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函数f（x）是定义在R上的奇函数，对任意两个正数x1，x2（x1＜x2）都有，记，则a，b，c之间的大小关系为（ ）
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高三下学期数学《》真题及答案
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设函数fx＝2sin若对任意x∈R.都有fx1≤fx≤fx2成立则|x1－x2|的最小值为_____
已知函数fx的定义域为R且对任意的实数x导函数f’x满足0＜f’x＜2且f’x≠1．常数c1为
定义在R上的奇函数fx对任意x∈R都有fx=fx+4当x∈﹣20时fx=2x则f2015﹣f2014
已知函数fx的定义域为R.对于任意的xy∈R.都有fx+y=fx+fy且当x＞0时fx＜0若f﹣1=
若定义在R.上的函数fx满足对任意x1x2R有fx1+x2=fx1+fx2+1则下列说法一定正确的是
f(x)为奇函数
f(x)为偶函数
f(x)+1为奇函数
f(x)+1为偶函数
已知函数fx的定义域为R且对任意的实数x导函数f′x满足01若对任意的闭区间［ab］R总存在x0∈
给定程序中函数fun的功能是根据形参i的值返回某个函数的值当调用正确时程序输出x1=5.000000
设x1x2为y＝fx的定义域内的任意两个变量有以下几个命题①x1－x2[fx1－fx2]>0②x1－
定义对于函数fx若在定义域内存在实数x满足f﹣x=﹣fx则称fx为局部奇函数.1已知二次函数fx=a
定义对于函数fx若在定义域内存在实数x满足f﹣x=﹣fx则称fx为局部奇函数.1已知二次函数fx=a
设fx是定义在R.上的任意一个增函数F.x=fx－f－x那么F.x是
增函数且为奇函数
增函数且为偶函数
减函数且为奇函数
减函数且为偶函数
设函数fx是定义在R.上的奇函数对任意实数x有成立若f1＝2则f2＋f3＝.
定义在R.上的函数fx满足对于任意αβ∈R.总有fα＋β－[fα＋fβ]＝2010则下列说法正确的是
f(x)－1是奇函数
f(x)＋1是奇函数
f(x)－2010是奇函数
f(x)＋2010是奇函数
若函数fx满足对于任意x1x2>0都有fx1>0fx2>0且fx1＋fx2
已知函数fx=x-a2x-bab∈Ra
对任意的x∈R.定义在R.上的奇函数fx满足fx+3=﹣fx+4则f1000=
﹣1
1
0
1000
已知定义在R.上的函数fx＝x2＋ax＋b的图象经过原点且对任意的实数x都有f1＋x＝f1－x成立.
给出以下命题:①函数fx=|log2x2|既无最大值也无最小值;②函数fx=|x2-2x-3|的图象
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化学与人类生活密切相关．下列说法正确的是
金属蚀刻加工过程中常用盐酸对其表面氧化物进行清洗会产生酸洗废水．pH在1.5左右的某酸洗废水中含铁元素质量分数约3%其他金属元素如铜镍锌铬浓度较低工业上综合利用酸洗废水可制备三氯化铁．制备过程如下 相关金属离子生成氢氧化物沉淀的pH如下表所示 回答下列问题 1“中和”时发生反应的化学方程式为调节pH至范围有利于后续制备得纯度较高的产品． 2酸溶处理中和后的滤渣使铁元素浸出．滤渣和工业盐酸反应时不同反应温度下铁浸出率随时间变化如图a所示可知酸溶的最佳温度为．按照不同的固液比滤渣和工业盐酸的投入体积比进行反应时铁浸出率随时间变化如图b所示实际生产中固液比选择1.51的原因是． 3氧化时可选氯酸钠或过氧化氢为氧化剂若100L“酸溶”所得溶液中Fe2+含量为1.2mol•L﹣1则需投入的氧化剂过氧化氢的质量为． 4氧化时除可外加氧化剂外也可采用惰性电极电解的方法此时阴极的电极反应式为电解总反应的离子方程式是． 5将得到的FeCl3溶液在HCl气氛中过滤洗涤干燥得FeCl3•6H2O晶体．
