemployedeverafterinlifeandwork.Thenthere'sthekindofpopularitythatappearsinadolescence:statusbornofpowerandevendishonorablebehavior.EnviableasthecoolkidsmayhaveseemedDr.Prinstein'sstudiesshowunpleasantconsequences.Thosewhowerehighestinstatusinhighschoolaswellasthoseleastlikedinelementaryschoolare'mostlikelytoengage从事indangerousandriskybehavior.'InonestudyDr.Prinsteinexaminedthetwotypesofpopularityin235adolescentsscoringtheleastlikedthemostlikedandthehighestinstatusbasedonstudentsurveys调查研究.'Wefoundthattheleastwell﹣likedteenshadbecomemoreaggressiveovertimetowardtheirclassmates.Butsohadthosewhowerehighinstatus.Itclearlyshowedthatwhilelikabilitycanleadtohealthyadjustmenthighstatushasjusttheoppositeeffectonus.'Dr.Prinsteinhasalsofoundthatthequalitiesthatmadetheneighborswantyouonaplaydate﹣sharingkindnessopenness﹣carryovertolateryearsandmakeyoubetterabletorelateandconnectwithothers.InanalyzinghisandotherresearchDr.Prinsteincametoanotherconclusion:Notonlyislikabilityrelatedtopositivelifeoutcomesbutitisalsoresponsibleforthoseoutcomestoo.'Beinglikedcreatesopportunitiesforlearningandfornewkindsoflifeexperiencesthathelpsomebodygainanadvantage'hesaid.1Whatsortofgirlwastheauthorinherearlyyearsofelementaryschool?A.Unkind.B.Lonely.C.Generous.D.Cool.2Whatisthesecondparagraphmainlyabout?A.Theclassificationofthepopular.B.Thecharacteristicsofadolescents.C.Theimportanceofinterpersonalskills.D.Thecausesofdishonorablebehavior.3WhatdidDr.Prinstein'sstudyfindaboutthemostlikedkids?A.Theyappearedtobeaggressive.B.Theytendedtobemoreadaptable.C.Theyenjoyedthehigheststatus.D.Theyperformedwellacademically.4Whatisthebesttitleforthetext?A.BeNice﹣YouWon'tFinishLastB.TheHighertheStatustheBetterC.BetheBest﹣YouCanMakeItD.MoreSelf﹣ControlLessAggressiveness
Nowadayspeopletendtodigitaliseeverythingfromwatchestofridges.Itseemsyoucanchooseanyitemlabeledassmart.1Howeverthereareplentythatcanbeusedtoreduceemissionsandsavemoney. Ifyou'reapartofthedigitalisationmovementyoumightbeinterestedintheconceptofsmarthomes.Itmeansthateveryelementofyourhousecanbecontrolledfromapanelonthewalloryourphone.2Useyourmobiletopowerthemonoroffandyoumayfeeltrulymodernortrulylazy.Asidesfromthebenefitsoflivingamorecomfortablelifethispresentsanopportunitytocutdownonyourelectricalbills. Electricitygenerationtodayrepresents31%oftotalglobalfossilfueluseandaround40%ofallenergy﹣relatedCO2emissions.3Itisconsideredasthefirststeptopreventglobalclimatechange.Connectasmartthermometertotheheatingandcoolingsystemandsetaspecifictemperatureatwhichtheheatingbeginstowork.Doingsotheroomwillbeatadesiredtemperaturewhennecessaryandswitchesonapower﹣savingmodewhennotoccupied.SimilarlybyinstallingaCO2sensoryoucanhaveanautomatedventilation通风system.4 Ina150000m2officecomplexnearMunichcalledCampeonenergycostsofupto117067Euroweresavedaftertheuseofenvironmentalcontroldevicesthisyear.InthiswaytheyarecontributingtoalargedecreaseinCO2emissions.Clearlysmarthomesareaboutmuchmorethanjustlivingacomfortablelife.5 A.Itisactuallyaboutlivingagreenlife. B.Smartdeviceshavebeeninstalledworldwidenowadays. C.ItstartsworkingonlywhenCO2concentrationsreachacertainlimit. D.Thereseemtobeanoceanofsuchso﹣calledsmartinventions. E.Bearingthisinmindmeasuresshouldbetakentomakebuildingsmoreenergy﹣efficient. F.Alternativeenergymustbediscoveredbeforethefossilfuelrunsoutinthefuture. G.Thisincludesbasicssuchasheatingandlightingandmanyotherappliances.
