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已知函数f(x)=cos(2x+),将函数y=f(x)的图象向右平移后得到函数y=g(x)的图象,则下列描述正确的是( )
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高一下学期数学《》真题及答案
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已知向量a=mcos2xb=sin2xn函数fx=a·b且y=fx的图像过1求mn的值2将y=fx的
已知函数fx=log2x+1将函数y=fx的图象向左平移一个单位再将图象上所有点的纵坐标伸长到原来的
已知函数y=3sinωxω>0的周期是π将函数y=3cosωx﹣ω>0的图象沿x轴向右平移个单位得到
3sin(2x﹣
)
3sin(2x﹣
)
3sin(2x+
)
3sin(2x+
)
已知函数fx=sin+sin-2cos2x∈R其中ω>0.1求函数fx的值域2若对任意的a∈R函数y
已知二次函数fx满足fx+1-fx=2x且f0=1.1求解析式fx2当x∈[-11]时函数y=fx的
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
已知函数fx=2x-将y=fx的图象向右平移两个单位得到y=gx的图象.1求函数y=gx的解析式2若
已知向量a=mcos2xb=sin2xn函数fx=a·b且y=fx的图像过1求mn的值2将y=fx的
已知函数fx=sin2x++cos2x++2sinxcosx.Ⅰ求函数fx图象的对称轴方程Ⅱ将函数y
已知函数y=f2x+2x是偶函数且f2=1则f﹣2=
5
4
3
2
已知向量a=mcos2xb=sin2xn函数fx=a·b且y=fx的图像过点1求mn的值2将y=fx
已知函数fx=sin2x+cos2x−.1求y=fx图象的距原点最近的对称中心的坐标;2设gx=si
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
已知函数fx=cos2x﹣+cos2x将函数fx的图象向左平移φφ>0个单位长度得到函数gx的图象若
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
已知函数fx=cos-cos2x其中x∈R.给出下列四个结论①函数fx是最小正周期为π的奇函数②函数
1
2
3
4
函数y=fx的图象向右平移单位后与函数y=sin2x的图象重合则y=fx的解析式是
f(x)=cos(2x﹣
)
f(x)=cos(2x+
)
f(x)=cos(2x﹣
)
f(x)=cos(2x+
)
将函数y=sin2x+的图象向右平移个单位长度后得到的图象对应的函数解析式为
y=sin2x
y=sin(2x﹣
)
y=cos2x
y=cos(2x﹣
)
①若fx是[﹣44]上的单调增函数且f2x﹣1<fx+2求x的取值范围.②已知函数fx=﹣x2+|x
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如图所示可在竖直平面内转动的平台上固定着一个内壁光滑的气缸气缸内有一导热活塞活塞底面与气缸底面平行一定量的气体做密封在气缸内.当平台倾角为37°时气缸内气体体积为V然后将平台顺时针缓慢转动直至水平该过程中可以认为气缸中气体温度与环境温度相同始终为T0平台转至水平时气缸内气体压强为大气压强p0的2倍.已知sin37°=0.6cos37°=0.8. i当平合处于水平位置时求气缸内气体的体积 i若平台转至水平后经过一段时间环境温度缓慢降至0.9T.大气压强p0保持不变该过程中气缸内气体放出0.38P0V的热量求该过程中气体内能的变化量△U.