FeSO4是一种补血剂常温下久置易变黄一般认为是Fe2+被氧化为Fe3+的缘故． 1已知 ①Fe2+aq﹣e﹣＝Fe3+aq△H1＝akJ•mol﹣1 ②O2g+4e﹣+4H+aq＝2H2Ol△H2＝bkJ•mol﹣1 则FeSO4在酸性溶液中变质的热化学方程式为． 常温下配制不同pH的0．lmol•L﹣1FeSO4溶液研究溶液中Fe2+被氧化的情况结果如图所示假设反应过程中溶液体积不变． 2pH＝5.5的环境下反应在0～15min的平均速率vFe2+＝增大溶液pHFe2+被氧化速率填“增大”“减小”或“无影响”． 3平衡常数的计算中气态物质常以压强代替其浓度Fe2+在酸性环境下被氧化的平衡常数K的计算表达式是常温下该反应的平衡常数为2.5×1032L4•atm•mol4﹣1相对较大下列说法正确的是．填正确答案标号 a．Fe2+转化为Fe3+的趋势大b．Fe2+转化为Fe3+的速率大 c．反应进行得较为彻底d．酸性条件下Fe2+不会被氧化 4pH＝13的环境下Fe2+被氧化变质可以理解为 第一步Fe2++2OH﹣＝FeOH2↓ 第二步写化学方程式 当该氧化反应达到平衡时cFe2+/cFe3+4.0×1022填“＞”“＜”或“＝”．已知的Ksp[FeOH3]＝2.5×10﹣39Ksp[FeOH2]＝1.0×10﹣15． 5根据上述分析配制FeSO4溶液的正确方法是加入适量的铁粉和填试剂
Amaterialcanbereallyspecialwhenitwasnamedaftertheplacewhereit1createoriginally.That'certainlythecase2china.Andofalltypesofchinawhiteporcelain瓷isamongthemostfamous. Nowadaysthe3traditionmaterialhastakenonamodernlookinthe4handoffourChineseartistsintheModernWhitePorcelainExhibition.Andthekeywordhereismodern.Oneoftheworks5beaporcelainboat.Butlook6attentiveandyou'11seethattheboat7buildwithporcelainlookslikeatakeoutbox.Insidetheboatisastatueofababy.Thebabystandsforhumansandtheboatis8supportslife.Itsuggestswemayhavedonesomedamageto9environmentandthatwe'retreatinglifelikefastfood. Allthefourartistsgavewhiteporcelainamodemstyleeachin10theyownway.Andthisiswhattheexhibition'sthemecomesfrom.It'sadialoguebetweenthepastandthepresent.