1Whatwas'GreenBook'originallyinthe1960s?A.Adocumentaryrecordingthelifeoftheblacks.B.AguidebookforAfrican﹣Americanroadtrippers.C.Abookteachingtheblackstotobetolerant.D.Astoryaboutablackandawhiteonatour.2Whatdoes'ticklesthekeys'suggestaboutShirleyinPara3?A.Heperformsinhistour.B.HehelpsLiptogivethethugsabeat.C.HegetsusedtoLip'sbehaviors.D.Hedrivesthecar.3Whodoestheauthorthinkhighlyofintheend?A.Theauthorofthefilm.B.GreenBookinthe1960s.C.Thecritics.D.Thefilmactors.
Monkeysseemtohaveawaywithnumbers.AteamofresearcherstrainedthreeRhesusmonkeystoassociate26clearlydifferentsymbolsconsistingofnumbersandselectiveletterswith0﹣25dropsofwaterorjuiceasareward.Theresearchersthentestedhowthemonkeyscombined﹣oradded﹣thesymbolstogetthereward.Here'showHarvardMedicalSchoolscientistMargaretLivingstonewholedtheteamdescribedtheexperiment:Intheircagesthemonkeyswereprovidedwithtouchscreens.Ononepartofthescreenasymbolwouldappearandontheothersidetwosymbolsinsideacirclewereshown.Forexamplethenumber7wouldflashononesideofthescreenandtheotherendwouldhave9and8.Ifthemonkeystouchedtheleftsideofthescreentheywouldberewardedwithsevendropsofwaterorjuice;iftheywentforthecircletheywouldberewardedwiththesumofthenumbers﹣17inthisexample.Afterrunninghundredsofteststheresearchersnotedthatthemonkeyswouldgoforthehighervaluesmorethanhalfthetimeindicatingthattheywereperformingacalculationnotjustmemorizingthevalueofeachcombination.Whentheteamexaminedtheresultsoftheexperimentmorecloselytheynoticedthatthemonkeystendedtounderestimate低估asumcomparedwithasinglesymbolwhenthetwowerecloseinvalue﹣sometimeschoosingforexamplea13overthesumof8and6.Theunderestimationwassystematic:Whenaddingtwonumbersthemonkeysalwayspaidattentiontothelargerofthetwoandthenaddedonlyafraction小部分ofthesmallernumbertoit.'Thisindicatesthatthereisacertainwayquantityisrepresentedintheirbrains'Dr.Livingstonesays.'Butinthisexperimentwhatthey'redoingispayingmoreattentiontothebignumberthanthelittleone.'1Whatdidtheresearchersdotothemonkeysbeforetestingthem?A.Theyfedthem.B.Theynamedthem.C.Theytrainedthem.D.Theymeasuredthem.2Howdidthemonkeysgettheirrewardintheexperiment?A.Bydrawingacircle.B.Bytouchingascreen.C.Bywatchingvideos.D.Bymixingtwodrinks.3WhatdidLivingstone'steamfindaboutthemonkeys?A.Theycouldperformbasicaddition.B.Theycouldunderstandsimplewords.C.Theycouldmemorizenumberseasily.D.Theycouldholdtheirattentionforlong.4Inwhichsectionofanewspapermaythistextappear?A.Entertainment.B.Health.C.Education.D.Science.
