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曲线y＝lnx在点（1，0）处的切线方程为
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高三下学期数学《》真题及答案
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曲线y=3lnx+x+2在点P处的切线方程为4x﹣y﹣1=0则点P的坐标是．
曲线y=x3-2x+1在点10处的切线方程为______．
y=x-1
y=-x+1
y=2x-2
y=-2x+2
过点01作曲线y=lnx的切线则切线方程为________________________
曲线y＝x3lnx＋1在点11处的切线方程为________.
设函数y=fx由方程xy十2lnx=y4所确定则曲线y=fx在点11处的切线方程是______．
曲线y＝lnx在与x轴交点处的切线方程为________.
曲线y=x3lnx+1在点11处的切线方程为
y=﹣4x+3
y=﹣4x﹣3
y=4x+3
y=4x﹣3
曲线y=2lnx在点10处的切线方程为．
曲线y=lnx﹣x2在M.x0y0处的切线斜率为﹣1则此切线方程是
y=﹣x﹣2
y=﹣x﹣1
y=﹣x+1
y=﹣x
已知曲线y=lnx在点P处的切线经过原点则此切线的方程为
曲线y＝2lnx在点10处的切线方程为．
曲线y＝x3－2x＋1在点10处的切线方程为
y＝x－1
y＝－x＋1
y＝2x－2
y＝－2x＋2
曲线fx=xlnx在点10处的切线方程为.
曲线y＝lnx在点10处的切线方程为．
设函数fx=ax2lnx+bx﹣1x＞0曲线y=fx过点ee2﹣e+1且在点10处的切线方程为y=0
已知P.点在曲线F.y＝x3－x上且曲线F.在点P.处的切线与直线x＋2y＝0垂直则点P.的坐标为
(1,1)
(－1,0)
(－1,0)或(1,0)
(1,0)或(1,1)
在xoy坐标平面上连续曲线L过点M10其上任意点Pxyx≠0处的切线斜率与直线OP的斜率之差等于ax
.曲线y＝x3－2x＋1在点10处的切线方程为
y＝x－1
y＝－x＋1
y＝2x－2
y＝－2x＋2
已知曲线y=lnx在点P处的切线经过原点则此切线的方程为
曲线y=2x﹣lnx在点12处的切线方程是__________.
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10分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短文.短文中共有10处错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下画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. WelcometotheGreatWall.Measuredmorethan6000kilometersinlengththeGreatWallisknownasthelongwallintheworld.Ithasalonghistoryofmorethan2000years.ThatisamazingabouttheGreatWallisthatitismainmadeofstonesandbricksandalltheconstructionwasdonebyhand.ThoughitwasusedtoprotectthecountryfromforeigninvaderseveryfewhundredmetersalongwiththeGreatWalltherewasawatchtower.NowassymbolofChinatheGreatWallhadbecomeoneofthemostfamoustouristattractionintheworld.ItisnowonderthattheGreatWallattracthundredsofthousandsofforeigntouristseveryyear.
10分假定英语课.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. WelcometotheGreatWall.Measuredmorethan6000kilometersinlengththeGreatWallisknownasthelongwallintheworld.Ithasalonghistoryofmorethan2000years.ThatisamazingabouttheGreatWallisthatitismainmadeofstonesandbricksandalltheconstructionwasdonebyhand.ThoughitwasusedtoprotectthecountryfromforeigninvaderseveryfewhundredmetersalongwiththeGreatWalltherewasawatchtower.NowassymbolofChinatheGreatWallwillbecomeoneofthemostfamoustouristattractionsintheworld.ItisnowonderfulthattheGreatWallattracthundredsofthousandsofforeigntouristseveryyear.
30分Stevewasaseventhgraderabigboylookingmorelikeateenagerthana12﹣year﹣old.Yethewentunnoticed﹣﹣hehadbeen1everyexaminationsincefirstgrade一untilMissWilma. Inthemiddleofthefirstsemesterofschooltheentireseventhgradewas2forbasicskills. YoualldidprettywellMissWilmatoldtheclassaftergoingoverthe3.exceptforoneboy.Andit4myhearttotellyouthisbut..she5thesmartestboyintheseventhgradeisfailingmyclass.Steve6hiseyesandcarefullyexaminedhisfingertips. AfterthatStevestillwouldn'tdohishomework.EvenifMissWilma7punishedhimheremained8 Steveplease!Icareaboutyou! 9Stevegotit!SomeoneCARESABOUTME?! OneMondayacoupleofweekslaterMissWilmagavea10ontheweekendhomework.Steve11throughthetestandwasthefirsttohandinhispaper.Withalookof12MissWilma1ookhispaperandbegantolookitover. MissWilma'sfacewasin13shock!SheglancedupatStevethen14then up.Thesmartestboyintheseventhgradehadjustpassedhisfirsttest! FromthatmomentnothingwasthesameforSteve.Hediscoveredthatnotonlycouldherememberandunderstand15buthecouldtranslatewhathelearnedintohislife.Hebecame16 AfterhighschoolSteveenlistedintheNavyandhehadan17militarycareer.Duringhisnavalyearsheinspiredmanyyoungpeoplewhomightnothave18themselveswithouthim. A19tookplacewithintheheartofaboyallbecauseofoneteacherwho20. 1A.missing B.failing C.passing D.skipping 2A.tested B.classified C.separated D.dismissed 3A.questions B.effects C.lessons D.results 4A.fills B.presses C.breaks D.destroys 5A.shouted B.hesitated C.interrupted D.laughed 6A.dropped Braised C.covered D.closed 7A.strangely B.steadily C.severely D.secretly 8A.helpless B.stubbom C.flexible D.crazy 9A.Commonly B.Unwillingly C.Particularly D.Suddenly 10A.quiz B.chance C.speech D.presentation 11A.slept B.looked C.lived D.hurried 12A.disppointment B.surprise C.satisfaction D.inspiration 13A.btter B.total C.precious D.ridiculous 14A.down B.away C.out D.back 15A.homework B.grades C.knowledge D.subjccts 16A.outstanding B.lazy C.rough D.troublesome 17A.tiring B.ordinary C.hardworking D.successful 18A.reliedon B.lookedafter C.turnedto D.believedin 19A.competition B.choice C.change D.campaign 20A.waited B.listened C.wished D.cared
