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如图，客轮沿折线A─B─C从A出发经B再到C匀速航行，货轮从AC的中点D出发沿某一方向匀速直线航行，将一批物品送达客轮，两船同时起航，并同时到达折线A─B─C上的某点E处，已知AB＝BC＝200海里...
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一艘货轮12月初从香港出发驶往鹿特丹港选择最近的路线航行货轮经过海峡的先后顺序为
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④③②①
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如图轮船甲从港口O.出发沿北偏西25°的方向航行8海里同时轮船乙从港口O.出发沿南偏西65°的方向航
两艘轮船从相距365千米的两港相对而行客轮每小时行48千米货船每小时行45千米客轮先行86千米后货轮
如图客轮沿折线A.－B.－C.从A.出发经B.再到C.匀速航行货轮从AC的中点D.出发沿某一方向匀速
甲乙两艘旅游客轮同时从台湾省某港出发来厦门．甲沿直航线航行180海里到达厦门乙沿原来航线绕道香港后
如图所示在某港口O.要将一件重要物品用小艇送到一艘正在航行的轮船上在小艇出发时轮船位于港口O.北偏西
一个半径为20海里的暗礁群中央P.处建有一个灯塔一艘货轮由东向西航行第一次在A.处观测此灯塔在北偏西
1988年SOLAS公约修正案规定一切从事国际航行的客轮和总吨以上的货轮都必须在1999年2月1日前
200
300
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沿大圆航线航行实际上是船舶_____________
选定的大圆弧航行
出发点与到达点之间的恒向线航行
将大圆弧分成若干小段，每一段仍然是沿恒向线航线航行
出发点与到达点之间的恒位线航行"
如图客轮以速度2v由A至B再到C匀速直线航行货轮从AC的中点D出发以速度v沿直线匀速航行将货物送达客
如图客轮沿折线A－B－C从A出发经B再到C匀速航行货轮从AC的中点D出发沿某一方向匀速直线航行将一批
如图客轮沿折线A─B─C从A出发经B再到C匀速航行货轮从AC的中点D出发沿某一方向匀速直线航行将一
如图一艘客轮以30km/h的速度由A.码头出发沿北偏东53°方向航行至B.码头已知A.B.两码头所在
如图客轮沿折线A─B─C从A出发经B再到C匀速航行货轮从AC的中点D出发沿某一方向匀速直线航行将一
一货轮从A港出发先沿北偏东75°的方向航行40海里到达B港再沿南偏东15°方向航行30海里到达C港
如图客轮沿折线A.─B.─C.从A.出发经B.再到C.匀速航行货轮从AC的中点D.出发沿某一方向匀
甲货轮在镇江江面与乙客轮相撞乙客轮受损后最先抵达南京甲货轮则被镇江有关部门扣留现已查明甲货轮是上海某
镇江
南京
上海
南通
如图.货轮O.在航行过程中发现灯塔A.在它南偏东60°的方向上同时在它北偏东40°南偏西10°西北即
如图某客轮以每小时10海里的速度向正东方向航行到A处时向位于南偏西30°方向且相距12海里的B处发
如图所示一艘船从A点出发沿东北方向航行至B再从B点出发沿南偏东15°方向航行至C点则∠ABC等于多少
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设函数fx=． 1求f-1f0f2的值 2求不等式fx≤2的解集．
Herattractivelipsseemedtospeakwordsofkindnesswhilehereyesappearedtoseek寻找outthegoodinpeople.Youhavetwohandsoneforhelpingyourselftheotherforhelpingothers.Sheusedtosay. ItwasforthisrarecharmandinnerbeautythatBritishmoviestarAudreyHepburn1929﹣1993wasnamedthemostnaturallybeautifulwomanofalltimeinJune2004. Herskinlooksfreshinallherfilmsandherwarmandlivelypersonalityreallyshinesthroughsaidonebeautyexpert. LifewasnevereasyforHepburn.Shortlyafterherparents'painfuldivorcewhenshewasnineshefoundherselfintheNetherlandsatthestartofWorldWarII.Hepburnwatchedhelplesslyasseveralofherrelativeswerekilled.Shesurvivedbyeatingtulipbulbsandcarriedsecretmessagesfortheresistanceinherballetshoes. Shedreamedofbecomingaballetdancerbutwastoldshewastootallandnottalentedenoughtobeasuccess. Hepburnthenturnedtomusicalsandspentmostofhertimeasachorusgirl舞女.ShehadsomesmallmovierolesbutitwasnotuntilRomanHoliday1953thatshebecameastar.WithhergoodmannersanddelicatefigureshewasperfectintheroleofaEuropeanprincess.ShetooktheBestActressOscarforherperformance. In1988Hepburnbeganhermostimportantrole﹣asaGoodwillAmbassador大使forUNICEFUnitedNationsChildren'sFund.Shetraveledtothepoorestplacesdoingherbesttoprovidecareandcreateawarenessofthedifficultsituationsinwhichsomechildrenlive. WhenHepburnpassedawayamessagedisplayedatherfuneralreadInlosingAudreytheworldnotonlylostamoviestarwelostaprincessanangelapersonwhoinspiredusallandwhoseselflessandlovingexamplesshallalwaysberemembered. 1WhenHepburnbegantoactasaGoodwillAmbassadorforUNICEFhowmanyyearshadpassedsinceherparents'divorce? A.50 B.52 C.38 D.46 2Whatisthepurposeofthelastparagraph? A.TotellreadersaboutAudreyHepburn'sdeath. B.TothinkhighlyofAudreyHepburn'swholelife. C.TotellreadersthemessagedisplayedatAudreyHepburn'sfuneral. D.TosaygoodbyetoAudreyHepburn. 3WhichofthefollowingbestdescribesAudreyHepburn'slife? A.Difficultandlucky. B.Miserableandsmooth. C.Hardandsuccessful. D.Easyandsmooth. 4Whatwouldbethebesttitleforthepassage? A.BeautyIsNotJustSkinDeep. B.BeautyIsJustSkinDeep. C.BeautyNeverStaysForever. D.AWorld﹣famousBeautyexpert