已知B12是抛物线My2=2pxp>0上一点F为M的焦点.1若是M上的两点证明|FA||FB||FC|依次成等比数列.2若直线y=kx﹣3k≠0与M交于Px1y1Qx2y2两点且y1+y2+y1y2=﹣4求线段PQ的垂直平分线在x轴上的截距.
Everyyearabout40000peopleattempttoclimbKilimanjarothehighestmountaininAfrica.They1withthemlotsofwaste.The2mightdamagethebeautyoftheplace.Theglaciers冰川aredisappearingchangingthe3ofKilimanjaro. HearingthesestoriesI'm4abouttheplace﹣otherdestinationsaredescribedaspurernaturalexperiences. HoweverIsoon5thatmuchhaschangedsincethedaysofdisturbingreportsof6amongtonsofrubbish.Ifinda7mountainwithtoiletsatcampsandalongthepaths.Theenvironmentalchallengesare8buttheeffortsmadebytheTanzaniaNationalParkAuthorityseemtobe9. ThebestofaKilimanjaro10inmyopinionisn'treachingthetop.Mountainsare11asspiritualplacesbymanycultures.This12isespeciallyevidentonKilimanjaroas13gothroughfiveecosystems生态系统inthespaceofafewkilometers.Atthebaseisarainforest.Itendsabruptlyat3000meters14landsoflowgrowingplants.Furtheruptheweather15﹣lowcloudsenvelopethemountainsideswhicharecoveredwiththickgrass.I16twelveshadesofgreenfromwhereIstand.Above4000metersisthehighland17:gravel砾石stonesandrocks.18youclimbintoanarctic﹣likezonewith19snowandtheglaciersthatmaysoondisappear. DoesKilimanjaro20itsreputationasacrowdedmountainwithlinesoftouristsruiningtheatmosphereofpeace?Ifoundtheoppositetobetrue. 1A.keep B.mix C.connect D.bring 2A.stories B.buildings C.crowds D.reporters 3A.position B.age C.face D.name 4A.silent B.skeptical C.serious D.crazy 5A.discover B.argue C.decide D.advocate 6A.equipment B.grass C.camps D.stones 7A.remote B.quiet C.all D.clean 8A.new B.special C.significant D.necessary 9A.payingoff B.spreadingout C.blowingup D.fadingaway 10A.atmosphere B.experience C.experiment D.sight 11A.studied B.observed C.explored D.regarded 12A.view B.quality C.reason D.purpose 13A.scientists B.climbers C.locals D.officials 14A.holdingonto B.goingbackto C.livingupto D.givingwayto 15A.changes B.clears C.improves D.permits 16A.match B.imagine C.count D.add 17A.village B.desert C.road D.lake 18A.Obviously B.Easily C.Consequently D.Finally 19A.permanent B.little C.fresh D.artificial 20A.enjoy B.deserve C.save D.acquire
假定你是李华.最近你校的英语戏剧社社团EnglishDramaClub需要招募一批新成员你打算加入.请根据所给提示写一封自荐信.内容包括: 1.自我介绍包括兴趣和优势 2.参加这个社团的目的 3.希望被批准 注意:1.词数100左右 2.开头和结尾已给出但不计入总词数. DearSirorMadam I'mLiHuafromClass1Grade1. Yourssincerely LiHua
汉朝时张衡得出圆周率的平方除以16等于如图网格纸上的小正方形的边长为1粗实线画出的是某几何体的三视图俯视图中的曲线为圆利用张衡的结论可得该几何体的体积为
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意: 1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. I'vehadmanydreamssinceIwasachild.Nowmydreamistoopensacafe.Thoughitmayappearsimpleitrequiredalotofideasandefforts.WhatIwantisnotjustanordinarilycafebutaveryspecialone.IwantmycafehaveaspecialthemesuchaslikeTangDynasty.Inthecafecustomerswillenjoyyourselvesinthehistoricalenvironmentwhatiscreatedforthem.IfIsucceedinmanageoneIwillopenmore.Iwishtohaveachainofcafesinmanydifferentcity.Eachofmycafeswillhaveadifferentthemeandanuniquestyle.