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Thehottestcitiesintheworld Thelocationsbelowarethehottestandalsotraveldestinationsontheplanet. Bangkok AccordingtothedataBangkokisthehottestcityontheplanet﹣notbecauseofanyparticularlyimpressivehightemperaturesbutbecauseitisconsistentlyhotalltheyearround.Thecityhasanaverageannualtemperatureof29℃coupledwithhighdampnessandanaverageof128rainydaysperyearwhilethehighesttemperatureonrecordis40℃. TimbuktuMali LocatedonthesouthernedgeoftheSaharaDeserttheAfricancityofTimbuktuissimilartoeverythingremote.It'salsooneofthehottestcitiesintheworldwithahotdryclimateofferingrecordhighsof49℃.ThroughoutAprilMayandJuneaveragemaximumtemperaturesarebeyond40℃.Modern﹣dayTimbuktuisslowlybeingswallowedbythedesertandiscertainlyashadowofthetradecenterthatitoncewas. AhvazIran BuiltonthebankoftheKarunRiverAhvazisanindustrialcitywithaveragehighsofaround46℃duringJulyitswarmestmonth.Thecity'srecordhighis54℃makingitoneoftheworld'shottestcitiesduringthesummer.FrequentsandandduststormsandanabsenceofrainfromJulytoSeptembermixwithitssky﹣hightemperatures. KuwaitCity ThewealthycapitalofKuwaitisanothercompetitorforthetitleoftheworld'shottestsummertimecitywithaveragehighsofover45℃fromJunetoAugust.Nightfallbringslittlerespite缓解withafter﹣darklowtemperaturesoftenover30℃duringthesummermonths.KuwaitCity'srecordhighis52℃whileitrainsonanaverageofjust19daysperyear. 1WhatistheBangkokfamousforinclimate? A.Thehighesttemperature. B.Thehotweatherallyearround. C.Thehighestannualtemperature. D.Thelackofrainfallallyearround. 2WhyisTimbuktunolongeratradecenter? A.ThesmallpopulationofMali. B.Thewarlastingformanyyears. C.TheinfluenceoftheSahara. D.Itslocationofthecenterofadesert. 3Whichcityholdstherecordofthehighesttemperature? A.Ahvaz. B.Bangkok. C.Timbuktu. D.KuwaitCity.
WhenshefirststartedlearningabouttheclimatechangefromoneofhereldersFawnSharpwasinvitedonahelicopterflightovertheOlympicMountainstosurveytheMountAndersonglacier冰川.Buttheglacierwasgonemeltedbythewarmingclimate.Sharphadadeepsenseoflosswhenshediscoveredtheglacierwasn'tthereanymore. Lossisagrowingissueforpeopleworkingandlivingonthefrontlinesofclimatechange.AndthatgaveJenniferWrenAtkinsonafll﹣timelecturerattheUniversityofWashingtonBothellUSanideaforaclass. ThistermshetaughtstudentsontheBothellcampusaboulthecmotionalburdensofenvironmentalstudy.SheusedtheexperiencesofNaliveAmericantribes部落scientistsandactivistsandaskedher24studentstofacetherealitythatthereisnoeasyfix﹣﹣thatthisissuchanintractableproblemthatthey'regoingtobedealingwithitfortherestoftheirlives. StudentCodyDillonusedtobeaclimatescienceskeptic怀疑论者.Thenhedidhisownreadingandresearchandchangedhismind. Dillonwasn'tgoingintoenvironmentalwork﹣﹣hewasacomputer﹣sciencemajor.Yetthepotentialforaworldwideenvironmentalcatastropheseemedsorealtohimfiveyearsagothathequithisjobandbecameafll﹣imevolunteerforanenvironmentalgroupthatworkedonrestoration恢复projects. SixmonthsintotheworkhedecidedthatAlkinson'sclasswasjustwhathewaslookingfor﹣﹣aplacewherehecoulddiscusshisconcernsaboutachangingclimate. Atkinsonsaidshehopestheclasshelpedherstudentspreparethemselvesfortheamountofenvironmentallossthatwillhappenovertheirlifetimes. Wearealreadychangingtheplanet﹣.somanyspeciesaregoingtobelostdisplacedormassivelyimpacted巨大影响的shesaid.Thefutureisn'tgoingtobewhattheyimagined. 1WhydidtheauthormentionthecaseofFawnSharp? A.TolayabasisforFawnSharp'sfurtherresearch. B.ToproveFawnSharp'sworkissimilartoAtkinson's. C.Toleadintotheissueoflosscausedbyclimatechange. D.Toshowscientists'concernabouttheMountAndersonglacier. 2What'sthemainpurposeofAtkinson'sclass? A.Toexplorehowdifferentpeopledealwithclimatechange. B.Togetstudentsmoreconcernedaboutenvironmentalissue. C.TofindsolutinstotheOlympicMountainsenvironmentalissue. D.Toteachstudentshowtoconductaresearchaboutenvironment. 3WhichofthefollowingbestexlainsintractableunderlinedinParagraphThree? A.Simple. B.Difficult. C.Common. D.Interesting. 4HowdidAtkinson'sclassinfluenceDillon? A.Dillonworkedasapart﹣timevolunteerforrestorationprojects. B.Itmadehimrealizeaplanet﹣wideclimatedisasterwouldhappen. C.Itencouragedhimtobemoreinvolvedinenvironmentalprotection. D.Itdiscouragedhimtoworkonrestorationprojectsfortheenvironment.
