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Marian Bechtel sits at West Palm Beach's Bar Louie counter by herself, quietly reading her e﹣book a...
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高三下学期英语《》真题及答案
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根据句义和汉语提示完成下列句子使句意完整1.Let’sgotothe__________图书馆.2.
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ThepolarbearisfoundintheArcticCircleandsomebiglandmassesasfarsouthasNewfoundland.Whiletheyarerarenorthof88°thereisevidence1theyrangeallthewayacrosstheArcticandasfarsouthasJamesBayinCanada.Itisdifficulttofigureoutaglobalpopulationofpolarbearsasmuchoftherangehasbeen2poorstudiedhoweverbiologistscalculatethatthereareabout20000﹣25000polarbearsworldwide. Modernmethods3trackingpolarbearpopulationshavebeenemployedonlysincethemid﹣1980sandareexpensive4performconsistentlyoveralargearea.InrecentyearssomeInuitpeopleinNunayut5reportincreasesinbearsightingsaroundhumansettlementsleadingtoa6believethatpopulationsareincreasing.Scientistshaverespondedby7notethathungrybearsmaybecongregating聚集aroundhumansettlementsleadingtotheillusion错觉thatpopulationsare8highthantheyactuallyare.Of9nineteenrecognizedpolarbearsubpopulationsthreearedecliningsix10bestableoneisincreasingandninelackenoughdata.
已知AB是以O为圆心的单位圆上的动点且||＝则•＝
IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
已知向量＝cos15°sin15°＝cos75°sin75°则|﹣2|＝．
Manyfamiliesusuallytaketheirchildrentotravelduringschoolbreaks.ButJulieandTimRivenbarkplannedan1vacationwiththeirtwochildren﹣aone﹣yeartriparoundtheworld.Theyplanto230countriesinall. Rightnowthefourtravellersareabouthalfwaythroughtheir3.Ms.Rivenbarksaystheyaretryingtoseeasmuchofthe4astheycan. Mr.Rivenbarksaysthefamilyhas5onostrich鸵鸟birdselephantsandcamels.Buthesaysoneofthemost6experiencesofthetriphasbeenmeetingnewpeople. Peoplehavebeen7friendlyandwelcomingandloveourkids﹣andit'slovelytoseetheminteracting互动withnewpeopleandtheir8toseeourkidsenjoyingthemselvesintheircountry. Eleven﹣year﹣oldTylersayshehasenjoyed9aboutthepeopletheyhavemet.IlearnedinAfricathatpeoplehavevery10lifestylestothoseinAmerica.HissisterKara11thatshelikedThaifood. Ms.Rivenbarksaysthatthetripis12thechildrenalotmorethanshortvisitswouldhave.Ithinkthatthelongerwetravelthemore13ithasonhowtheyseetheworld.Icanseethem14morethantheycanseethemselvesshesaid. Ittookthefamilyayearto15forthetrip.Theyhadtoselltheirhouseandcars.Ms.Rivenbark16herjobandherhusbandisusingunpaidleave.Theycarrysmallbags17lightweightclothingandwhateverelsetheyneed.Ms.Rivenbarksaysshe18beingabletocarryeverythingsheneedsonherback. TylerandKaraeachhaveiPadssotheycancommunicatewithteacherstostay19withtheirschoolwork.Tylerisalso20a365﹣dayvideoblog. 1A.shorter B.important C.complicate D.longer 2A.pass B.visit C.walk D.guide 3A.destination B.experience C.trip D.voyage 4A.world B.nature C.forest D.country 5A.competed B.kicked C.shot D.ridden 6A.scary B.surprising C.exhausting D.interesting 7A.largely B.extremely C.mainly D.rarely 8A.caution B.passion C.reaction D.attention 9A.teasing B.learning C.attracting D.copying 10A.similar B.different C.odd D.special 11A.discovered B.realized C.suggested D.explained 12A.witnessing B.exploring C.teaching D.studying 13A.benefit B.influence C.reflection D.action 14A.changing B.concerning C.understanding D.sharing 15A.leave B.hope C.fight D.prepare 16A.adjusted B.designed C.quit D.found 17A.filledwith B.consistedof C.carriedout D.takenalong 18A.practices B.prefers C.enjoys D.dislikes 19A.rapid B.active C.fresh D.current 20A.completing B.creating C.revising D.managing
设函数x∈R则fx是
实数ab满足2a＝5b＝10则下列关系正确的是