ForCanaanElementary'ssecondgradeinPatchogueN.Y.todayisspeechdayandrightnowit'sChrisPalaez'sturn.The8﹣year﹣oldisthejokeroftheclass.Withshiningdarkeyesheseemslikethekindofkidwhowouldenjoypublicspeaking.Buthe'snervous.'I'mheretotellyoutodaywhyyoushouldshould'Christripsonthe'﹣ld'apronunciationdifficultyformanynon﹣nativeEnglishspeakers.HisteacherThomasWhaleyisnexttohimwhisperingsupport.'Voteforme'ExceptforsomestumblesChrisisdoingamazinglywell.WhenhebringshisspeechtoaniceconclusionWhaleyinvitestherestoftheclasstopraisehim.AsonofimmigrantsChrisstartedlearningEnglishalittleoverthreeyearsago.Whaleyrecalls回想起howatthebeginningoftheyearwhencalledupontoreadChriswouldexcusehimselftogotothebathroom.LearningEnglishasasecondlanguagecanbeapainfulexperience.Whatyouneedisagreatteacherwholetsyoumakemistakes.'Ittakesalotforanystudent'Whaleyexplains'especiallyforastudentwhoislearningEnglishastheirnewlanguagetofeelconfidentenoughtosay‘Idon'tknowbutIwanttoknow.''Whaleygottheideaofthissecond﹣gradepresidentialcampaignprojectwhenheaskedthechildrenonedaytoraisetheirhandsiftheythoughttheycouldneverbeapresident.Theanswerbrokehisheart.Whaleysaystheprojectisaboutmorethanjustlearningtoreadandspeakinpublic.Hewantsthesekidstolearntoboast夸耀aboutthemselves.'Boastingaboutyourselfandyourbestqualities'Whaleysays'isverydifficultforachildwhocameintotheclassroomnotfeelingconfident.'1WhatmadeChrisnervous?A.Tellingastory.B.Makingaspeech.C.Takingatest.D.Answeringaquestion.2Whatdoestheunderlinedword'stumbles'inparagraph2referto?A.Improperpauses.B.Badmanners.C.Spellingmistakes.D.Sillyjokes.3WecaninferthatthepurposeofWhaley'sprojectisto.A.helpstudentsseetheirownstrengthsB.assessstudents'publicspeakingskillsC.preparestudentsfortheirfuturejobsD.inspirestudents'loveforpolitics4WhichofthefollowingbestdescribesWhaleyasateacher?A.Humorous.B.Ambitious.C.Caring.D.Demanding.
在△ABC中3sinA=2sinB. 1求cos2C 2若AC﹣BC=1求△ABC的周长.