已知某几何体是由一个三棱柱和一个三棱锥组合而成的其三视图如图所示则该几何体的表面积为
30分 AGoodMan It'salateSaturdayafternooninearlyMarchandIamsweatinginsearchoftheonlygiftmysonwantsfromLosAngelesa1tothehomesofthestarssuchasBradPittandJetLi. AcheerfultaxidriversaysNoproblem.Mapsellersareeverywhere!Whenthetaxistopsafellow2withathinfoldedsheetandsaysTendollars. Tendollars!Withabsolute3IinformhimThat'stoomuch.Themapmanleaves.IbeginwalkingcertainI'llfindaan4starmapsoon. Iam5.There'shardlyanybodyonthestreet.Theredon'tseemtobemanyrealstoresjustcarsandbars.Nomaps.Nostars.Blockspass.Thesunbeginstosink.AttheedgeofWestHollywood6fellowwandersaheadsellingstarmapstosometeenagegirls. Tendollars7.Forgetit.Mysonwill8. ThatnightIcallmywife.Didyougetoneofthosemapstothestars?He'sbeentalkingabout9else. This10ishardtoignore.It'slate.Atall﹣nightmarketsnomaps.Iheadbacktothehotel.Morningiscoming.Therewillbeonelast11.AfterIcheckoutItakeataxi.Butatnineinthemorningmapsellersare12tobefound. YouknowsaysthedriverTheguyswiththemapsjustaren'tupyet!He'sright. Forgetit.Let'sgototheairport. WellsaysthedriverIcould13youoneifyoulike. Sure.Trustthisguy?Imightaswellthrowcashontothefreeway.ButexitingthetaxiI14mylastchance.Ihandhim﹩13andmybusinesscard.Threeweekspass.I've15onthestarmap.Mysonhasstoppedmentioningit. Thenoneafternoonstickingoutfromunderpilesofflyersthereitisabigwhiteenvelope.Thereisasmallnote.Icanhardlyreadit16Imakeoutafewphrases﹣forgive17taxi'sbeendownandfinallyhere'smapforyourson.There'snoreturnaddress.It'ssignedkindregardsM. Iholdthenoteinmyhand18whatmysonsaidtomewhenIgotbackfromLosAngeles. Didyoumeetany19Dad?heasked. NowIknowwhattotellhim. YesIdid.ImetaguynamedM. Ifyounever20anybodyyou'llneverfindthegoodguys. 1A.decoration B.map C.book D.symbol 2A.argues B.requests C.competes D.approaches 3A.assurance B.permission C.anxiety D.bargain 4A.perfect B.inexpensive C.proper D.detailed 5A.shocked B.confused C.impatient D.wrong 6A.any B.some C.another D.either 7A.still B.even C.almost D.yet 8A.believe B.regret C.understand D.admit 9A.anything B.everything C.something D.nothing 10A.idea B.news C.change D.reason 11A.try B.journey C.action D.minute 12A.everywhere B.somewhere C.anywhere D.nowhere 13A.give B.mail C.show D.spare 14A.create B.recognize C.deserve D.blow 15A.givenup B.throwndoubts C.refusedoffers D.droppedin 16A.and B.or C.but D.for 17A.fault B.delay C.carelessness D.rudeness 18A.remembering B.reminding C.reviewing D.realizing 19A.admirers B.friends C.stars D.heroes 20A.lookupto B.turnto C.havefaithin D.agreewith
25分假定你是李华想邀请热心于公益的留学生朋友Bryan一起去你市火车站参加为期两天的志愿服务活动.请给他写封邮件内容包括 1.活动时间地点 2.志愿服务内容至少三个方面. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯. DearBryan Sincerelyyours LiHua
已知||＝2||＝3的夹角为120°则|2+|＝．
15分OnOctober232018PresidentXiJinpingannouncedtheopeningoftheHongKong﹣Zhuhai﹣MacaoBridgeHZMBatanopeningceremonyinZhuhaiGuangdongprovince. TheHZMB1locateatthewatersoftheLingdingyangofPearlRiverEstuaryisahugeseacrossinglinkingHongKongandMacaototheChinesemainlandcityofZhuhai.Astheworld's2longsea﹣basedprojectthe55﹣kilometrebridgeistheresultoffiveyearsofresearchandanothernineyearsofbuilding.Ithasbeendescribedasoneoftheseven3wonderofthemodernworldbytheGuardian. Theproject4makeupofa22.9﹣kilometer﹣longmainbridgea6.7﹣kilometer﹣longtunnelandanartificialislandoffthebridge.Itisdesignedwith5servicelifeof120years.Itcanwithstandastrongwindequal6amaximumBeaufortscale16.Thebridge'sengineershadtoconsidermanyenvironmentalfactorstoprotectthe7surroundenvironmentwhilebuildingthebridge.Chinesewhitedolphinsanendangeredspeciesthatlivesinthearea8beaparticularconcern. TheHZMBwillmake9muchmoreconvenienttotravelbetweenthethreeareasitconnects.ItwillbringpeopleinHongKongMacaoandGuangdongwithinaone﹣hourlivingcircle10isexpectedtoattractmorevisitorstotheGuangdong﹣HongKong﹣MacaoGreaterBayArea.Itwillbeatransportlinkaswellasasocialeconomicculturalandtourismconnectionamongthethreeareas.