Thereismoreofaconnectionbetweenfoodandculturethanyoumaythink.Onanindividuallevelwegrowupeatingthefoodofourculture.Itbecomesapartofwhoweare.Manyassociatefoodfromourchildhoodwithwarmfeelingsandgoodmemoriesandittiesustoourfamiliesholdingaspecialandpersonalvalueforus.Foodfromourfamilyoftenbecomesthecomfortfoodweseekasadultsintimesoffrustrationandstress. Onalargescaletraditionalfoodisanimportantpartofculture.Italsooperatesasanexpressionofcultureidentity.Immigrantsbringitwherevertheygoanditisasymbolofpridefortheircultureandmeansofcopingwithhomesickness. Manyimmigrantsopentheirownrestaurantsandservetraditionaldishes.Howeverthefooddoesnotremainexactlythesame.Somematerialsneededtomaketraditionaldishesmaynotbereadilyavailablesothetasteandflavorcanbedifferentfromwhattheywouldprepareintheirhomecountries.Additionallyimmigrantsdonotonlyselldishestopeoplefromthesamecountriesasthembuttopeoplefromdifferentcountries.Thereforetheyhavetomakesmallchangesabouttheoriginaldishestocatertoawiderrangeofcustomers.Thosechangescancreatenewflavorsthatstillkeeptheculturalsignificanceofthedishes. Weshouldembraceourheritage传统throughourculture'sfoodbutalsobecomemoreinformedaboutotherculturesbytryingtheirfood.Itisimportanttorememberthateachdishhasaspecialplaceintheculturetowhichitbelongsandisspecialtothosewhoprepareit.Foodisawindowintocultureanditshouldbetreatedassuch. 1What'sthefunctionoffoodmentionedinthearticle? A.Tohelpmotivatehomesickness. B.Toshownationalidentity. C.Toreflectacountry'shistory. D.Toshowacommunity'ssuperiority. 2WhatdoestheunderlineditinParagraph2referto? A.Thespecifictraditionalfood. B.Thenationalculture. C.Atraditionalexpressionoffood. D.Theold-fashionedtaste. 3Whydosomeimmigrantshavetochangetheoriginaldishesintheirrestaurant? A.Toattachculturalimportancetotheirdishes. B.Toannouncethebeginningoftheirlifeonforeignsoil. C.Tomakethedishespopularamongcustomers. D.Topresenttheirownfoodcultureinanewway. 4What'stheauthor'sattitudetowardsdifferentfoodcultures? A.Negative. B.Balanced. C.Unfair. D.Unchangeable.
SydneyStreetArtWalkingTour Youcangetamuchricherexperiencebytakinga2-hourwalkingtourinthecompanyofartistsanddesignerswhocanexplainthestoriesbehindthework.WanderthroughthestreetsofSydneyanddiscoveritsrichcultureofgraffitimuralismandtaggingwhilelearningabouttheartists.Meetandgetinsightfromlocalcharactersandtoasttheexperiencewithanincludedcraftbeer. SydneyBondiBeachWalkingTour ExperiencethesunsandandsurfatAustralia'smostpopularbeachwiththis1.5-hourwalkingtourofBondiBeach.SeewherethefamousBondiRescueTVshowisfilmedandlearnhowBondiBeachbecameahotspotfortouristssurfersandfamouspeople.AlongthewayadmiretheBondiAboriginalrockartsitesposeforphotosbytheBondiPavilion. SydneyVividLightWalkingTour MakethemostofVividLightSydney'sspectacularlightfestivalwiththissmallgroupwalkingtour.Overthecourseof2hoursyourlocalguidewillleadyouthroughthecity'sopen-airgalleryoflightequipmentstoppingatcelebratedworks.LearnabouttherichpastsofCircularQuayandTheRocksasyoumakeyourwaythroughthesehistoricneighborhoods. OperaHouseGuidedBackstageTour GetauniqueexperienceofOperaHouseonabackstagetourfortheperformingarts.Yourguidesharesstoriesaboutthereal-lifedramasbehindthecurtainandwell-knownhistory.Gobehindthescenestoseepartsoftheoperahousenormallyreservedforstaffandperformers.WrapupthisfascinatingmorningtourbysittingdownwithyourcompanionsforafullAustralianbreakfastintheGreenRoomwhereperformersrelaxbeforegoingonstage. 1Whocanhelpyouifyouwanttoappreciatethestreetart? A.Yourguide. B.Localpeople. C.Artistsanddesigners. D.Artstudents. 2WhatcanyoudoontheOperaHouseGuidedBackstageTour? A.Enjoyinterestingstories. B.Admiretherockartsites. C.WatchthefamousTVshow. D.Meetwell-knownperformers. 3Whichtourisbetterexperiencedduringthenight? A.SydneyStreetArtWalkingTour. B.SydneyBondiBeachWalkingTour. C.SydneyVividLightWalkingTour. D.OperaHouseGuidedBackstageTour.