已知函数y=x-|lnx|的两个零点为x1x2且x1＞x2则
Almostnoneofushavethetimetoreadeverythingwe'dliketoread.Yetwelosecountlesshourstodailyactivitiesthatbringuslittlejoyliketakingbusesandwaitinginline.Whatifwecouldturntheselittleblocksofunoccupiedtimeintopreciousandrewardingmomentsforlearningandreflection? Foundedin2012iReaderamicro﹣learningapponmobilephonesbringsthebiggestideasfrombest﹣sellingbooksthrough15﹣minuteaudio音频andtext.Sofarmorethan3000bookshavebeenincludedrangingfrompsychologyandparentingtomanagementandeconomicswithnewtitlesaddedeveryday. iReaderispioneeringanewmethodofreadingwithover9millionusersenjoyingthebenefitsalready.AccordingtothePewResearchCenterPRCtheBritishreadjust4paperbooksayearandover25%haven'treadasinglepaperbookthisyearbutreadingisn'tdying.TherearenowmorewaysfortheBritishtoreadthaneverbeforeduetothewidespreaduseofe﹣booksandaudiobooks. ThebooksiniReaderarerewrittentoensureitiseasytorememberthemaincontent.Thewaythecontentiseditedhasbeenspecificallydesignedtoensureitisusefulinpractice.Besidesthecontentisrewrittenwithrelevantexamplesinreallifewhichmeansusersaremorelikelytorememberandapplywhatishelpfultothem. HolgerSeimGermanco﹣founderofthisappdeclaresiReadergivesyouthebiggestideasintheshortestpossibletime.Ittransformsgreatideasintolittlepacksyoucanlistentoorreadinjust15minutes. 1Whatdoestheauthorsuggestpeopledointheunoccupiedtime? A.Readandthink. B.Writeandshare. C.Avoidtakingbuses. D.Bringjoytodailyroutines. 2WhatcanweinferfromthePRCfindings? A.TheBritishbenefitalotfromreading. B.Readingmethodsaremoreimportantthanbefore. C.Digitaltechnologyaretakingtheplaceofpaperbooks. D.NewformsofbooksarechangingthewaytheBritishread. 3HowdoesiReadermakethecontenteasytoremember? A.Bybringingfuntoit. B.Bymakingituseful. C.Byusingartisticdesigns. D.Bytakingusersasexamples. 4Whatisthebesttitleforthetext? A.iReaderPreventsReadingfromDying B.iReaderUnitesWorldwideBook﹣lovers C.iReaderTheBestNewAppCreation D.iReaderBigIdeasinSmallPackages
在平面直角坐标系中直线l的参数方程为其中t为参数．现以坐标原点为极点x轴的非负半轴为极轴建立极坐标系曲线C的极坐标方程为ρ=6cosθ． 1写出直线l的普通方程和曲线C的直角坐标方程 2若点P坐标为-10直线l交曲线C于AB两点求|PA|+|PB|的值．
Somepeoplesaythetraditionalcalendarof180daysnolongermeetstheneedsofAmericansociety.Theypointoutthatstudentsinmostotherindustrialcountriesareinschoolmorehoursadayandmoredaysayear.Criticsalsosayalongsummervacationcausesstudentstoforgetmuchofwhattheylearned.Schoolsareunderpressuretoraisetestscores.Somehavechangedtheircalendarstotrytoimprovestudentperformance.Theyhavelengthenedtheschooldayoraddeddaystotheyearorboth.Thiscanbecostlyifschoolsneedairconditioningonhotdaysandschoolemployeesneedtobepaidfortheextratime. Someschoolshaveayear﹣roundschedule.Theschoolyearisextendedovertwelvemonths.Insteadofalongvacationtherearemanyshortones.Localbusinessesmayobjecttoalongerschoolyearbecausestudentsareunabletoworkaslongatsummerjobs.Somepartsofthecountryhadyear﹣roundprogramsinthenineteenthcenturymostlyforeconomicreasons.Theyfeltitwastedmoneytouseschoolbuildingsforonlypartoftheyear.Year﹣roundprogramscanalsoreducecrowdinginschools.Inoneversionstudentsattendschoolfornineweeksandthenhavethreeweeksoff.Thestudentsareingroupsthatarenotallinschoolatthesametime. Anotheryear﹣roundcalendarhasallstudentsinschooltogetherfornineweeksandoffforthree.Thisismeanttoprovidethecontinuouslearningthatcanbelostoveralongbreak.Butyear﹣roundschoolinghasopponents.Theysayitcancauseproblemsforfamilieswhentheywanttomakesummerplans.Andtheysayitinterfereswithactivitiesoutsideschool﹣﹣includingsummeremployment. Someexpertssaynoreallygoodstudieshavebeendonetomeasuretheeffectofschoolcalendarsonperformance.Butsomeeducatorsthinkyear﹣roundschoolingespeciallyhelpsstudentsfrompoorfamiliesthatlackeducationalsupportathome. 1Thebesttitleforthepassageseemstobe. A.DebatinguponYear﹣roundSchooling B.AdvantagesofYear﹣roundEducation C.DisadvantagesofaLongSummerVacation D.DifferentTypesofSchoolCalendars 2WhichofthefollowingisNOToneofthereasonsthatschoolsshouldextendschooldays? A.Thetraditionalcalendarisoutofdate. B.Longholidayscausestudentstoforgetmuchofwhattheylearned. C.Schoolsfacepressuretoraisetestmarks. D.Schoolsinothercountriesurgethemtodoso. 3Thoseagainstyear﹣roundschoolingarguethat. A.itdoeslittletohelpimprovestudents'performanceatschool. B.itmaycauselearningtiredness. C.itwillnothavemucheducationalvalue. D.itaffectsstudents'activitiesoutsideschool. 4Welearnfromthepassagethatyear﹣roundschooling. A.willenablestudentstoraisetheirscores. B.isexpectedtogetunderwaysoon. C.remainsacontroversialissue. D.isapprovedbythegovernment.
计算log43+1og83log32+log92=
许多人如此沉溺于网络购物以至于每天都要访问购物网站.So…
AlibabaGroupHoldingLtdsaidonThursdaythatitwillcreateanotheronlineshoppingeventinthenexttwomonthstotapfurtherintoruralconsumption. Thee﹣commercegiantwhichgeneratedagrossmerchandisevolumeof91.2billionyuan﹩14.3billioninthe24﹣hoursaleseventonWednesdaysaiditwillholdasimilarfestivalto1withtheupcomingSpringFestivalinFebruary. ZhangYongchiefexecutiveofficerofAlibabasaidlikeurbanresidentsmanyruralconsumershavealsobecomeonlineshopping2.Thesoon﹣to﹣be﹣launchedshoppingeventwillbetterserveruralconsumersandbringmore3productstothediningtablesofurbanconsumershesaid. TheHangzhou﹣basedfirmsaidtheSpringFestivaleventwillbelaunchedbyitscustomer﹣to﹣customersiteTaobaoanditsRuralTaobaobusinessunitwhichis4toonlineshoppersinruralareas. SunLijunvice﹣presidentofAlibabawhoisinchargeofRuralTaobaosaidtheSpringFestivalshoppinggalawillhelp5thegapbetweenurbanandruralconsumers. WewantvillagerstocelebrateLunarChineseNewYearwithseafoodfromNewZealandandwinefromFrance.Thatsaidwealsowanturbanresidentstoenjoyhigh﹣qualityfreshproduce6directlytotheirdoorstepshesaid. Alibabahasmadeglobalizationandgoing﹣ruralitstop7forfurtherdevelopment.Lastyearitsaiditwillinvest10billionyuanoverthenextthreetofiveyearstoprovidee﹣commerceservicesinabout100000villages. Ruralshoppersprovedtheirbuyingpowerby8morethan10millionyuaninthefirsteightminutesoftheNov11onlineshoppingfestival.Peoplein8000villagesparticipatedinthe24﹣hour9onWednesday.ThemostexpensiveorderofthedaywasanorderforaPorscheatabout500000yuan. Alibabadidn'tdisclosethespecific10madebyruralshoppersbutsaidthatitemssuchasTVsetsairconditionersshampoosandoilwereverypopularinvillages.