TheSpanishsculptorIsaacCordalseesthecityashisplayground.Hespecializesinminiatureastreetartoftenrepresentingasocialcommentaryasacriticalobservationoncapitalismpowerandsoon.Cordalfirstmodelsthesculpturesinclaythenreproducesthemincement水泥about15cminheight.'Asamaterialcementseemsverysymbolicbecauseitisoneofourmostrecognizablefootprintsagainstnature.'hesays.'Todaywehavebeentoousedtocementcityhabitat.'Forseveralyearshe'sbeenworkingontheprojectCementEclipsesreferringtothestatewhenabuildingcoversthesun:'It'sacriticalreflectionontheideaofprogress.'ThesetinycementfigureshaveappearedincitiesacrossEuropefoundsittingontopofbussheltersordrowninginthegrasslandofthebigcity.'ThestreetbecameaperfectsettinginwhichIcouldfindenoughlandscapesforthem.Duetotheirsmallsizeandcolortheygoreallywellintotheurbanenvironment.Theyevennormallygounseenbypassersby.I'mveryinterestedinthatmomentofsurprisewhensomeoneaccidentallydiscoversthem.'hesays.'Nowadaysthereisafearofnotbeingseeninthepublicareasoeverythingisalwaysbigandbold.Webecomeaproductofthisanddonotfocusinasmuch.Ithinkitisgoodtopayattentiontosmalldetails.Myworkisarewardforthosewhodoanditallowsustounderstandandchangetheworldwehavecreatedinadifferentangle.'Cordalsays.1Whichofthefollowingbestexplains'miniature'Underlinedinparagraph1?A.Tinysculpture.B.Smallplayground.C.Socialcomments.D.Criticalobservation.2What'sCordal'sattitudetowardcementcityhabitat?A.Indifferent.B.Critical.C.Neutral.D.Supportive.3WhatdoesCordalintendtotellusinthelastparagraph?A.Everythingbiginpublicisattractive.B.Beingsmallmaybeafearinpublic.C.Weneedtofocusonthedetailsoftheproducts.D.Hisworkhelpsustoseetheworlddifferently.4Whatdoesthetextmainlytalkabout?A.Cordalandhisstreetart.B.Waystobeasculptor.C.Materialsusedforsculptures.D.Reflectionsoncityprogress.
AlbertEinsteinthegeniusbehindthetheoryofrelativityhasrecentlybeenmakingheadlinesagain.Howeverthistimeitisnotforanewscientificbreakthrough1forahandwrittennotehegaveabellboy95yearsago. InOctober1922EinsteinwasdeliveringaseriesoflecturesinJapan2hereceivedatelegraminforminghimthathe3awardtheNobelPrizeforPhysics. Though4pleaseatthenewstheNobelwinnerdecidedtocontinuewithhisJapanesetripinsteadof5headtoStockholmtoacceptthehonor. WhileinTokyohepenned6noteinGermansayingAquietandhumblelifewillbringmore7happythanthepursuitofsuccess…PerhapshehadnoloosechangetotipabellboycomingtodeliverthemessagehegavehimthenoteandtoldhimMaybeifyouareluckythenote8becomemorevaluablethanjustaregulartip. Earlierthisyearthebellboy'snephewdecidedtohandittoJerusalem﹣basedWinner'sAuctions拍卖andExhibitions.Thenotewasthenputupforauction9mightbringtheownerasurprising$1.56million10aEuropeanbuyer.ItwasarecordforanauctionofadocumentinIsraelandthewild﹣hairedscientistdeservedit.
x﹣7的展开式的第2项为.
在复平面内对应的点位于
设Sn为等差数列{an}的前n项和若a7=5S5=﹣55则nSn的最小值为
设函数fx=|x﹣1|+|x+3|. 1求不等式|fx﹣6|<1的解集 2证明4﹣x2≤fx≤2|x|+4.