化学与生产生活密切相关．下列物质的使用不涉及化学变化的是
WhilevisitingtheNorthpoleinwintermaynotbeatthetopofyourbucketlisttheever﹣changingICEHOTELwhichopeneditsdoorstovisitorsonDecember14thisyearmaychangeyourmind.200kmnorthoftheArcticCircleintheSwedishvillageofJukkasjārvithehotelwhichiscarvedentirelyfromiceisrebuiltannually. The35roomsbuilttoaccommodatevisitorsonallkindsofbudgetsvaryfromexpensivesuitestobasicroomsthatarefurnishedwithjustanicybedandareindeerskin.AmongthehighlightsthisyearistheSpruceWoodssuite.SculptedbyChristopherPascoeandJennieO'KeefeofCanadaitdescribesacampingscenecompletewithaclassicmicrobusaforestandevenanartificialcampfire. Thereisalsotheartfully﹣carvedLivingOceansuitetoremindvisitorsoftheimportanceofsavingouroceans.Theroomisfullofcarvedsealifethatincludescoralandasharkswimmingrightovertheicebed.Thesuiteisinspiredbyglobalwarmingandtheoverfishingthataffectsouroceans.saysartistJonathanPaulGreen.IalsothinktheideaofusingfrozenwaterfromariverinnorthernSwedentocreateanoceanwithshellsfishandcoralsisexciting. ThenearbyHavensuiteisamagicalgateoficeguardedbytwolargeanimals.WeareinspiredbythemeetingbetweenpeopleandwanttocreateanexperiencethatinvitescuriosityandcreativitysaysartistJonasJohansson.Itfeelslikeadreamtogettoworkwithicethatallowsourloveforlightshineandreflectiontowanderfreelyfromthoughttocreation. Regardlessofwhethervisitorsselectthecarvedsuitesorthebasiciceroomsthetemperatureisalwayssettoabone﹣chilling﹣5℃!Thatiswhyguestsareadvisedtosnuggle蜷缩upinsidesleepingbagsandwearglovesandwinterhatsallnight.Notsurprisinglymostendupspendingjustasinglenightatthisuniquehotelbeforemovingontotheconventionalandwarmerhotelsnearby. 1Whatdoestheunderlinedphrasebucketlistmeaninthetext? A.Ashoppinglistofbuckets. B.Alistoftravellingdestinations. C.Alistofexpensivehotels. D.Alistofexcitingideas. 2Whatcanweknowabouttheicehotel? A.Itisrebuilteveryyear. B.Itsroomsareexpensive. C.Itorganizescampingactivities. D.Itliesinacoastalcity. 3WheredoestheinspirationofLivingOceansuitecomefrom? A.Artandliterature. B.Oceanlifeandvoyage. C.Climatechangesandhumaninfluence. D.Themeetingofpeople. 4Whichofthefollowingisthebesttitleforthetext? A.AnAdventuretotheNorthPole B.AnExperienceClosetoNature C.ATasteofColdANightinaVillage D.AWinterDestinationSweden'sIceHotel
OnDec.6KelseyZwickboardedFlight588fromOrlandotoPhillywithLucyoneofher11-month-oldtwindaughters.Lucywasborn11weeksprematurely早产and1fromseverelungdiseaseasaresultofacomplication并发症ofthat.Thebravebabygirlwasonoxygen2untilrecently.TodayLucyneedsoxygenatnightandwhile3onesmallgooddeedremindedZwickhow4sheandherhusbandYuritrulyare. Tothe5in2D.Idon'tknowyoubutIimagineyousawus6.Iwaspushingastroller婴儿车hadadiaper尿布bagonmyarmandalso7anoxygenmachineformydaughterZwickwroteonherFacebookpost.We8theplanesatdowninourwindowseatandmade9tothosearoundusabouthavingtositbymyyelling-but-happybaby.Theflightattendantcameoverandtoldmeagentlemanwaswaitingto10seatsshewrote.Youweregivingupyourcomfortablefirst-classseattous.Notableto11tearsIcriedmywayupthe12whilemydaughterLucy13!Shefeltitinherbonestoo…realpuregoodness.Ismiledandthankedyouasweswitchedbutdidn'tgetto14youproperlythemomcontinued. So…thankyou.Notjustfortheseatitselfbutfor15.Forseeingusandrealizingthatmaybethingsarenot16easy.Fordecidingyouwantedtoshowarandomactof17tous.Ican'twaittotellLucysomeday.Inthemeantime…wewillpayit18. Zwick'sstorytouchedtheheartsofmanygivingriseto19commentsonthepostthathassincebeen20over164000times. 1A.recovers B.suffers C.results D.benefits 2A.test B.health C.survival D.support 3A.playing B.flying C.sleeping D.growing 4A.astonished B.amused C.blessed D.anxious 5A.man B.attendant C.assistant D.guide 6A.somewhere B.anywhere C.nowhere D.everywhere 7A.filling B.pumping C.following D.dragging 8A.booked B.reserved C.pre-boarded D.quit 9A.complaints B.comments C.offers D.jokes 10A.choose B.switch C.accept D.occupy 11A.burstinto B.giveback C.holdback D.breakinto 12A.passage B.airport C.flight D.pilot 13A.shouted B.crawled C.talked D.laughed 14A.meet B.thank C.recognise D.accept 15A.noticing B.donating C.reminding D.forgiving 16A.just B.right C.always D.ever 17A.forgiveness B.advantage C.kindness D.donation 18A.forward B.downward C.backward D.toward 19A.passive B.supportive C.possible D.negative 20A.made B.chosen C.researched D.shared
用Li石墨复合材料与Fe2O3纳米材料作电极的锂离子电池在循环充放电过程中实现对磁性的可逆调控．下列有关说法错误的是
IjustcountedhowmanyforeignlanguagesI'vestudiedsofarinmylifeandit'sbeentwelve! IalwaysfollowmyinterestsandfindwaystoputmylanguagelearningintothingsI'malreadyinterestedin.Iliketoreadblogs博客inotherlanguages.1.ForthemostpartbloggerstendtowritethesamewaytheyspeaksoIdon'thavetoworrymuchaboutadoptingstrangetermsthatareonlyusedinwriting. Moviesarealsoareallygoodtoolespeciallyifyoucanfindsubtitlesinthelanguageyou'relearning.2theywillstillkeepyourbrainlisteningandreadinginthesamelanguage.Musicisanotherwaytostartlisteningtothingsinyournewlanguage.PersonallyI'msobadatunderstandinglyrics歌词eveninEnglishsothisonedoesn'treallyworkformebutIhavefriendswholearnalanguagethroughlyrics.Gamesareofcoursealsoanexcellentwayofstudyinganewlanguage.Alotoflanguagelearningcomputerprogramsincludegames.I'msupercompetitiveandifIplayanyofthemIcanbehookedforhours.3. Whentheinitialexcitementoflearninganewlanguagebeginstofadeitcanbehardtostickwithit.ThehardestbitformeiswhenI'mcomfortableenoughwithalanguagetounderstandmostthingsandmakemyselfunderstood.I'mactuallystuckatthisstageinNorwegian.4.IdeallyIshouldsignuptotakeabiglanguageexam.EachtimeIstartgettingself﹣satisfiedit'stimetotakeanewcourseorsignupforonlinelessonsortakeupsomesortofchallengethatwillrequiremetolevelupmyskills. 5.ThebestlanguageclassI'veevertakenwasmybeginner'sRussiancourseatuniversitywheremyprofessorneverusedanyEnglish.ItgottothepointwhereIwouldkindofjustforgetaboutEnglishwhileinRussianclasswhichhelpedmetoreallyimmersemyselfintheRussianlanguageanddoawholelotwiththelimitedRussianIhad. A.That'sreallyuncomfortable B.Whateverlanguagesthey'retranslatedinto C.IalsotrytothinkinthelanguageI'mlearning D.It'stimewellspentifI'mlearningthelanguage E.Computergamesalwaysmakemefeelwornout F.Thoughtheydon'talwaysexactlymatchwhat'sbeingsaid G.Ifoundthemtheperfectlearningtoolbecausethey'reusuallywritteninorallanguage