Don'thaveplentyoftimeforreading?Ifyouareinterestedinnon﹣fictionbooksherearegoodchoicesforyou. ARoomofOne'sOwn ThisessaybyEnglishwriterVirginiaWoolfisbasedonseverallecturesgiventotwowomen'scollegesatCambridgeUniversityin1928.InitWoolfdescribesthatit'scircumstancenottalentalonethatallowsmentobemoresuccessfulatwriting.Womeninotherwordsspendsomuchtimecookingcleaningandtendingtotheirchildrenthattheyhavenotimeleftforart.Towritewellthereforeawomanmusthavearoomofherown.Whileonitssurfacethisessayappearstobeonlyaboutwritingitisactuallyaboutwealthandclassfreedomandimprisonmentandthepowerstrugglebetweensexes. TheArtofWar WrittenbyancientChinesewarrior武士SunZiTheArtofWariswidelyconsideredtobeoneofthebestbooksaboutmilitarystrategyinhumanhistory.Consistingof13chapterseachdealingwithaseparateaspectabouthowtofightawarthebookhasbeentranslatedintoeverymajorlanguageandhasthousandsofeditions.Forcenturiesithasbeenusedtotrainworldleadersforitsdetailedstudyofmilitarystrategy军事策略andeffectiveleadership. LettertoMyDaughter ThisbookofessaysandpoemsbyMayaarespectableAmericanpoetiswrittenforthedaughtersheneverhad﹣themillionsofwomenbothyoungandoldthatsheconsiderstobeherfamily.Fromtheviewpointofacaringolderrelativethisbookcontainslessonsselectedfromherownlifeexperiencesincludingthebirthofheronlychildasonaswellasthedevelopmentandlossoffriendship. ABriefHistoryofTime Ifyou'reshortontimethenwhynotreadaboutwellthecreationoftime?This1998editionfrombrilliantscientistandmathematicianStephenHawkingexploresmind﹣bendingquestionsaboutthecreationoftheuniverseincludingifandwhenitwillendandifsohow.DespiteitsheavysubjectmatterHawkingaddressesthesequestionsinawaythat'seasytounderstandevenforthosewhoknowlittleaboutphysics. 1Whatcanwelearnaboutthefourbooks? A.ABriefHistoryofTimemainlyfocusesonthematteroftime. B.LettertoMyDaughterisactuallyacommonfamilyletter. C.TheArtofWargivesadviceonhowtobeworldleaders. D.ARoomofOne'sOwnismorethanaboutwriting. 2Whatcanbeinferredfromthepassage? A.AsaphysicistHawkingisequallyfamousinwriting. B.Mayadevotesherselftofightingforwomen'srights. C.ThebookbySunZiishelpfulinpolicy﹣making. D.Woolflooksdownuponmeninwriting. 3Whatisthepurposeofthepassage? A.Tomakecomparisonsbetweenthefourbooks. B.Torecommendthefourbookstoreaders. C.Tomakecommentsonthefourbooks. D.Topromotesalesofthefourbooks.
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定义一种集合运算A⊗B={x|x∈A∪B且x∉A∩B}设M={x||x|＜2}N={x|x2-4x+3＜0}则M⊗N=
Haveyoueverheardthestoryofthefour﹣minutemile?ForyearspeoplebelievedthatitisimpossibleforahumanbeingtorunamileinlessthanfourminutesuntilRogerBanisterproveditwrongin1954.Withinoneyear37runnersbrokethebeliefbarrier.Andtheyearafterthat300otherrunnersdidthesamething. Whathappensifyouputananimalinapond?Anyanimalbigorsmallwillswimitswaythrough.Whathappens1someonewhodoesnotknowhowtoswimfallsindeepwaters?Youdrown.Ifananimalwhohasnotlearnedswimmingcouldescapebyswimmingwhynotyou?Becauseyoubelieveyouwilldrown2theanimaldoesnot. Thesecasesshowthepowerofbeliefs.Thereisnoother3powerfulforceindirectinghumanbehaviorthanbelief.Ourbeliefshavethepowertocreateandtodestroy. Inawayitisourbeliefs4determinehowmuchwe'llbeabletorealizeourpotential.Sopayattentiontosomeofyourbeliefs.Doyoubelieveyouareweakinmathematics?Doyoubelievethatotherpeopledislikeyou?Doyoubelievelifeisfullofproblems? Beliefisnotmysterioushoweverit'snothingbutthegeneralizationofapastincident.Asakidifadogbityouyoubelievedalldogstobedangerous.5changecertainbehavioridentifythebeliefs6associatewithit.Changethosebeliefsandanewpattern7create.