BecauselikemostofyouIbegancollegeinmyteensbutthesecondyearIwasofferedmydreamjobatUniversalStudiossoIdroppedout. WellIleftcollegebecauseIknewexactlywhatIwantedtodoandsomeofyouknowtoo﹣butsomeofyoudon't.Ormaybeyouthoughtyouknewbutarenowquestioningthatchoice.Maybeyou'resittingtheretryingtofigureouthowtotellyourparentsthatyouwanttobeadoctorandnotacomedywriter. Itoldmyparentsifmymoviecareerdidn'tgowellI'dre﹣enroll.Itwentallright.ButeventuallyIreturnedforonebigreason. MostpeoplegotocollegeforaneducationandsomegofortheirparentsbutIwentformykids.I'mthefatherofsevenandIKeptinsistingontheimportanceofgoingtocollegebutIhadn'twalkedthewalk.SoinmyfiftiesIre﹣enrolledatCalState﹣LongBeachandIearnedmydegree. Wellwhatyouchoosetodonextiswhatwecallinthemoviesthe'character﹣definingmoment.' Lifeisonestronglongstringofcharacter﹣definingmoments.AndIwasluckythatat18IknewwhatIexactlywantedtodo.ButIdidn'tknowwhoIwas.HowcouldI?Andhowcouldanyofus?Becauseforthefirst25yearsofourliveswearetrainedtolistentovoicesthatarenotourown.Parentsandprofessorsfillourheadswithwisdomandinformationandthenemployersandmentors有经验的顾问taketheirplaceandexplainhowthisworldreallyworks. AndIwanttobeclearthatyourintuition直觉isdifferentfromyourconscience.Theyworktogetherbuthere'sthedistinctionYourconscienceshoutshere'swhatyoushoulddowhileyourintuitionwhispershere'swhatyoucoulddo.Listentothatvoicethattellsyouwhatyoucoulddo.Nothingwilldefineyourcharactermorethanthat. 29.Theauthorwenttocollegeinhisfiftiesinorderto. A.getaneducationaldegree B.goforhisparents C.givehidchildrenanexample D.earnagoodreputation 30.Accordingtotheauthor'sviewwhatshouldwemainlyfollowwhenwechooseourcareer? A.Ourparents'advice. B.Ourownintuition. C.Ourconscience. D.Ourteachers'advice 31.What'stherightorderoftheeventsinthespeech? ①Tookhisjob②Gotmarriedandhadchildren ③Graduatedfromcollege④Droppedoutofchildren A.④③①② B.④③②① C.④①②③ D.④②①③
Abusybraincanmeanahungrybody.Weoftenseekfoodafterfocusedmentalactivitylikepreparingforanexam.Researchersthinkthatheavyboutsofthinkingdrainenergyfromthebrainwhosecapacitytostorefuelisverylimited. Sothebrainsensingthatitmaysoonrequiremorecalories卡路里tokeepgoingapparentlystimulatesbodilyhungerandeventhoughtherehasbeenlittleinthewayofphysicalmovementbodilyhungerandeventhoughtherehasbeenlittleinthewayofphysicalmovementorcalorieconsumptionweeat.Thisprocessmaypartlyaccountfortheweightgainsocommonlyseenincollegestudents. ScientistsattheUniversityofAlabamaatBirminghamandanotherinstitutionrecentlyexperimentedwithexercisetocountersuchimmoderatelypost﹣﹣studyfoodconsumption. GaryHunteranexercisephysiologistatU.A.B.oversawthestudy.Hunternotesthattoughactivitybothincreasestheamountofbloodsugarandlactate乳酸盐﹣circulatinginthebloodandincreasesbloodflowtothehead.Becausethebrainusessugarandlactateasfuelresearcherswonderediftheincreasedflowoffuel﹣richbloodduringexercisecouldfeedanexhaustedbrainandreducetheurgetoovereat. Thirty﹣﹣eighthealthycollegestudentswereinvitedtoU.A.B.'sexerciselabtoreportwhattheirfavoritepizzawas.Atalaterdatethevolunteersreturnedandspent20minutesdealingwithselectionsfromcollegeandgraduate﹣﹣schoolentranceexams.Nexthalfthestudentssatquietlyfor15minutesbeforebeinggivenpizza.Therestofthevolunteersspentthose15minutesdoingintervalsonatreadmilltwominutesofhardrunningfollowedbyaboutoneminuteofwalkingrepeatedfivetimes.Huntersaysthatshouldstimulatethereleaseofsugarandlactateintothebloodstream.Thesestudentswerethenallowedtogorgeonpizzatoo.Butbyandlargetheydidnotovereat.Infactthenon﹣exercisershoweverconsumedabout100caloriesmore. Thestudyhaslimitationsofcourse.Weonlylookedatlunch.Huntersaystheresearchersdonotknowiftherunnersconsumedextracaloriesatdinner.TheyalsocannottellwhetherothertypesofexercisewouldhavethesameeffectasrunningalthoughHuntersaystheysuspectthatifanactivitycausessomeonetobreakintoasweatitshouldalsoincreasebloodsugarandlactatefeedingthebrainandweakeninghunger'scall. 63.Accordingtothepassagemaycausemanycollegestudentstoovereatandgainweight. A.alotofenergy﹣consumingmentalactivities B.numerousphysicalmovementsorcalorieburning C.failuretoresistthetemptationofdeliciousfood D.bodilyhungercausedbyphysicalgrowth 64.Theunderlinedwordcounterisclosestinmeaningto. A.stimulateB.maximizeC.balanceD.prevent 65.Whatcanbeinferredfromthepassage? A.Runningismorebeneficialthanwalking. B.Sweatinginexercisecanmakepeoplehungrier. C.Theamountofbloodsugarandlactatecanaffectpeople'sappetite. D.Whenthebrainfeelsexhaustedpeopletendtodoexerciseforrelaxation. 66.WhichofthefollowingstatementsisFALSE? A.Mentalactivitiescanmakepeoplefeelhungry. B.Physicalexercisecanmakepeoplerefreshedandstayhungry. C.Sugarandlactatecanhelpenergizeandrestorepeople'sbrain. D.It'suncertainwhattypesofexercisecaneffectivelyfeedthebrain.
