首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
为了得到函数y=sin(2x﹣)的图象,可以将函数y=sin2x的图象( )
查看本题答案
包含此试题的试卷
高二下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
为了得到函数y=sin2x﹣的图象可以将函数y=cos2x的图象
向右平移
个单位长度
向右平移
个单位长度
向左平移
个单位长度
向左平移
个单位长度
为了得到函数y=sinx+1的图象只需把函数y=sinx的图象上所有的点
向左平行移动1个单位长度
向右平行移动1个单位长度
向左平行移动π个单位长度
向右平行移动π个单位长度
为了得到函数y=2sinx∈R的图象只需把函数y=2sinxx∈R的图象上所有的点经过怎样的变换得到
要得到函数y=sin的图象可以把函数y=sin2x的图象
向左平移个单位
向右平移个单位
向左平移个单位
向右平移个单位
已知向量a=mcos2xb=sin2xn设函数fx=a·b且y=fx的图象过点和点.1求实数mn的值
已知向量a=mcos2xb=sin2xn函数fx=a·b且y=fx的图象过点和点.1求mn的值2将y
为了得到函数y=sin的图象只需把函数y=sin2x的图象上所有的点
向左平行移动
个单位长度
向右平行移动
个单位长度
向左平行移动
个单位长度
向右平行移动
个单位长度
已知函数y=gx的图象由fx=sin2x的图象向右平移φ0<φ<π个单位得到这两个函数的部分图象如图
要得到函数y=sin2x﹣的图象可将函数y=sin2x的图象向右平移个单位.
为了得到函数y=sin2x-的图象可以将函数y=cos2x的图象
向右平移
个单位长度
向右平移
个单位长度
向左平移
个单位长度
向左平移
个单位长度
有下列说法①函数y=-cos2x的最小正周期是π②终边在y轴上的角的集合是③在同一直角坐标系中函数y
为了得到函数y=sin2x﹣的图象可以将函数y=sin2x的图象
向右平移
个单位长度
向左平移
个单位长度
向左平移
个单位长度
向右平移
个单位长度
为了得到函数y=sin的图象可以将函数y=cos2x的图象
向右平移
个单位长度
向右平移
个单位长度
向左平移
个单位长度
向左平移
个单位长度
已知下列函数①y=x2②y=﹣x2③y=x﹣12+2.其中图象通过平移可以得到函数y=x2+2x﹣3
将函数y=sin2x+cos2x的图象向左平移个单位长度所得图象对应的函数解析式可以是.
y=cos 2x+sin 2x
y=cos 2x-sin 2x
y=sin 2x-cos 2x
y=sin xcos x
将函数y=3sin2x的图象向左平移个单位长度所得图象的函数解析式为.
将函数y=fx·sinx的图象向右平移个单位后再作关于x轴对称变换得到函数y=1-2sin2x的图象
sin x
cos x
2sin x
2cos x
已知fx=sin+x∈R..1求函数fx的最小正周期和单调增区间.2函数fx的图象可以由函数y=si
为了得到函数y=sin的图象可以将函数y=cos2x的图象
向右平移
个单位长度
向右平移
个单位长度
向左平移
个单位长度
向左平移
个单位长度
作一次函数y=2x-4的图象时我们还可以采用________法作图即先作出直线y=2x的图象然后将直
热门试题
更多
如图中abcde为元素周期表中前四周期的一部分元素下列有关叙述正确的是
燃料电池的基本组成为电极电解质燃料和氧化剂.此种电池的能量利用率可高达80%产物污染也少.下列有关燃料电池说法错误的是
下列各分子中所有原子都满足最外层为8电子结构的是
下图所示的实验能达到实验目的是
Thetermtoextendanolive橄榄branchmeanstomakeanofferofpeaceorreconciliation和好.ThistermhasBiblicalshèng jīng 的originscomingfromthesectionoftheOldTestamentthatdealswiththefloodthesignthatthefloodisoverisanolivebranchbroughtbacktotheark方舟byadove.OlivebrancheswerealsosymbolsofpeaceinAncientGreeceandRomeandtheycontinuetobeusedinvariousworksofartthataremeanttosuggestpeace. Somepeoplehavesuggestedthattheolivewasaverydeliberateandwell﹣consideredchoiceasametaphor比喻forpeacebecauseolivetreesfamouslytakeyearstomature.Waristypicallyveryhardonthetreesbecausepeoplecannottakethetimetonurturethemandplantnewones.Thereforetheofferofanolivebranchwouldsuggestthatsomeoneistiredofwarwhetheritisanactualwarorafallingoutbetweenfriends. InAncientGreekandRomantimespeoplewouldofferactualolivebranches.InRomeforexampledefeatedarmiestraditionallycarriedolivebranchestoindicatethattheyweregivinginandtheGreeksusedthemintoweddingsandotherceremonies.Inthemodernerathebranchisusuallymetaphoricalratherthanactualnotleastbecausetheplantscanbeabitdifficulttoobtain. Manypeopleagreethatpeacenegotiationsatalllevelsofsocietyareagoodidea.Betweennationsobviouslyitisimportanttoextendanolivebranchtoensuremutualsafetyandtohelptheworldrunmoresmoothly.Thisactcanalsobeimportantonapersonallevelasresolvingconflictandlearningtogetalongwithothersisviewedasanimportantlifeskillinmanycultures. Atsomepointintheirlivesmanypeoplewillbeadvisedtoextendanolivebranchtosettleadisputeorresolveanissue.Somepeoplebelievethatittakesanimmenseamountofcouragetotakethisactionasitoftencomeswithanadmissionofwrongdoingandregret. 