已知等差数列{an}的前n项和为Sna3+a5＝18S3+S5＝50．数列{bn}为等比数列且b1＝a13b2＝a1a4． 1求数列{an}和{bn}的通项公式 2记其前n项和Tn证明．
10分 Howtostayfocusedinclass Beingrelaxedduringclassisabadhabitanditisalsobadtoyourgrade.Focusinginclassnotonlyprovestoteachersthatyouareacapablestudentbutalsoshowsthatyouhavetheabilitytocontrolyourselfwhichwillbeveryimportant. 1Nomatterhowmuchyouwanttositwithyourfriendsduringtheclasstryyourbesttoavoidthem.Talkingwithfriendsaroundyouisnotgoingtogiveyouthefocusinclass.Thiswillgetyouintotrouble. Lookatteacherandmakeeyecontact.Yourteacherisnotjuststandinguptheretalking.2Showtheteacherthatheorshehasyourfullattentionbylookingthemintheeye.Thispersonshouldhaveyourfullattentionatalltimesduringclass. Takenotes.Bytakingnotesyou'llbeabletogetintothelesson.Writedownkeypointsasyourteacherspeaks.AndlistentothekeyphrasessuchasThisisimportantThisisthemainideaThiswillbethetestetc.3 Getinvolvedinclassdiscussions.Thisisawonderfulwaytobecomeamorefocusedsuccessfulstudent.Whenateacherasksaquestionoffertoanswerit.4Thisshowstheteacherthatyouarelisteningcarefullyduringtheclass. Askaquestion.5Thisreallyshowsyourteacherthatyouwanttobebetterandcanrecognizethethingsyouarehavingdifficultywith.Chancesarethatsomeoneelseintheclasshasthesamequestionandwastooafraidtoask!.They'llberelievedandsowillyou. A.Avoidsittingwithfriends. B.Thiscanhelpyoulistenmoreattentively. C.Ifheorsheaskforanopinionshareyourown. D.Talkingwithfriendsmakesyouloseinterestinclass. E.Heorsheistryingtogiveyouanacceptableeducation. F.Themorequicklyyouanswerthemoreattentionyoupay. G.Ifyoudon'tunderstandsomethingneverbeafraidtoask.
8分MarianBechtelsitsatWestPalmBeach'sBarLouiecounterbyherselfquietlyreadinghere﹣bookasshewaitsforhersalad.Whatisshereading?Noneofyourbusiness!LunchisBechtel'smetime.AndlikemoreAmericansshe'snotalone. Anewreportfound46percentofmealsareeatenaloneinAmerica.Morethanhalf53percenthavebreakfastaloneandnearlyhalf46percenthavelunchbythemselves.Onlyatdinnertimeareweeatingtogetheranymore74percentaccordingtostatisticsfromthereport. Iprefertogooutandbeout.Alonebuttogetheryouknow?Bechtelsaidlookingupfromherbook.BechtelwhoworksindowntownWestPalmBeachhaslunchwithcoworkerssometimesbutlikemanyofustoooftenworksthroughlunchatherdesk.Alunchtimeescapeallowshertokeepabossfromtappingherontheshoulder.Sheretunstoworkfeelingenergized.TodayIjustwantedsometimetomyselfshesaid. JusttwoseatsoverAndrewMazolenyalocalvideographerisfinishinghislunchatthebar.Helikesthathecansitandcheckhisphoneinpeaceorchatupthebarkeeperwithwhomhe'sonafirst﹣namebasisifhewantstohavealittleinteraction交流.Ireflectonhowmyday'sgoneandthinkabouttherestoftheweekhesaidIt'sachanceforself﹣reflection.Youreturntoworkrechargedandwithaplan. Thatfreedomtochooseisonereasonmorepeopleliketoeatalone.Therewasatimewhenpeoplemayhavefeltawkwardaboutaskingforatableforonebutthosedaysareover.Nowwehaveoursmartphonestokeepuscompanyatthetable.Itdoesn'tfeelasaloneasitmayhavebeforealltheadvancesintechnologysaidLaurieDemerittwhosecompanyprovidedthestatisticsforthereport. 1Whatarethestatisticsinparagraph2about? A.Foodvariety. B.Eatinghabits. C.Tablemanners. D.Restaurantservice. 2WhydoesBechtelprefertogooutforlunch? A.Tomeetwithhercoworkers. B.Tocatchupwithherwork. C.Tohavesometimeonherown. D.Tocollectdataforherreport. 3WhatdoweknowaboutMazoleny? A.Hemakesvideosforthebar. B.He'sfondofthefoodatthebar. C.Heinterviewscustomersatthebar. D.He'sfamiliarwiththebarkeeper. 4Whatisthetextmainlyabout? A.Thetrendofhavingmealsalone. B.Theimportanceofself﹣reflection. C.Thestressfromworkingovertime. D.Theadvantageofwirelesstechnology.