你真周到帮我预先订好了票子.It
Howtoavoidaboringconversation Whatexcusesshouldyouusetoavoidtalkingtopeopleyoudon'twanttotalkto?Herearetipsandnon﹣offensivewaystogetoutofunwantedconversations. Goforarefill.Itisnaturalforanyoneatapartytobeexcusedtogetarefill续杯.1Andonceyouexcuseyourselfmakeamovefastbeforethepersonrequestsyoutogetarefillforhimaswell. Pretendbadmood.CutofftheconversationbeforeitstartsbysayingsomethingalongthelinesofI'mnotinagoodmood.CanItalktoyoulaterifyoudon'tmind?2Sayitfirmlysothatpeoplegetthemessageloudandclear. Askyourfriendtosaveyou. 3Simplytextyourfriendandaskhimorhertocomeforapparentlysomethingimportant.Youwillbeabletoskipaboringchatwithaseeminglyreasonableexcuse. 4Youareadvisedtolookawayfromthatpersonanddon'tmakeeyecontactsothatyoucangivepowerfulhints暗示thatyoufindtheconversationextremelyboring.5Besuretotuneintotheconversationeverynowandthensoyoudon'tcomeacrossasrude. A.Behaveinanobviouslycarelessway. B.Justbesurethatthepersonyouaretalkingtodoesnotoffertoaccompanyyoutodoso. C.Don'tacttoopoliteinanattempttodrawsympathy. D.Usebodylanguagetoindicateboredom. E.Yourfriendisboundtoperformbrilliantlyincopingwiththedullone. F.Lookelsewhereandpretendthatsomethingelsehascaughtyourattention. G.Stuckinanunwantedconversationhowdoyougetout?
假如你是李华你的美国好友Alice将近期来你所在的城市旅游.请给她写信告诉她你愿意为她安排住宿及旅游行程.同时委托她帮你买一个Coach牌子的小钱包你打算将其作为生日礼物送给妈妈. 注意1.词数100左右2.可以适当增加细节以使行文连贯. DearAlice Yours LiHua.
假如你是红星中学高三学生会__李华下周会有你们友好学校StJohnsonSchool师生交流团来你校访问.作为学生代表你将在全校大会上发表演讲欢迎他们的到来.请你写好这篇发言稿内容包括 1.表达欢迎 2.介绍你校为交流团准备的中国特色的课程及活动的种类和内容 3.表达美好祝愿. 注意1.词数不少于120 2.开头和结尾已给出不计入总词数. Dearfriends Yours LiHua
A.womanheldherphonetightlytoherheartthewayachurch﹣goermightholdaBible.Shewasanxioustotakeapictureofanimpressivebunchofflowersthatsatnotsofarawaybutfirstshehadtogetthroughacrowdofotherspushingtheirwaytodothesame.ThecauseofthiswasBouquetstoArtoneofthemostpopulareventsatthedeYoungMuseuminSanFrancisco. Flowersellerswereaskedtocreateflowerarrangementsthatrespondtopiecesofartondisplayfromancientcarvingstocontemporarysculptures.It'sextremelyattractiveandalsomemorabletothepointthatithasbecomeaproblem. InrecentyearsthedeYoungreceivedmorethanathousandcomplaintsfrompeoplewhofeltthatcellphoneshadspoiledtheirexperienceoftheexhibit.institutionsoffineartaroundtheworldfacesimilarproblemsasthedesiretotakephotographsbecomesahugeattractionformuseumsaswellassomethingthatupsetssomeoftheirpatrons资助人.SothedeYoungrespondedwithakindofcompromisecarvingoutphotofreehoursduringtheexhibition'ssix﹣dayrun. Onecommoncomplaintabouttheeffectofsocialmediaonmuseumcultureisthatpeopleseemtobemissingoutonexperiencesbecausetheyaresobusycollectingevidenceofthem.AstudyrecentlypublishedinthejournalPsychologicalSciencesuggeststhereissometruthtothis.Itfindsthatpeoplewhokeeptakingphotosofanexhibitandpostingthemonsocialmediaratherthansimplyobservingithaveahardtimerememberingwhattheysee.Buttheissueiscomplexfortheprofessionalsrunningmuseums.LindaButlerthedeYoung'sheadofmarketingandvisitorexperienceacknowledgesthatnoteveryonewantsamuseumtobeaphoto﹣takingplayland.Yetalotofpeopledo‑andshebelievesthatthedeYoungisinnopositiontojudgeonereasonforbuyinga＄28tickettobemorevalidthananother.Ifweremovedsocialmediaandphotographyshesayswewouldriskbecomingirrelevant. 1WhatwasthewomaneagertodoaccordingtoParagraph1? A.Togetherphone. B.Totakeaphoto. C.Toescapethecrowd. D.Topushahead. 2HowdidthedeYoungrespondtothedilemma? A.Bysettingperiodswithoutphoto﹣taking. B.Bymakingtheexhibitionfreeofcharge. C.Bycompromisingwiththegovernment. D.Byextendingthefreeexhibitionhours. 3Therecentstudyfindsthattheuseofsocialmediainmuseumsmay. A.uncoverthetruth B.playanegativerole C.accumulateevidence D.causemanycomplaints 4WhichofthefollowingmayLindaButlersupport? A.Cateringtovisitors. B.Reducingadmissionprices. C.Reservingjudgementinpublic. D.Banningsocialmediaandphotography.