32.AccordingtotheBible. A.anolivebranchsuggestsfloodiscoming B.thearkismadeofolivetreewood C.anolivebranchmeansfloodisover D.adovelovestosettleontheolivebranch 33.TheoliveisconsideredagoodchoiceasametaphorforpeaceforthefollowingreasonsEXCEPT. A.olivetreesfamouslytakeyearstomature B.olivebranchesmakepeopletiredofwar C.waristypicallyveryhardonthetrees D.peoplecannottakethetimetonurturethemwhileatwar 34.Whyareactualolivebranchesseldomusedinmoderntimes? A.Olivetreesarebeingprotectednow. B.Olivetreesareplantedonlyincertaincountries. C.Olivetreescanbefartoseek. D.Thereisnoneedtouserealolivebranches. 35.Itcanbelearnedfromthetextthattoextendanolivebranch. A.isnotimportantonapersonallevel B.isonlyimportantbetweennations C.takesalotofcourage D.isanimportantlifeskillinmanycultures.
函数在[24]上的最大值为
Listedherearefourofthethousandsofimpressivemuseumsaroundtheworld. TheGuggenheimMuseumBilbaoinBilbaoSpain Builtin1997theGuggenheimMuseumBilbaoisoneofthenewestintheworld.IthastransformedtheindustrialcityofBilbaointoatraveler'sdesireddestination.Thebeautifularchitectureofthemuseumhasprovidedadramaticbackgroundformoviesandcommercials. TheLouvreinParisFrance ProbablythemostfamousLouvrealsoholdsthemostfamouspaintingintheworldtheMonaLisabyLeonardodaVinci.Crowdscanbefoundanydaysurroundingthesmallbutmysteriouspaintingofthesmilingwoman.ButtheLouvreismuchmorethanahometotheMonaLisa.TheLouvreisvisitedbymorepeopleeachyearthananyothermuseumintheworld. TheBarnesFoundationinPhiladelphiaAmerica Justopenedinitsnewdowntownlocationin2012theBarnesFoundationisuniqueinthatitisacompletelyreproduceddisplayfromoneman'sprivatecollection.Dr.AlbertC.Barnesstartedcollectingartintheearly20thcenturyandcollectedamongothersthelargestnumberoforiginalRenoirpaintingsintheworld. TheUffiziGalleryinFlorenceItaly Walkingonthemarbledfloorsfeelslikesteppingbackintime.Thebuildingitselfisabeautifulpalace﹣likestructurewithfrescoes湿壁画decoratingtheceilingsandwalls.Viewersarebowledover印象深刻bytheworksbyBotticellisuchasTheBirthofVenus.Classicartworksfromnearly1000yearsagodescribereligiouseventsofthetime. 21.Whichofthefollowingisthemostpopular? A.TheLouvre. B.TheGuggenheimMuseumBilbao. C.TheBarnesFoundation. D.TheUffiziGallery. 22.WhatmakestheBarnesFoundationparticular? A.Itsstructure. B.Itscollection. C.Itslocation. D.Itshistory. 23.Whattypeofwritingisthistext? A.Anactivityposter. B.Anexhibitionannouncement. C.Anartshowreview. D.Atravelguide.
Ihadbeenstaringatthewhitewallsofthevideogamestoreforabout2hourssincelunch.Itwasavery41day.Iglancedatthetableinfrontofthestoreandmyheart42.ItwasthedonationtableforthevictimsofTyphoonYolandaandeventhoughIhaddonatedwhatIcouldI43feltsadwheneverIsawthepeopleontheTVsuffering. Iwasbrokenoutofmy44whenthedoorsgotopen.Customers45! Shewasasmallgirlabout10or11.Hermotherwasaccompanyingherwithafewplasticbags.I46hermom.WhenIwassellingcigarettesonthestreetIsawhersellingclothesshe47herselfatthemarket. Thedaughterjusthada48andhermomfinallyhad49moneytobuyaPS3andsomegames. Thegirlhalf﹣joggedhalf﹣skippedtomycounter.She50herbackpackandpulledoutaconsole操纵板.Hermomhandedmethebagfullofgames. CanI51this? Suresweetienoproblem. Iinspectedtheconsoleandthegamesandnothingwasopened.Accordingtoour52Ireturnedthe53tothemom.Shehandedittothegirl.Andthegirlranoffasfastasherlittlefeetcouldtakeher.Iwasabouttoaskwhenthemomseeingmy54explainedShewantstosellherbirthday55soshecandonatetothe56. Shewas57togiveupwhatwassupposedtobehersandgavetothose58.That'srealgenerosityoutthere. 59IwaswatchinghertalkingtothegirlatthedonationstableIwasremindedthateventhoughtherearealotof60peopleintheworldtherearestillthosepeoplejustlikethatlittlegirl. 41.A.good B.cold C.warm D.slow 42.A.beat B.ached C.ran D.sank 43.A.almost B.also C.still D.never 44.A.moods B.dreams C.pains D.thoughts 45.A.firstly B.finally C.quickly D.excitedly 46.A.greeted B.found C.recognized D.told 47.A.wore B.made C.washed D.bought 48.A.date B.job C.birthday D.disease 49.A.enough B.little C.easy D.big 50.A.carried B.opened C.sold D.left 51.A.buy B.change C.return D.donate 52.A.plan B.decision C.discussion D.regulation 53.A.money B.backpack C.games D.receipt 54.A.smile B.expression C.unhappiness D.difficulty 55.A.card B.cake C.surprise D.gift 56.A.victims B.workers C.charities D.typhoons 57.A.grateful B.willing C.unhappy D.afraid 58.A.poor B.unfortunate C.indanger D.inneed 59.A.Since B.Until C.While D.Although 60.A.selfish B.unlucky C.poor D.rich
SashaObamadaughterofUSPresidentBarackObamahasswappedthecomfortsoftheWhiteHousefor61seafoodrestaurant. The15﹣year﹣old62takeasummerjobservingfoodatthebusinessinMartha'sVineyardMassachusettsrecently.Sashausing63fullnameNatashahasbeenaccompaniedtotherestaurantbyateamofsixsecretserviceagentstheBostonHeraldreports. Thetownhasbeenafavorite64locatefortheObamasontheirsummerbreaks.Photographsshowthepresident'syoungestdaughter65weartherestaurant'suniformofblueT﹣shirtandcapandworkingatatill在收银. Aco﹣workertoldtheHeraldShe'sbeenworkingdownstairsattakeout.Wewerewondering66thereweresixpeoplehelpingthisgirlbutthenwefound67whoitwas. TheWhiteHousehasnotcommentedonthereportbutFirstLadyMichelleObamahasspokenabouttryingtobringhertwodaughtersupas68normalaspossible. AswellasworkingonthetakeawaycounterSashaObama'sother69dutyreportedlyincludewaitingontablesandhelpingtopreparetherestaurantforitslunchtimeopening. Hersecurityteamhasbeenseenwaitingnearbyinalargecarorsittingonbenches70theFirstDaughterdealswithtourists'meals.