若x＝1是函数fx＝x3+x2+ax+1的极值点则曲线y＝fx在点0f0处的切线的斜率为
25分假定你是校排球队队长李华.请写封邮件告知你的队友Chris球队近期将参加比赛内容包括 1.比赛信息 2.赛前准备 3.表达期待. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
已知函数fx＝xlnx﹣kx2﹣xab是函数x的两个极值点a＜b． 1求k的取值范围 2证明a•b＞e2．
6分KendickLamarhasn'thadmuchluckwhenitcomesiowningaGramy.Butthat'sOKTheUSrapper说唱歌手hasjustwonaPulitzerPrizeforhismusic. In2014in2016andagainthisyear.Lamarwasnominated提名foranalbumoftheyearGrammy.EachtimehewasbeatenoutfirstbyTaylorSwiftnextbyDaftPunkandmostrecentlybyBrunoMars. ButthePulitzePrizecommitteewasispiredcnoughbyLamar's2017albumDamn.toawardthe30﹣year﹣olditsPulizerPrizeinmusiconApril16.It'sanamazingalbumthatdocumentsthereallifeofmodemAfrican﹣AmericansinSouthLosAngeleswithwildlyaccomplishedbeatsandrhythms. Lamar'swinisconsideredtobehistorical.'ThePulizershavelongdisplayedtheirpreferencetowardhighartratherthanthepopcultureofthemasses.Soit'snotjustthatnorapperhaseverwonaPulitzernopopmusicmakerhaseverwononeintheaward's75﹣yearhistory. ButLamarisnotjustasinger一he'scleveratusinglanguage.Likethebestwritershismusicdescribessmallmomentsthatilustrate阐明largerpoints.HissongsareabouthisexperienceasablackmanwhogrewupinCalifomiastruggledgotintotroubleandfoundhiswayoutbyworkinghardandmakingsenseofthehistoryandrealityofracialproblemsintheUS. He'sanartistwhochallengesideasaidRyanCooglerdirectoreoftheblockbuste大片hitBlackPantherforwhichLamarcreatedmusic.Onebigthemeinourfimisthisideaof'WhatdoesitmeantobeAfrican?'Kendrickinhismusicisveryexactlyanddirectlychallengingthatquestion. Goodartistsentertainusgreataristsmakeusthinkandexceptionalaristshelpusempahize感同身受.Therearealotofgoodgreatevenexceptionalartistsinrockpopcountryandhip﹣hop.ButonlyLamarhasaPulizterPrize. 1WhatisLamarsalbumDamnabout? A.African﹣Americans'historyandculture. B.HardshipsoftheAfrican﹣Americanartists. C.ThewaystheUSgovemmentdealwithracialproblems. D.ThelivesofmodemblackpeopleinSouthLosAngeles. 2WhyisLamar'sPulitzerPrizewinsignificant? A.Heisthefirstfilm﹣makertowintheprize. B.Itisconsideredamilestoneforpopmusic. C.Heisthefirstblackpersontowintheprize. D.HehasmissedGrammyseveraltimesbefore. 3WhatcanwelearnfromRyanCoogler'swords? A.Lamardrewinspirationfromhisownexperience. B.Lamarhasthecouragetotakeonbigcallengesinlife. C.BlackPantheriswellknownbecauseofLamar'smusic. D.Lamar'smusicmathesthethemeofBlackPantherwell.