一位母亲根据儿子3～9岁身高的数据建立了身高ycm与年龄x岁的回归模型为=7.19x+73.93用这个模型预测这个孩子10岁时的身高则正确的叙述是
QianZhongshuwas1Chinesescholarandwriter2knowforhiswitanderudition博学. DespitefailinginMathematicsQianwasaccepted3theDepartmentofForeignLanguagesunderTsinghuaUniversityin1929becauseofhisexcellent4performinChineseandEnglishlanguages.InTsinghuaHemethiswifeYangJiangwhowas5becomeasuccessfulplaywrightandtranslatorand6marryherin1935.InthesameyearQianreceivedgovernmentsponsorshiptofurtherhisstudiesabroad.TogetherwithhiswifeQianheadedfortheUniversityofOxfordinBritain.After7spendtwoyearsatExeterCollegehereceivedabachelorofliterature.HethenstudiedforonemoreyearintheUniversityofParisinFrancebeforereturningtoChinain1938. QianlivedinShanghaifrom1941to1945whichwasthenunderJapanese8occupy.Manyofhisworkswerewrittenorpublishedduringthisperiodoftime.Acollectionofshort9essayWrittenintheMarginsofLife写在人生边上10publishin1941.HismostcelebratedworkFortressBesiegedappearedin1947.OntheArtofPoetrywritteninclassicalChinesewasissuedin1948.
Prettyinpinkadultwomendonotrememberbeingsoobsessedwiththecolouryetitiswidespreadinouryounggirls'lives.Itisnotthatpinkinherently内在地badbutitissuchatinysliceoftherainbowandthoughitmaycelebrategirlhoodinonewayitalsorepeatedlyandfirmlyblendsgirls'identitytoappearance.Thenitpresentsthatconnectionevenamongtwo﹣year﹣oldsbetweengirlsasnotonlyinnocentbutasevidenceofinnocence.LookingaroundIdespairedattheextremelackofimaginationaboutgirls'livesandinterests. Girls'attractiontopinkmayseemunavoidablesomehowencodedintheirDNAbutaccordingtoJoPaolettianassociateprofessorofAmericanStudiesit'snot.Childrenwerenotcolour﹣codedatalluntiltheearly20thcenturyintheerabeforedomesticwashingmachinesallbabiesworewhiteasapracticalmattersincetheonlywayofgettingclothescleanwastoboilthem.What'smorebothboysandgirlsworewhatwerethoughtofasgender﹣neutraldresses.Whennurserycolourswereintroducedpinkwasactuallyconsideredthemoremasculinecolouradelicateversionofredwhichwasassociatedwithstrength.Bluewithitsintimations暗示oftheVirginMary圣母玛利亚constancyandfaithfulnesssymbolisedfemininity女性化.Itwasnotuntilthemid﹣1980swhenenlargedageandsexdifferencesbecameadominantchildren'smarketingstrategythatpinkfullycameintoitsownwhenitbegantoseeminherentlyattractivetogirlspartofwhatdefinedthemasfemaleatleastforthefirstfewcriticalyears. Ihadnotrealisedhowprofoundlymarketingtrendsinfluencedourperceptionofwhatisnaturaltorelativesincludingourcorebeliefsabouttheirpsychologicaldevelopment.TakingthetoddlerasanexampleIassumedthatphasewassomethingexpertsdevelopedafteryearsofresearchintochildren'sbehaviourwrong.ItturnsoutaccordingtoDanielCookahistorianofchildhoodconsumerismitwaspopularizedasamarketinggimmickbyclothingmanufacturersinthe1930s. Tradepublicationscounseled劝告departmentstoresthatinordertoincreasesalestheyshouldcreateathirdsteppingstonebetweeninfantwearandolderkids'clothes.Itwasonlyaftertoddler学步的小孩becamecommonshoppers'termthatitevolvedintoabroadlyaccepteddevelopmentalstage.Splittingkidsoradultsintoever﹣tiniercategorieshasprovedasafewaytoboostprofits.Andoneoftheeasiestwaystocutupamarketistomagnifygenderdifferences﹣orinventthemwheretheydidnotpreviouslyexist. 1Bysayingitis…therainbowline3Para1theauthormeanspink. A.shouldnotbethesolerepresentationofgirlhood B.shouldnotbeassociatedwithgirls'innocence C.cannotexplaingirls'lackofimagination D.cannotinfluencegirls'livesandinterests 2WhatdoesthewordencodeinPara.2referto? A.discovered B.programmed C.marked D.sealed 3Theauthorsuggeststhatourperceptionofchildren'spsychologicaldevelopmentwasmuchinfluencedby. A.themarketingofproductsforchildren B.theobservationofchildren'snature C.researchesintochildren'sbehavior D.studiesofchildhoodconsumption 4WemaylearnfromParagraph4thatdepartmentstoreswereadvisedto. A.focusoninfantwearandolderkids'clothes B.attachequalimportancetodifferentgenders C.classifyconsumersintosmallergroups D.createsomecommonshoppers'terms 5Itcanbeconcludedthatgirls'attractiontopinkseemstobe. A.clearlyexplainedbytheirinborntendency B.fullyunderstoodbyclothingmanufacturers C.mainlyimposedbyprofit﹣drivenbusinessmen D.wellinterpretedbypsychologicalexperts