WarmweatherbroughtbyElNinohashadmixedeffectsonanimalsinusuallysnowyplacesinNorthAmericaincludingNewEnglandaccordingtoanAssociatedPressarticle. Someanimalsseemtobenefitfromhavingachancetogathermorefoodbeforewinterandfromexpendinglessenergyindailysurvivalmode.Otherslikesnowshoeharesareputatcenterstageinpredators'捕食者viewwhentheylacksnowfordisguisingtheirwhitefur﹣notagodthingforthemofcourse. Blackbearsontheotherhandhavebeenkeepingbusygatheringnutsandappleswhentheywouldnormallyhavesettledintotheirwinterhomesbynow.VermontandMassachusettsofficialshaveaskedresidentstowaittillsnowfallstotakeouttheirbirdfeedersforthesakeofsafetythearticlesaid. Wesuggestwaitingfor6ormoreinchesofsnowthatlastsbeforetakingoutyourbirdfeedersespeciallyifyouhavebeenvisitedinthepastbybearsoriftherearesightingsofbearsinyourneighborhoodForrestHammondVermontFishandWildlife'sbearbiologistsaidinthearticle.Duetolackofsnowandfrozengroundbirdsareabletoseekfoodinfieldsandforestsfortheirnaturalfoods. Snowamountscanalsodeterminehowcomfortablebearsareandhowquicklytheyconsumetheiraccumulatedfatduringhibernation冬眠notedHammondinthearticle.Thisisbecausesnowcoversandtrapsthemintheirwinterhomesandalsohidesthemfrompredators. 28.WhatmayupsetsnowshoeharesbecauseofElNino? A.Theirbeingcaughtmoreeasily. B.Theirfailingtogathermorefood. C.Theirconsumingmoreenergy. D.Theirlosingsightoftheirenemies. 29.Whydidtheofficialsaskpeopletokeepbirdfeedersuntilsnowfalls? A.Theymanydisturbbears. B.There'snoneedtodoso. C.Toavoidattractingbears. D.Forthesafetyofbears. 30.Whatdothebearbiologist'swordsimply? A.Aheavysnowisontheway. B.Bearsarecommonnowadays. C.Bearslivemainlyonbirdsinwinter. D.Warmweatherbenefitsbirdsinwinter. 31.Whichofthefollowingisthepropertitleforthepassage? A.WarmWeatherHelpsAnimalsSurvive B.SnowAmountsDetermineAnimals'WinterLife C.MeasuresShouldBeTakenToProtectWildlife D.LackofSnowAffectsNorthAmericanAnimals.
已知反应A+3B⇌2C+D在某段时间内以A的浓度变化表示的化学反应速度为1mol•L﹣1•min﹣1则此段时间内以C的浓度变化表示的化学反应速率为
Peoplelieallthetimebutdependingonhowskilledtheyare.Itcanbedifficulttodeterminewhensomeoneislyingtoyou.Doyouknowhowtorecognizethesignsthatsomeoneislyingtoyou?36 1.Liarsmakefalseeyecontact. Apersonwhoislyingtoyouwon'tmakeeyecontactwithyouortheymaketoomucheyecontact.Ifapersonislyinghemayfeelyouarewatchinghimandhewilllookdownatthefloororawayfromyoureyes.Somepeopletrytostareatyouinthefaceinadeliberateway.37 2.Liarsavoidusingcontractions缩略语 TheliarswillsayIdidNOTnoticeyourmoneyinsteadofIdidn'tnoticeyourmoney.Thisisanattemptbytheliarstobeabsolutelyclearwhattheymean.38 3.WeirdStrangeBodyLanguage. Liarsoftenfeeluneasyturnawayfromthepersontowhomtheyarespeakingblinkrapidlysmilelessandhavepitchchangesintheirtoneofvoice.Theymaycrosstheirarmswhichisasignofbeingclosedortryingnottorevealtoomuchinformation.39.Theycouldtouchpartsoftheirfaceanearoranoseorplaywithkeysoranotheritemthattheyhaveintheirhand. 4.Liarsprovideadditionalinformationwithoutbeingaskedforit. 40.Theresultisthemorecomplicatedthestoryisthelessbelievableitwillbe.Youwillhavethefeelingthatnothingcouldbefurtherfromthetruth. A.Usuallyitendsupmakingthestoryalotlessbelievable. B.Herearesomeeasywaystohelpyourecognizeliarsandcatchlies. C.Sometimespeoplewilllookunnaturalwhentheyarelying. D.Theywillgetangryifyoudoubttheirstory. E.Theyseemtothinkthatbytellingtheirstoryindetailyouwillfinditmorebelievable. F.Theytrytochangethesubjectormovetheconversationinadifferentdirection. G.Inthiswaytheyfeellikemakingeyecontactwillmakewhattheyaresayingmorebelievable.