Iamtravelinghome.Itisbitterlycoldandsnowybutthewarmtrainisrightontime.IfeelpleasantlysatisfiedasIlookoutattherushhourtrafficonthemotorway.Ifeelmoresatisfiedasthesmelloffreshcoffeeannouncesthearrivalofthedrinksservice.SwissfriendsoftentellmeproudlythattheirrailserviceisthebestintheworldbutrecentlyoneexperiencehasprovedthatthegreatSwissloveaffairwiththeirrailwayhasturnedalittlesour. Itallbeganwiththedecisiontoendticketsalesontrains.OnecoldmorningIarrivedatmylocalstationonlytofindthattheticketmachinewasbroken.NomatterIthoughtIhavegotasmartphoneandIhurriedlysetaboutbuyingmyticketthatway.ThiswasnotaseasyasIhadexpectedbusyingmyselfbetweencreditcardandphonewithfreezingcoldfingersbutbythetimeIgotonthetraintoGenevaIhadane﹣ticketandIproudlyshowedittotheconductor.Unfortunatelyshetoldmethatmyticketwasnotvalid有效的.SeveralweekslateraletterarrivedfromSwissrailwaystogetherwithafinefor190francs﹩210. Thegoodpeopletheretellmetheformalpaymentformyticketfrommycreditcardcompanyarrivedfourminutesaftermytrainleftthestation.ThatmeanstheysaythatIboughtmyticketonthetrain﹣andthatisstrictlyprohibited. Swissrailwayssaytheirpolicyisdesignedtoprotecthonestticket﹣payingpassengersbutaquicklookattheirbalancesheetsuggestssomethingelse.Thecompanyismakingabout﹩2millionamonthfromfines. Althoughtraintravelisstillpopularthoseseatsdonotfeelascomfortablethecoffeedoesnotsmellquitesogood﹣becauseSwissrailwayshavelostfornowanywaysomethingfarmorepreciousthan﹩2millionamonthgoodrelationswiththeircustomers. 1Whatcanwelearnfromparagraph1? A.TheSwisstrainsusuallycomelate. B.Trafficonthemotorwaygoessmoothly. C.TheauthorhatestravelingontheSwisstrain. D.TheauthorisgenerallypleasedwiththeSwissrailservice. 2Whydidtheconductorsaythattheauthor'se﹣ticketwasinvalid? A.Itwaspurchasedonline. B.Itwaspaidforafterthetrain'sdeparture. C.Itwaspurchasedonaticketmachine. D.Itwaspaidonasmartphone. 3Whatdoestheauthorwanttoshowbytellingtheexperience? A.Thefinewasunfair. B.Theconductorwasimpolite. C.E﹣ticketsaregettingpopular. D.Creditcardscanbeinconvenient. 4WhatdoestheauthorthinkofthenewpolicyofSwissrailways? A.Itattractsmorepeopletotravelbytrain. B.Itmakesthecompanylosealotofmoney. C.Itdamagescompany﹣customerrelations. D.Itprotectshonestticket﹣payingpassengers.
Your2018ReadingListProvidedbyBillGates Mostofuscan'tlivelikebillionaireMicrosoftco﹣founderBillGatesbutwecanreadlikehim.Gatesrecommendedfourbooksin2018﹣thoughsomewerepublishedearlier. LeonardodaVincibyWalterIsaacson2017 ThebestsellingbiographerofSteveJobsandAlbertEinsteinresearcheddeeplyintodaVinci'scontributionsbeyondarthighlightingthebreadthofhisscientifictechnologicalandcreativeoutput.Leonardonearlyunderstoodalmostallofwhatwasknownontheplanetatthetime.That'smostlybecauseofhiscuriosityabouteveryareaofnaturalscienceandthehumanexperiencesaidGates. TheBestWeCouldDoAnIllustratedMemoirbyThiBui2017 Gatescallsthisgraphicnovelreallyimpressive.BuiisthedaughterofVietnameserefugeeswhocametoAmericaafterthefallofSaigonandbecomingaparentinspiredhertolookintoherownparents'miserablehistory.IwasstruckbyhowtheexperiencesBuiillustratesmanagetobebothuniversalandspecifictotheircircumstancessaidGates. LincolnintheBardobyGeorgeSaunders2018 Saundersalong﹣timeshortstorywriterwonhighpraiseforthisnovel.Thebookimaginestheghoststhathaunt萦绕thebasementofWillieLincolnAbrahamLincoln'ssonwhodiedat11inreallife.Willie'sdeathaftertheCivilWarmadethepresidenthaveanewunderstandingofthegriefhe'screatinginotherfamiliesbysendingtheirsonsofftodieinbattlesaidGates. OriginStoryABigHistoryofEverythingbyDavidChristian2018 ThisnewbookisbythecreatorofBigHistoryafreeonlinesocialstudiescourse.IttraceshistoryinwidesweepingmovementsstartingwiththeBigBanganditprovidesineffectashortcourseinmodernscience.Thisisabriefhistoryoftheuniverse.DavidgetsalittlestuckonthecurrenteconomicandpoliticalproblemsintheWestandIwishhetalkedmoreabouttheroleinnovationwillplayinpreventingtheworsteffectsofclimatechangesaidGates. 1Whichbooksrefertothefieldofscience? A.OriginStoryandLeonardodaVinci B.LincolnintheBardoandOriginStory C.LeonardodaVinciandTheBestWeCouldDo D.TheBestWeCouldDoandLincolnintheBardo 2Ifyouareinterestedinthrillerswhosebookwillyoumostprobablychoose? A.WalterIsaacson B.ThiBui C.GeorgeSaunders D.DavidChristian 3WhichofthefollowingstatementsisTRUE? A.TheBestWeCouldDoisanautobiography. B.LincolnintheBardohasbeenwarmlyreceived. C.DavidChristiantalksmuchaboutthepartthatinnovationwillplay. D.ReaderscanonlyreadaboutLeonardodaVinci'scontributionstowardsart.