ForWesterndesignersChinaanditsrichculturehavelongbeenaninspirationforWesterncreative.'It'snosecretthatChinahasalwaysbeenasource来源ofinspirationfordesigners'saysAmandaHillchiefcreativeofficeratA+ENetworksaglobalmediacompanyandhometosomeofthebiggestfashion时尚shows.EarlierthisyeartheChinaThroughALookingGlassexhibitioninNewYorkexhibited140piecesofChina﹣inspiredfashionableclothingalongsideChineseworksofartwiththeaimofexploringtheinfluenceofChineseaesthetics美学onWesternfashionandhowChinahasfueledthefashionableimaginationforcenturies.TheexhibitionhadrecordattendanceshowingthatthereishugeinterestinChineseinfluences.'Chinaisimpossibletooverlook'saysHill.'ChinesemodelsarethefacesofbeautyandfashioncampaignsthatselldreamstowomenallovertheworldwhichmeansChinesewomenarenotjustconsumersoffashion﹣theyarecentraltoitsmovement.'Ofcoursenotonlyaretoday'stopWesterndesignersbeinginfluencedbyChina﹣someofthebestdesignersofcontemporaryfashionarethemselvesChinese.'VeraWangAlexanderWangJasonWuaretakingonGallianoAlbazMarcJacobs﹣andbeatingthemhandsdownindesignandsales'addsHill.ForHillitisimpossiblenottotalkaboutChinaastheleadingplayerwhendiscussingfashion.'ThemostfamousdesignersareChinesesoarethemodelsandsoaretheconsumers'shesays.'Chinaisnolongerjustanothermarket;inmanysensesithasbecomethemarket.IfyoutalkaboutfashiontodayyouaretalkingaboutChina﹣itsinfluencesitsdirectionitsbreathtakingclothesandhowyoungdesignersandmodelsarefinallyacknowledgingthatinmanyways.'1WhatcanwelearnabouttheexhibitioninNewYork?A.Itpromotedthesalesofartworks.B.Itattractedalargenumberofvisitors.C.ItshowedancientChineseclothes.D.ItaimedtointroduceChinesemodels.2WhatdoesHillsayaboutChinesewomen?A.Theyaresettingthefashion.B.Theystartmanyfashioncampaigns.C.Theyadmiresupermodels.D.Theydobusinessallovertheworld.3Whatdotheunderlinedwords'takingon'inparagraph4mean?A.learningfromB.lookingdownonC.workingwithD.competingagainst4Whatcanbeasuitabletitleforthetext?A.YoungModelsSellingDreamstotheWorldB.AChineseArtExhibitionHeldinNewYorkC.DifferencesBetweenEasternandWesternAestheticsD.ChineseCultureFuelingInternationalFashionTrends
Theyhadbeenon1weplanetsformillionsofyearsbut2018wastheyearseveralspecies2officialdiedoffforever.Threebirdspecieswentextinctthisyeartwoof3aresongbirdsfromnortheasternBrazil.A4disturbtrendisthatmainlandspeciesarestartingtogoextinctratherthanislandspecies.Thespecies5wipeoutinthewildresultedfrommanyfactorssuchasthecreationofdamandtrapping6trade.Beyondbirdsotheranimalssuchasthevaquitaandthenorthernwhiterhino7beneartheend.Wearecurrentlyexperiencingtheworstspeciesdie﹣offssincethe81oseofthedinosaurs65millionyearsago.Althoughextinctionisa9naturephenomenonitoccursatarateofaboutonetofivespeciesperyear.Scientistsestimatewe'renowlosingspeciesat1000to10000timestherate.Inthepast500yearsabout1000species10goextinct.
从某小学随机抽取100名学生将他们的身高单位厘米分布情况汇总如表 由此表估计这100名小学生身高的中位数为结果保留4位有效数字
Ifyoufollowtheseinsidertipsyourphotoswilllooklikeyouhadtheplacetoyourselfatthepopulartouristattractions.VaticanMuseums:VaticanCityTheVaticandrawsmorethanfivemillionpeopleeachyearandqueuescanreachfourhoursduringpeakseason.ChristieHudsonseniorcommunicationsmanageratExpediarecommendschoosingaskip﹣the﹣1inetour.'Thisnotonlyletsyouavoidtheticketcounterbutalsoincludestheuseofaprivatepartnerentrance.'ExtratimetovisittheSistineChapel?Yes!BambooForest:KyotoJapanBambooForestisthemostworthysightinKyoto.