AwomangraspedherphonetoherheartthewayaministermightholdaBible.Shewasanxioustotakeapictureofabunchofflowersthatsatnot10feetawaybutfirstshehadtogetthroughacrowdofotherspushingtodothesame.ThecauseofthiswasBouquetstoArtoneofthemostpopularannualeventsatthedeYoungMuseuminSanFrancisco.Forthe34thyearartistswereaskedtocreateflowerbunchesthatrespondtopiecesofartondisplayfromancientcarvingstocontemporarysculptures.It'stimetotakeaphototopostonInstagrambuttothepointthatithasbecomeaproblem. InrecentyearsthedeYoungreceivedmorethanathousandcomplaintsfrompeoplewhofeltthatcellphoneshadruinedtheirexperience.Infactinstitutionsoffineartaroundtheworldfacesimilarproblemsasthedesiretotakephotographsbecomesahugedrawformuseumsaswellassomethingthatupsetssomeoftheirvisitors.SothedeYoungrespondedwithakindofcompromisecarvingoutphotofreehoursduringtheexhibition'ssix-dayrun. Onecommoncomplaintintheongoingdebatesovertheeffectofsocialmediaonmuseumcultureisthatpeopleseemtobemissingoutonexperiencesbecausetheyaresobusycollectingevidenceofthem.ArecentstudyinthejournalPsychologicalSciencesuggeststhereissometruthtothisitfoundthatpeoplewhotookphotosofanexhibitratherthansimplyobservingithadahardertimerememberingwhattheysaw.Buttheissueiscomplicatedfortheprofessionalsrunningmuseums.LindaButlerthedeYoung'sheadofmarketingcommunicationsandvisitorexperienceacknowledgesthatnoteveryonewantsamuseumtobeaphoto-takingplayland.YetalotofotherpeopledoandshethinksthatthedeYoungisinnopositiontojudgethatonemotivationforbuyinga＄28ticketismorevalidthananother.Ifweremovedsocialmediaandphotographyshesayswewouldriskbecominglesspopular.Ifthisisabattlesignsindicatethatthepro-phonecrowd亲手机人群hasalreadywon. 1WhatwerethecrowdeagertodoinParagraph1? A.ToholdaBible. B.Toadmireflowers. C.Totakeaphoto. D.Toseetheexhibition. 2HowdidthedeYoungrespondtothecomplaints? A.Bysettingperiodswithoutphoto-taking. B.Bymakingtheexhibitionfreeofcharge. C.Bycompromisingwithotherinstitutions. D.Bygivingextratimetotakephotosfreely. 3Whatcanweinferabouttheuseofsocialmediainmuseumsaccordingtotherecentstudy? A.Ituncoversthetruth. B.Itaccumulatesevidence. C.Itcausescomplaints. D.Itplaysanegativerole. 4WhichofthefollowingmayLindaButlersupport? A.Cateringtovisitors. B.Reducingadmissionprices. C.Reservingjudgementinpublic. D.Banningsocialmediaandphotography.
微信热传的“苯宝宝表情包”可看作是由苯衍生的物质配以相应文字形成的如图．下列说法正确的是
室温下将1L0.3mol⋅L﹣1HA溶液与0.1molNaOH固体混合使之充分反应得到溶液a．然后向该溶液中通入HCl或加入NaOH固体忽略体积和温度变化溶液pH随通加入物质的量的变化如图．下列叙述错误的是
曾在南充求学和工作过的青年学者孙旭平及其领衔团队近日成功利用Mo2N纳米催化剂在0.1mol•L﹣1盐酸溶液中进行电催化固氮装置如图所示在一定电压下具有较高的产氨速率．下列判断错误的是
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