10分Ifonethingonyourwish﹣listisastress﹣freeholidaythenherearesomeshoppingtipspreparedforyouwhichwillsavebothyourtimeandmoney. Don'tbetoughonyourbrains.1Don'tbeafraidtolookforcluesandaskforideas.Firstseewhetherthefolksonyourto﹣buy﹣forlisthavealreadydroppedsomevaluablehintsoftheirdreameditems.Ifyoustrikeoutencourageyourluckyrecipientstopostitemstheywishsomeonewouldbuyforthem.Youcanalsofindinspirationinthemanyonlinegiftguides.2﹣GiftsforDadsGiftsforGolfersandsuch.Thenyou'llgettheidea. 3Youreallycanenlistyourownpersonalhelpers.Don'tfeelguiltyaboutthat﹣afterallSantaemployshelperstoo.Manystoreshavefreeprofessionalshopperswhocanpickoutpresentsforyou.We'renottalkingjusthigh﹣endstoressuchasBlooming﹣dale'sandNordstrom.4They'reallhungrytowinyourbusinessawayfromonlineretailers.Butyou'lllikelyneedanappointmentsocallaheadorsearchstores'websitesforpersonalshopping.You'lltypicallyfindalinkonthehomepageunderContactUsorServices. Havegiftsdelivered.Timeismoneyandfornotalotofmoneyyoucansavealotoftimebyhavingyourgiftsdeliveredrighttoyourdoor.Somemom﹣and﹣popshopsofferdeliveryservicewhilechainstorestendtochargeforthatbutitstillmightbeworthpayingfortheconvenience.5Firstgotopostmates.comordownloadthefreeappandseewhetherit'savailableinyourarea.Thentypethenameofastoreintothesearchbarclickonthestoreandentertheitemyouwant. A.Makeanappointmentahead. B.Can'tfigureoutwhattobuy? C.Doyouwishforastress﹣freeholiday? D.Getsomeoneelsetodoshoppingforyou. E.Theyaretypicallyorganizedbyrecipientinterestand/orpricerange. F.OtherslikeMacy'sandJ.Crewwillalsoletyouleavetheshoppingtothem. G.Forlocalstoresthatdon'tofferthisconveniencetrythePost﹣matesdeliveryservice.
已知复数z＝为纯虚数则实数a＝
Usingamobilephoneformorethan10yearsincreasestheriskofgettingbraincanceraccordingtothemostcomprehensivestudyoftherisksyetpublished. Thestudy﹣whichisdifferentfromofficialstatementsthatthereisnodangerofgettingthedisease﹣foundthatpeoplewhohavehadthephonesforadecadeormorearetwiceaslikelytogetamalignanttumour恶性肿瘤onthesideofthebrainwheretheyholdthehandset. Thescientistswhoconductedtheresearchsayusingamobileforjustanhoureveryworkingdayduringthatperiodisenoughtoincreasetherisk﹣andthattheinternationalstandardusedtoprotectusersfromtheradiationisnotsafeandneedstoberevised. Theyconcludedthatcaution警告isneededintheuseofmobilephonesandbelievechildrenshouldbediscouragedfromusingthematall. Britain'slargestinvestigationintothehealthrisksofthetechnologytheMobileTelecommunicationsandHealthResearchMTHRprogramme﹣foundedbygovernmentandindustrysources﹣reportedthatmobilephoneshavenotbeenfoundtobeassociatedwithanybiologicalorharmfulhealtheffects. ButitschairmanProfessorLawrieChallisadmittedthatonlyasmallpercentageoftheresearchhadcoveredpeoplewhohadusedthephonesformorethanadecade.HewarnedWecannotruleoutthepossibilityatthisstagethatcancercouldappearinafewyears'time. Thenewstudy﹣headedbytwoSwedesProfessorLennartHardelloftheUniversityHospitalinOrebroandProfessorKjellHanssonMildofUmeaUniversitywhoalsoservesontheMTHRprogramme'smanagementcommittee﹣goessomewaytomeetingthedeficiency缺陷. Thescientistspulledtogethertheresultsofthe11studiesthathavesofarinvestigatedtheoccurrenceoftumoursinpeoplewhohaveusedphonesformorethanadecadeusingresearchinSwedenDenmarkFinlandJapanGermanytheUnitedStatesandBritain.Theyfoundalmostallhaddiscoveredanincreasedriskespeciallyonthesideoftheheadwherepeoplelistenedtotheirhandsets. Fiveofthesixstudiesofmalignanttumourfoundanincreasedriskandonlyonedidnotstillfoundanincreaseinbenign良性的tumour.Fourofthefivestudiesthatlookedatacousticneuromas听神经肿瘤foundthem.Theexceptionwasbasedononlytwocasesofthediseasebutstillfoundthatlongtermusershadlargertumoursthanotherpeople. Thescientistsputthefindingsofallthestudiestogethertoanalysethem.Thisshowedthatpeoplewhohaveusedtheirphonesforadecadeormoreare20percentmorelikelytocontractacousticneuromasand30percentmorelikelytogetmalignantgliomas胶质瘤. Theriskisevengreateronthesideoftheheadthehandsetisusedlongtermusersweretwiceaslikelytogetthegliomasandtwoandahalftimesmorelikelytogettheacousticneuromastherethanotherpeople. ThescientistsconcludeResultsfrompresentstudiesonuseofmobilephonesformorethan10yearsgiveaconsistentpatternofanincreasedriskforacousticneuromaandglioma.Theyaddthatanincreasedriskforothertypesofbraintumourscannotberuledout. 