Ⅱyou'relongingtoenjoythepathwaysandtakepicturesintotalquietnessKyotoArashiyamaTravelGuiderecommendshittingthefamousBambooGrovePathasearlyinthemorningaspossible﹣think7a.m.ifyou'reupforit.Don'tmissthesehiddentreasuresyoucanonlywitnessinJapan.ChichenItza:YucatánMexicoHometoE1CastilloandtheTempleoftheWarriorsChichenItzaisamust﹣see.Wanttobeattherush?Scheduleanearlytourthattakesplacebeforeasiteopenstothepublic.Ledbyanarchaeologistguideit'sfulloffascinatinginsightsandfacts﹣withouttonsofpack﹣wearingtourists.LouvreMuseum:ParisFranceTheLouvreisoneofthemostpopularmuseumsontheplanet.Ifwaitingaroundinlinetogetinisn'tthewayyouprefertospendyourtimeinParisconsiderpurchasingareservedticket.Thiswillgiveyouentrytothepyramidwithinahalf﹣hourwindow.TheLouvreisalsoopenuntil9:45p.m.onWednesdaysandFridaysifyou'reupforsomelate﹣nightartvisits.1WhatisrecommendedatVaticanMuseumsbyChristieHudson?A.Queuingfourhours.B.Jumpingthewaitingline.C.Takingaskip﹣the﹣linetour.D.VisitingtheSistineChapel.2Whichofthefollowingareavailableforearlytouriststoavoidtherush?A.VaticanMuseumsandBambooForest.B.ChichenItzaandBambooForest.C.BambooForestandLouvreMuseum.D.ChichenItzaandLouvreMuseum.3Whomightthispassagebeintendedfor?A.Visitorsinterestedinmuseums.B.Guidesatthetouristattractions.C.Peopleattheticketcounter.D.Touriststobeattherush.
已知函数fx的导函数f′x满足x+xlnxf′x>fx对x∈1+∞恒成立. 1判断函数gx=在1+∞上的单调性并说明理由 2若fx=ex+mx求m的取值范围.
假如你是校英文报编辑李华.你校原定于本星期五下午在302室举办的英文经典片段配音比赛EnglishDubbingContest因故需更改时间和地点.请你写一封电子邮件通知评委中的外教Mrs.Jenkins内容包括: 1.比赛更改原因; 2.更改后的安排; 3.表达歉意. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯.
若函数fx=1+|x|+则flg2+flg+flg5+flg=.
Theworldisagreenerplacethanitwas20yearsago.Astudypublishedinthejournal'NatureSustainability'saidthatrecentsatellitedatarevealsagreeningpatternthatisstrikinglyprominentinChinaandIndia.ThestudyshowsthathumanactivityinChinaandIndiadominatesthisgreeningoftheplanetthankstotreeplantingandagriculture.Theeffectcomesmostlyfromambitioustree﹣plantingprogramsinChinaandintensiveagricultureinbothcountries.'ChinaandIndiaaccountforone﹣thirdofthegreening'saidleadauthorChiChenofBostonUniversity.'Thatisasurprisingfindingconsideringthevagueideaoflanddegradation毁坏inpopulouscountriesfromoverexploitation'addedChen.Chinaaloneaccountsfor25percentoftheglobalnetincreaseinleafareawithonly6.6percentofglobalvegetatedarea.ThegreeninginChinaisfromforests42percentandcroplands32percentbutinIndiaitismostlyfromcroplands82percentwithminorcontributionfromforests4.4percent.China'soutsizedcontributiontotheglobalgreeningtrendcomesinlargepartfromitsprogramstoconserveandexpandforestswiththegoalofpreventinglanddegradationairpollutionandclimatechange.'Oncepeoplerealizethereisaproblemtheytendtofixit'saidRamaNemaniresearchscientistandco﹣authorofthestudy.'Inthe1970sand80sinIndiaandChinathesituationaroundvegetationlosswasnotgood.Inthe1990speoplerealizeditandtodaythingshaveimproved.Nowweseethathumansarecontributing.'LandareausedtogrowcropsiscomparableinChinaandIndia﹣morethan770000squaremiles﹣andhasnotchangedmuchsincetheearly2000s.Yettheseregionshavegreatlyincreasedboththeirannualtotalgreenleafareaandtheirfoodproduction.Thiswasachievedthroughmultiplecroppingpracticeswhereafieldisreplantedtoproduceanotherharvestseveraltimesayear.Productionofgrainsvegetablesfruitsandmorehaveincreasedbyabout35%~40%since2000tofeedtheirlargepopulations.1Whatdidthestudymainlyfind?A.IndiaandChinaareleadingtheglobalgreeningeffort.B.Intensiveagricultureisthecauseofgloballanddegradation.C.ChinaandIndiahasgotthelargestforestcoverageintheworld.D.Agricultureismorehelpfulinexpandinggreenareasthantree﹣planting.2HowisChinadifferentfromIndiaincontributingtotheglobalgreening?A.Indiareducedcroplandtopreventtheoverexploitation.B.Indiaincreasedforestbyplantingaroundcroplands.C.Chinachangedmorelandsintoforestbyplantingtrees.D.Chinacontrolledtheincreaseofitspopulation.3WhatdoesNemanithinkabouthumansinChinaandIndiainprotectingtheEarth?A.Ambitious.B.Responsible.C.Passionate.D.Tolerant.4Whatdoesthepassagefinallysuggesthumansshouldmakegooduseof?A.Forest.B.Trees.C.Cropland.D.Food
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意:1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. Ibecameinterestinginplayingfootballthankstoasmallaccident.OneafternoonwhereIwasinprimaryschoolIwaswalkingbytheschoolplayground.Suddenlyfootballfelljustinfrontofmebutalmosthitme.Istoppedtheballandkickedithardlybacktotheplayground.Toeveryone′ssurprisingtheballwentintothenet.AllthefootballplayerontheplaygroundcheeredloudlysaythatIhadatalentforfootball.FromnowonIstartedtoplaymyfootballwithclassmatesafterschool.Iamagoodplayernow.
ThesmalltownofRjukaninNorwayissituatedbetweenseveralmountainsanddoesnotgetdirectsunlightfromlateSeptembertomid﹣March﹣1sixmonthsoutoftheyear. Ofcoursewe2itwhenthesunisshiningsaysKarinRowhoworksforthetown'stourismoffice.Weseetheskyis3butdowninthevalleyit'sdarker﹣it'slikeona4day. Butthat5whenasystemofhigh﹣tech6wasintroducedtoreflectsunlightfromneighboringpeaks山峰intothevalleybelow.Wednesdayresidents居民ofRjukan7theirveryfirstrayofwintersunshine:Arowofreflectiveboardsonanearbymountainsidewereputto8.Themirrorsarecontrolledbyacomputerthat9themtoturnalongwiththesunthroughoutthe10andtocloseduringwindyweather.Theyreflectaconcentratedbeam束oflightontothetown'scentral11creatinganareaofsunlightroughly600squaremeters.Whenthelight12Rjukanresidentsgatheredtogether. Peoplehavebeen13thereandstandingthereandtaking14ofeachotherRosays.Thetownsquarewastotally15.Ithinkalmostallthepeopleinthetownwerethere.The3500residentscannotall16thesunshineatthesametime.17thenewlightfeelslikemorethanenoughforthetown's18residents. It'snotvery19shesaysbutitisenoughwhenweare20. 1A.only B.obviously C.nearly D.precisely 2A.fear B.believe C.hear D.notice 3A.empty B.blue C.high D.wide 4A.cloudy B.normal C.different D.warm 5A.helped B.changed C.happened D.mattered 6A.computers B.telescopes C.mirrors D.cameras 7A.remembered B.forecasted C.received D.imagined 8A.repair B.risk C.rest D.use 9A.forbids B.directs C.predicts D.follows 10A.day B.night C.month D.year 11A.library B.hall C.square D.street 12A.appeared B.returned C.faded D.stopped 13A.driving B.hiding C.camping D.sitting 14A.pictures B.notes C.care D.hold 15A.new B.full C.flat D.silent 16A.block B.avoid C.enjoy D.store 17A.Instead B.However C.Gradually D.Similarly 18A.nature﹣loving B.energy﹣saving C.weather﹣beaten D.sun﹣starved 19A.big B.clear C.cold D.easy 20A.trying B.waiting C.watching D.sharing
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