MostpeoplewhoowniPhonesusethemastheiralarmclocks﹣makingitveryeasytocheckemailsonelasttimebeforefallingasleepandhardtoeverfeelawayfromworkandsocialnetworks. Severalyearsagomybossfaintedduetoexhaustionafterstayinguplatetocatchuponwork.Shebangedherheadandendedupwithfivestitches缝针﹣andbecamewhatshecallsasleepevangelist传教士.Nowsheleavesherphonecharginginanotherroomwhenshegoestobedandencouragesherfriendstodothesame. IsentallmyfriendsthesameChristmasgift﹣alovelyalarmclock﹣sotheycouldstopusingtheexcusethattheyneededtheirveryattractiveiPhonesbytheirbedstowakethemupinthemorning.shesaid. Ifyourphonewakesyouupinthemorningitmayalsobekeepingyouupatnight.A2008studyshowedthatpeopleexposedtomobileradiationtooklongertofallasleepandspentlesstimeindeepsleep.Thestudyindicatesthatduringlaboratoryexposureto884MHzwirelesssignalscomponentsofsleepbelievedtobeimportantforrecoveryfromdailywearandtearareseverelyaffectedthestudyconcluded. AquarterofyoungpeoplefeelliketheymustbeavailablebyphonearoundtheclockaccordingtoaSwedishstudythatlinkedheavycellphoneusetosleepingproblemsstressanddepression.Unreturnedmessagescarrymoreguiltwhenthetechnologytodealwiththemliesatourfingertips.Someteensevenreturntextmessagesatmidnight. Mostofuschoosenottosetlimitsonournighttimeavailability.Nearlythreequartersofpeoplefromtheageof18to44sleepwiththeirphoneswithinreachaccordingtoa2012Timepoll.Thatnumberfallsoffslightlyinmiddleagebutonlypeopleaged65andolderareleavingthephoneinanotherroomascommonassleepingrightnexttoit. 1Whydidtheauthor'sbossstarttoenjoysleeping? A.Herfriendsencouragedhertosleepontime. B.Mobilephonescouldn'twakeherupontime. C.Herfriendssentheralovelyclocktowakeherup. D.Shegothurtduetoworkingtoolate. 2Whydidtheauthor'sbossgiveherfriendsalarmclocksasChristmasgifts? A.Alarmclocksdon'tgiveoffanyradiation. B.Alarmclocksarebetteratwakingherfriendsup. C.Sheadvisedthemtoreplacephoneswithalarmclocks. D.Sheusedalarmclockstoremindthemnottoworktoolate. 3Whatcanwelearnfromthe2008study? A.Mobileradiationmakespeopleunabletofallasleep. B.Mobilephonescanrelease884MHzwiredsignals. C.Sleepcanhelppeoplefightagainstradiation. D.Componentsofsleepcanbeseriouslyaffectedbywirelesssignals. 4Whatisthebesttitleforthepassage? A.HowMobilePhonesAffectSleep B.WhyAlarmClocksAreBetterthanPhones C.Howwecansleepbetteratnight D.HowMobilePhonesAffectHealth
不等式x2≥2x的解集为
NeedaJobThisSummer? Theprovincialgovernmentanditspartnersoffermanyprogramstohelpstudentsfindsummerjobs.Thedeadlinesandwhatyouneedtoapplydependontheprogram. Notastudent?Gotothegovernmentwebsitetolearnaboutprogramsandonlinetoolsavailabletohelppeopleunder30buildskillsfindajoborstartbusinessesallyearround. JobsforYouth Ifyouareateenagerlivingincertainpartsoftheprovinceyoucouldbeeligible符合条件forthisprogramWhichprovideseightweeksofpaidemploymentalongwithtraining. WhoiseligibleYouth15﹣18yearsoldinselectcommunities社区. SummerCompany SummerCompanyprovidesstudentswithhands﹣onbusinesstrainingandawardsofupto$3000tostartandruntheirownsummerbusinesses. WhoiseligibleStudentsaged15﹣29returningtoschoolinthefall. StewardshipYouthRangerProgram YoucouldapplytobeaStewardshipYouthRangerandworkonlocalnaturalresourcemanagementprojectsforeightweeksthissummer. WhoiseligibleStudentsaged16or17attimeofhirebutnotturning18beforeDecember31thisyear. SummerEmploymentOpportunities机会 ThroughtheSummerEmploymentOpportunitiesprogramstudentsarehiredeachyearinavarietyofsummerpositionsacrosstheProvincialPublicServiceitsrelatedagenciesandcommunitygroups. WhoiseligibleStudentsaged15orolder.Somepositionsrequirestudentstobe15to24orupto29forpersonswithadisability. 1WhatisspecialaboutSummerCompany? A.Itrequiresnotrainingbeforeemployment. B.Itprovidesawardsforrunningnewbusinesses. C.Itallowsonetoworkinthenaturalenvironment. D.Itoffersmoresummerjobopportunities. 2WhatistheagerangerequiredbyStewardshipYouthRangerProgram? A.15﹣18. B.15﹣24. C.15﹣29. D.16﹣17. 3Whichprogramfavorsthedisabled? A.JobsforYouth. B.SummerCompany. C.StewardshipYouthRangerProgram. D.SummerEmploymentOpportunities.