1ThenewstudyheadedbythetwoSwedes. A.correctedtheabsenceintheMTHRprogramme'smanagement B.cametoaconclusionsimilartothatofMTHR'sinvestigation C.ruledoutthepossibilitythatlongtimeuserscouldgetbraincancer D.madesomeimprovementsbyexpandingtheinvestigationsamples 2Thepassagetriestotellusthat. A.usingmobilephonesisdangeroustopeople'shealth B.childrenshouldbeforbiddentousemobilephones C.peopleusingmobilephonesanhoureveryworkingdaywillgetbraincancer D.themorepeopleusemobilephonesthemorelikelytheyaretogetbraincancer 3TheunderlinedwordcontractinParagraph10probablymeans. A.beinfectedwith B.beassociatedwith C.befacedwith D.becoveredwith 4Thebesttitleofthepassageis. A.TheCausesofBrainCancer B.TheHiddenDangerofMobilePhones C.TheResearchofBrainCancer D.TheEffectsofMobilePhones
若函数fx＝m+sinx﹣cosx的最大值为0则m＝
15分A90﹣year﹣oldhasbeenawardedWomanOfTheYearfor1beBritain'soldestfull﹣timeemployee﹣stillworking40hoursaweek.NowIreneAstburyworksfrom9amto5pmdailyatthepetshopinMacclesfield2sheopenedwithherlatehusbandLes.Heryearsofhardworkhave3finalbeenacknowledgedafteracustomernominated提名hertobeCheshire'sWomanOfTheYear. PickingupherLifetimeAchievementawardproudIrene4declareshehadnoplans5retirefromher36﹣year﹣oldbusiness.IrenesaidIdon'tseeanyreasontogiveupwork.IlovecominghereandseeingmyfamilyandallthefriendsI6makeovertheyears.IworknotbecauseIhaveto7becauseIwantto. GranddaughterGayleParks31﹣whoworksalongsideherinthefamilybusiness﹣saiditremainedunknownastowhonominatedIrenefortheaward.ShesaidWedon'thaveanyideawhoputgrandmaforward.Whenwegotacall8sayshewasshort﹣listedwethoughtitwas9joke.Butthenwegotanofficialletterandwewereblownaway.Wearesoproudofher.It's10wonder.
设椭圆＝10＞b＞0的右顶点为A上顶点为B．已知椭圆的焦距为2直线AB的斜率为﹣．1求椭圆的标准方程2设直线ly＝kxk＜0与椭圆交于MN两点且点M在第二象限l与AB延长线交于点P若△BNP的面积是△BMN面积的3倍求k的值．
8分Oneofthemostimportantthingsintheworldisfriendship.Inordertohavefriendsyouhavetobeafriend.Buthowcanyoubeagoodfriendatschool? Listen﹣Listenwhentheyaretalking.Don'tsayanythingunlesstheyaskyouaquestion.Sometimesit'snotnecessaryforyoutohaveanythingtosaytheyjustneedsomeonetotalktoabouttheirfeelings. Helpthem﹣Ifyourfriendiseverinneedofsomethingbetheretohelpthem.Youshouldtrytoputthemfirstbutmakesureyoudon'tdoeverythingtheywantyoutodo.Trytotakeanextrapencilorpenwithyoutoclassesincasetheyforgetone.Havealittleextramoneyinyourpocketincasetheyforgetsomethingtheyneed. Bethereforthem﹣Bethereforyourfriendstohelpmakethemfeelbetterinhardtimes.MarilynMonroeafamousU.S.actoroncesaidIoftenmakemistakes.SometimesIamoutofcontrolbutifyoucan'tstaywithmeatmyworstyouaresurenottodeservetobewithmeatmybest.Alwaysrememberthis!Ifyoudon'twanttostaywithyourfriendswhenthey'reinhardtimesthenyoudon'tdeservetobewiththemwhenthey'rehavingagoodtime! Makeplans﹣Trytomakeplanswithyourfriends.Goshoppinggoforicecreamhaveapartygotoamovieandsoon.Taketimetoknoweachotherevenbetterbydoingsomethingyoubothenjoy.Byplanningthingstogetheryoubothcanhaveagoodtime.Andyou'llrememberthesethingswhenyou'reallold! 1Whileyourfriendistalkingtoyouabouthisorherfeelingsyoushould. A.givehimorhersomeadvice B.calmhimorherdown C.justlistenunlessasked D.shareyourfeelingsaswell 2Whenweprovidehelpforourfriendsweshould. A.putthembeforeourselves B.trytodoeverythingforthem C.changetheirbadhabitsfirst D.ignoretheirfaults 3WhatcanwelearnfromMarilynMonroe'swords? A.Lifewithoutafriendisdeath. B.Afriendiseasierlostthanfound. C.Amanisknownbyhisfriends. D.Afriendinneedisafriendindeed. 4Whatisprobablythebesttitleforthetest? A.Howtofindagoodfriend. B.Howtobeagoodfriend. C.Howtohelpfriendsintrouble. D.Howtomakemorefriends.
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