杨辉三角又称帕斯卡三角是二项式系数在三角形中的一种几何排列.在我国南宋数学家杨辉所著的详解九章算法一书中用如图所示的三角形解释二项展开式的系数规律.现把杨辉三角中的数从上到下从左到右依次排列得数列111121133114641….记作数列{an}若数列{an}的前n项和为Sn则S68=.
在一定温度下的恒容密闭容器中能说明反应X2g+Y2g⇌2XYg已达到平衡的是
假设你是李华尽管你很努力但在最近的英语考试中又不及格你很烦恼父母和老师对此也有些担心.请给你的英国笔友Tom写一封电子邮件告诉他你的情况并向他求助如何学好英语.邮件要点如下 1.向Tom倾诉你的烦恼 2.请教他如何学好英语. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头和结尾已为你写好不计入总词数. DearTom Howareyou? Iamlookingforwardtoyourreply. Yours LiHua.
硫代硫酸钠溶液与稀硫酸反应的化学方程式为Na2S2O3+H2SO4=Na2SO4+SO2+S↓+H2O下列各组实验中最先出现浑浊的是
设随机变量ξ服从正态分布N122Pξ>2=0.3则P0<ξ<1=
已知可导函数fx的导函数为f'x若对任意的x∈R都有fx>f'x+1且fx-2019为奇函数则不等式fx-2018ex<1的解集为
氢氧燃料电池是符合绿色化学理念的新型发电装置.图为电池示意图该电池电极表面镀一层细小的铂粉铂吸附气体的能力强性质稳定.请回答 1氢氧燃料电池的在导线中电流的方向为由用ab表示. 2负极反应式为正极反应式为. 3该电池工作时H2和O2连续由外部供给电池可连续不断提供电能.因此大量安全储氢是关键技术之一. 金属锂是一种重要的储氢材料吸氢和放氢原理如下 Ⅰ.2Li+H22LiH Ⅱ.LiH+H2O═LiOH+H2↑ ①反应Ⅰ中的还原剂是反应Ⅱ中的氧化剂是. ②已知LiH固体密度为0.82g•cm﹣3用锂吸收224L标准状况H2生成的LiH体积与被吸收的H2体积比为. ③由②生成的LiH与H2O作用放出的H2用作电池燃料若能量转化率为80%则导线中通过电子的物质的量为mol.
1+x1-x6的展开式中x5项的系数为.
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. 删减把多余的词用斜线\划掉. 修改在错词下面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. LastFridayourschoolorganizedustoafirestationwhatwehadexpectedforseveralday.Whenwegottherethefire﹣fighterswelcomedusbutledusintoanexhibitionhall.Thereoneofthemdeliveredthelectureonfirecontroltous.Afterthattheyshowushowtooperateafireextinguisherandevengaveourchancestopractiseusingit.NowIdaresayIcanuseitskillful!Onourwayhomewecouldn'thelptotalkingaboutwhatwehadexperienced.Wefeltveryhappyandexcitedbecausewehadgainedsomanyknowledgeaboutfirecontrolandknownwhattodoanemergency.
下列反应属于取代反应的是
函数y=x2-1e|x|的图象大致是
已知离散型随机变量X服从二项分布X~B6p且EX=1则DX=
下列叙述正确的是
在2L密闭容器内800℃时发生反应2NOg+O2g═2NO2g在体系中nNO随时间的变化如表 1上述反应填“是”或“不是”可逆反应在第5s时NO的转化率为. 2如图中表示NO2变化曲线的是.用O2表示从0~2s内该反应的平均速率v=. 3能说明该反应已达到平衡状态的是. a.vNO2=2vO2 b.容器内压强保持不变 c.v逆NO=2v正O2 d.容器内气体密度保持不变.
某电子管正品率为次品率为现对该批电子管进行测试那么在五次测试中恰有三次测到正品的概率是
①②③④四种金属片两两相连浸入稀硫酸中都可组成原电池①②相连时外电路电流从②流向①①③相连时③为正极②④相连时②上有气泡逸出③④相连时③的质量减少.据此判断这四种金属活动性由强到弱的顺序是
下列说法中不正确的是 ①质子数相同的微粒一定是同种元素 ②同位素的化学性质基本相同 ③质子数相同电子数也相同的两种微粒不可能是一种分子和一种离子 ④电子数相同的微粒不一定是同一种原子 ⑤某种元素的相对原子质量取整数就是其质量数.
下列各图中表示正反应是吸热反应的图是
热门题库
更多
高二下学期数学
高二上学期化学
高二下学期物理
高三下学期物理
高三上学期物理
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库