Therehavealwaysbeenalotofcommonlybelievedbutfalseideasaboutbeingfatanddoingexercise.Somepeoplebelievethattheycan'thelpputtingonweightastheygetolderwhileothersholdthatiftheystopexercisingtheirmuscleswillturnintofat.Herearesomemoremyths I'llneverloseweight﹣Icomefromafatfamily Wrong!Whilewecan'tchangethebodytypewearebornwithwecan'tblameourgenesformakingusfat.There'splentyofevidencethatfatnessrunsinfamiliesandthemainreasonisthattheysharethesamehabitsofeatingtoomuchandexercisingtoolittle. IamfatbecauseIburncaloriesslowly Wrong!Fatnessisnotcausedbyaslowmetabolism新陈代谢.Infactalthoughfatpeopleconsumemoreenergythanslimpeopletheyalsofailtorealizehowmuchtheyeat!Keepingadiarycanhelpyouworkoutyourdailyfoodintakemoreaccurately. Exerciseisboring Wrong!Anythingwillbecomeboringifyoudoitrepetitively.Thekeyistodevelopabalancedandvariedprogrammethat'sfunaswellasprogressive.IfyouenjoyaSundaywalktakeadifferentroute.Ifyoudoyogatryataichiclass.Ifyoulikeswimmingsetyourselfadistanceortimechallenge. Nopainnogain Wrong!Exerciseisnotmeanttohurt.Indeedpainisyourbodytellingyousomething'swrongandcontinuingtoexercisecouldleadtoseriousinjury.Youmayexperiencemilddiscomfortasyoubegintoexerciseregularlybutthisisyourbodyadaptingtothepositivechangesinyourlifestyleandtheachesshoulddisappearrelativelyquickly.Iftheydon'trestandseekmedicaladvice. 1Whatdoestheauthorthinkaboutbeingfat? A.Itisthefamilygenesthatmakepeoplefat. B.Peoplearefatbecausetheyconsumetoolittleenergy. C.Adiaryofexercisecanpreventpeoplefrombecomingfat. D.Itistheconsequenceofpeople'sunbalancedlifestyle. 2Accordingtotheauthorhowcanwemakeexercisemoreinteresting? A.Bytakingvariedexercise. B.Bychoosingsimpleexercise. C.Bydoingregularexercise. D.Bystickingtooutdoorexercise. 3Whatisthepurposeofthepassage? A.Todeclaretheimportanceofkeepingfit. B.Toclarifysomemisconceptionsaboutfatnessandexercise. C.Toconfirmwhathaslongbeenbelievedaboutkeepingfit. D.Toexplainsomemedicalfactsaboutbeingfatanddoingexercise.
Somepigstendtobeoptimisticwhileothersaremorepessimisticaccordingtoanewresearchthatismeaningfultoanimalwelfare.ThestudypublishedinthejournalBiologyLettersisthefirsttoshowthatmoodandpersonalityinteractinananimalinfluencingjudgment. AsheraresearcherattheUniversityofNewcastle'sInstituteofNeuroscienceandherteamhousedgroupsofpigsintwotypesofenvironment.Onereflectedstandardcommercialconditionsandtheotherwascushierwithmorespaceandplentyofsoftdeepstraw.Afterthepigsgotaccustomedtothesenewhomesoverafewweekstheresearcherspicked18pigsfromeachtypetotrainandtesttheirjudgment. Todothiswetrainedeachpigthatinonecornerofatrainingroomtherewouldbeabowlwithchocolatesweets﹣pigslovethem﹣andattheoppositesideoftheroomtherewouldbeabowlcontainingcoffeebeanswhichpigsfindbitter﹣tastingaresearchersaid. Overanumberoftrainingtrialspigslearnedtogotothebowlreliablywhenitwasinthecornerwheretheyhadfiguredouttoexpectchocolatesweets.Onthecontrarytheyquicklylearnedtoavoidthebowlwhenitwasinthecornerwheretheywouldexpecttofindthecoffeebeans. Theresearchersnextplacedanunfamiliarbowlindifferentlocationstoseehowthepigswouldreact.Somegailydashedtothebowlnomatterwhatshowingoptimismthatitwouldcontaintheirfavoritesweets.Othershoweverbehavedasthoughtheyexpectedittocontaincoffeebeansdisplayingpessimism. Thefindingssuggestthataone﹣size﹣fits﹣allanswertoanimalwelfareissuesdoesnotexist.Evenifpigsarejustequaltobaconorothermeatforsomepeoplethereisstillcauseforconcern.Studieshavesuggestedthathowananimalistreatedduringitslifetimecandirectlyaffectmeatqualityandtaste. 1Whatwasthestudytryingtofigureout? A.Howtomakepigshappier. B.Thesimilaritiesbetweenhumansandpigs. C.Howlivingenvironmentaffectedpigs'mood. D.Howpigs'moodandpersonalityaffectedtheirjudgment. 2WhatdoestheunderlinedwordcushierinParagraph2mean? A.Simple. B.Morecomfortable. C.Unpractical. D.Lessfree. 3Whichbowlcantestwhetherapigisoptimisticorpessimistic? A.Thebowlwithchocolatesweets. B.Thebowlcontainingcoffeebeans. C.Thebowlfullofbothsweetsandbeans. D.Thebowlunfamiliartotwotypesofpigs. 4Whatdothefindingsofthenewresearchimply? A.Peopleshouldtreatpigsequally. B.People'shealthreliesonmeatquality. C.Peopleshouldmeetpigs'variousneeds. D.People'sattitudetowardpigsistotallywrong.