已知函数fx＝ax3+btanx+6ab∈R且则＝
已知△ABC的三内角ABc的对边分别为abc且△ABC的面积则角A＝
已知△ABC的三内角ABC的对边分别为abc若∠B＝60°则边c＝．
一建筑物AB的底部B无法到达为了测得此建筑物的高度在地面CD两处分别测得建筑物最高处A的仰角分别为αβα＞β已知BCD三点共线且CD两处的距离为a米不计测量工具的高度则建筑物的高度AB＝米．
假定你是李华暑假在伦敦学习得知当地美术馆要举办中国画展.请写一封信申请做志愿者内容包括 1.写信目的 2.个人优势 3.能做的事情. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.结束语已为你写好.
已知fx＝sinx+cosx若函数gx＝fx﹣m在x∈0π上有两个不同零点αβ则cosα+β＝．
已知函数fx＝为偶函数． 1求实数a的值 2记集合E＝{y|y＝fxx∈{﹣112}}λ＝lg22+lg2lg5+lg5﹣判断λ与E的关系 3当x∈[]m＞0n＞0时若函数fx的值域为[2﹣3m2﹣3n]求mn的值．
已知等差数列{an}满足a1+a2＝10a4﹣a3＝2 1求{an}的通项公式 2设等比数列{bn}满足b2＝a3b3＝a7问b6与数列{an}的第几项相等
设a＞1则关于x的不等式的解集是
在等差数列{an}中已知前15项之和S15＝90那么a8＝
Asdataandidentitytheftbecomesmoreandmorecommonthemarketisgrowingforbiometric生物测量technologies﹣likefingerprintscans﹣tokeepothersoutofprivatee﹣spaces.Atpresentthesetechnologiesarestillexpensivethough. ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalow﹣costdevice装置thatgetsaroundthisproblemasmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence节奏withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thusthekeyboardcandeterminepeople'sidentitiesandbyextensionwhethertheyshouldbegivenaccesstothecomputerit'sconnectedto﹣regardlessofwhethersomeonegetsthepasswordright. Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently. Inastudydescribingthetechnologytheresearchershad100volunteerstypethewordtouchfourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytypedwithverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlymadeofinexpensiveplastic﹣likeparts.Theteamhopestomakeittomarketinthenearfuture. 1Whydotheresearchersdevelopthesmartkeyboard? A.Toreducepressureonkeys. B.Toimproveaccuracyintyping. C.Toreplacethepasswordsystem. D.Tocutthecostofe﹣spaceprotection. 2Whatmakestheinventionofthesmartkeyboardpossible? A.Computersaremucheasiertooperate. B.Fingerprintscanningtechniquesdevelopfast. C.Typingpatternsvaryfrompersontoperson. D.Datasecuritymeasuresareguaranteed. 3Whatdotheresearchersexpectofthesmartkeyboard? A.It'llbeenvironment﹣friendly. B.It'llreachconsumerssoon. C.It'llbemadeofplastics. D.It'llhelpspeeduptyping. 4Whereisthistextmostlikelyfrom? A.Adiary. B.Aguidebook. C.Anovel. D.Amagazine.
已知等比数列{an}是递增数列Sn是{an}的前n项和若a1a3是方程x2﹣5x+4＝0的两根则S6的值为
如图在△ABC中已知点D在BC边上且AD⊥ACsin∠BAC＝． 1求AD的长 2求△ABC的面积．
已知函数fx＝cosxcosx﹣+sin2x﹣． 1求fx的最小正周期T 2设gx＝afx+b若gx在[﹣]上的值域为[03]求实数ab的值 3若fx+1+﹣1n﹣1m＞0对任意的x∈[﹣]和n∈N*恒成立求实数m的取值范围．
已知△ABC的三内角ABC的对边分别为abcacosA+C+bcosA＝0． 1试判断△ABC的形状并说明理由 2若△ABC的周长为5且求c的值．
△ABC的内角ABC的对边分别为abc．已知a＝c＝2cosA＝则b＝
已知0sinα＝ 1求tanα的值 2求的值 3求sin2α+的值．
定义在R上的奇函数fx当x≥0时 fx＝ 则关于x的函数Fx＝fx﹣a0＜a＜1的所有零点之和为
函数y＝的图象大致是
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限一词. 2只允许修改10处多者从第11处起不计分. InthepastveryfewforeignersvisitedthesouthfootoftheHimalayas.LatermanyJapanesewenttherebecausethehonestyofasmallboy. OnedaysomeJapanesephotographersaskedalocallyboytobuysomebottlesofbeerwhichtooktheboythreehours.Thenextdaytheboyvolunteeredtohelphimandoneofthephotographersgavehimlotsofmoney.Buttheboydidn'treturnbackontime.Thethirdnighttheboyknockedatthedoorsofthephotographertellinghimthatheboughtfourbottlesofbeeratonestoreclimbingamountainandcrossedarivertobuyanothersix.Onthewaybackthreebottleswasbroken.Hecriedandbroughtthebrokenpiecestothephotographerbutgavehimthechange. Thepeoplethereweremoving.Thenmoretravelerscametotheplace.
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