函数fx=的定义域为
MykidsandIwereheadingintothesupermarketovertheweekend.Onthewaywespottedamanholdingapieceofpaperthatsaid1myjob.FamilytoFeed. Atthisstorea2likethisisnotnormal.My10﹣year﹣oldnoticedhimandmakea3onhowbaditmustbetohavetostand4inthecoldwind. InthestoreIaskedeachofmykidsto5somethingtheythoughtourfriendtherewould6.Theygotapplesasandwichandabottleofjuice.Thenmy17﹣year﹣oldsuggestedgivinghima7.Ithoughtaboutit.Wewere8oncashourselvesbut…wellsometimes9fromourneedinsteadofourabundanceis10whatweneedtodo!Allthekids11somethingtheycoulddoawaywithfortheweek. Whenwehandedhimthebagof12helitupandthankeduswith13eyes.WhenIhandedhimthegiftcardsayinghecoulduseitfor14hisfamilymightneedheburstintotears. Thishasbeenawonderful15forourfamily.Fordaysthekidshavebeenlookingforotherswecan16!Thingswouldhaveplayedoutso17ifIhadsimplysaidNowereallydon'thave18togivemore.Steppingoutnotonlyhelpedabrotherin19italsogavemykidsthe20tasteofhelpingothers.It'llgoalongwaywiththem. 1A.Quit B.Changed C.Lost D.Finished 2A.condition B.place C.sight D.show 3A.suggestion B.comment C.decision D.call 4A.by B.proudly C.outside D.angrily 5A.draw B.say C.arrange D.pick 6A.appreciate B.supply C.order D.discover 7A.dollar B.job C.hotmeal D.giftcard 8A.easy B.low C.soft D.loose 9A.giving B.saving C.spending D.begging 10A.yet B.even C.still D.just 11A.declared B.shared C.ignored D.expected 12A.food B.medicine C.toys D.clothes 13A.sleepy B.watery C.curious D.sharp 14A.whoever B.whatever C.whichever D.whenever 15A.message B.example C.experience D.adventure 16A.relyon B.respect C.learnfrom D.help 17A.suddenly B.vividly C.differently D.perfectly 18A.time B.power C.patience D.money 19A.need B.love C.fear D.memory 20A.strong B.sweet C.strange D.simple
欧拉公式eix=cosx+isinxi为虚数单位是由瑞士著名数学家欧拉发明的它将指数函数的定义域扩大到复数建立了三角函数和指数函数的关系它在复变函数论里占有非常重要的地位被誉为“数学中的天桥”根据欧拉公式可知e2i表示的复数在复平面中位于
假定英语老师上课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.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字符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下面划一横线并在横线下面写出修改后的词. 注意1.每处错误及其修改仅限一词. 2.只允许修改10处多者从第11处起不计分. Tomwashavingmuchtroublegetupinthemorningandwasalwayslatewithwork.Hisbosswantedtofirehimifhedidn'tstartcomingontimebuthewenttothedoctorforahelp.Thedoctorgavehimsomemedicineandtoldhimtotakethembeforehewenttobed.Themandoesastoldandsleptreallywellwakeupbeforethealarmhadevengoneoff.Hehadtimeforaproperlybreakfastandwasthefirstreachthefactory.Bosshesaidthatmedicinereallyworks!I'mpleasingtohearitsaidhisbossbutwherewereyouyesterday?
执行如图程序框图若输入的x的值为1则输出的n的值为．
在各项均为正数的数列{an}中a1=a且an+1=． 1当a3=2时求a的值 2求证当n≥2时an+1≤an
下列函数是奇函数的是
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