Wecanhaveconflictswithourimportantpersonslikefriendsrelativesetc.Inaheated61argueweusuallyuserudewordstomadesurewegainanadvantage62theotherperson.Thenthewholesituationgoesbadly.Soweshouldmakesurethattherearenoruderemarksandthesituation63moveinapositivedirection. It'seasyforustothinkwe'rerightand64somethingisn'tworkingoutitmustbesomeoneelse'sfault. 65ifyouaimtosolveaconflictyoushouldshowsomerespectandallowtheotherpartytoexpress66they.UsingremarklikeIunderstandyourconcernonthiswouldmaketheotherfeelmoreappreciated. Sometimessomepeoplegettooexcitedandmanybehaveinthewrongway.Thiscancausea67badsituation.Actuallytheyshouldcontroltheiremotionsandkeepcalm.Thishasto68learnthroughswlf﹣control. Thetipsmentionedaboveareusefulformostsituations.Howeverwedon'truleoutthepossibilitythattherearesomepeople69alwayswanttocreatesomesortoftroubleforothers.70putinanefforttoresolveaconflictwiththemmayjustnotbeawiseidea.Thebestwaytodealwiththesepeopleistoforgetthem.
A.technologyB.contemporaryC.stretchedD.hiddenE.recognized F.discoveryG.updatedH.extensiveI.countlessJ.estimatedK.definition Mostofuslearnatprimaryschoolthattherearesevencontinentsbutthenextgenerationofkidsmaybeaddingonemoretothatlist. AccordingtoarecentpaperpublishedintheGeologicalSocietyofAmericanJournalbyagroupofresearchersZealandiaisanewcontinentthat's31beneaththeocean. Zealandiais32tobefivemillionsqkm.MostofthismassiveareaiscoveredbywaterbutitshighestmountainsalreadyhavetheirownnameNewZealand. ThesmallcountryistheonlypartofZealandiathatisn'tunderwaterbutthepaper'sauthorswantthehugelandmasstobe33worldwideasitsowncontinent. ThescientificvalueofclassifyingZealandiaasacontinentismuchmorethanjustanextranameonalisttheresearcherswroteintheirpaper. ScientistsdiscoveredZealandiaallthewaybackin1995thenstarted34researchontheareausingunderwaterandsatellitemapping35.AftercompletingtheirworktheywerefinallyabletowriteareportsuggestingthatZealandiabenamedacontinent. Butwhodecidesonwhatisacontinentandwhatisn't?Thereisinfactnoofficialorganizationthatdoes.Somecountries'schoolsteachthattherearesixorevenfivecontinents.Thischangesdependingonwhereintheworldschoolis. Duetotheir36asacontinuousexpanseoflandsomeclassifyEuropeandAsiaasthesamecontinent﹣﹣knownasEurasia.SchoolsinRussiaandpartsofEasternEuropeteachthis. AndtomakethingsevenmoreconfusingFranceandGreeceaswellasothercountriesclassifyNorthAmericaandSouthAmericaassimplyAmerica. Thisargumentoverhowlandisdefinedhaseven37intoouterspace.In2006theInternationalAstronomicalUnionIAUdecidedthatPlutowasnolongeraplanet76yearsafterits38in1930.Expertsarguedthatitnolongermettherequirementsneededtobecalledaplanetalongsidetheeightothersinoursolarsystem.Itwasthereforerenamedadwarfplanet矮行星meaningthat39booksmodelsandmuseumexhibitsallovertheworldhadtobe40. ButwilltheworldtakethesamenoticeofZealandia?Thebestwaytotellistokeepaneyeonourtextbooks.
Grandmaalwaysmadeyoufeelshehadbeenwaitingtoseeyouandaccompanyyoualldaybutnowthedaysweregone.Shewas41ofsufferingfromAlzheimer'sdiseasewhenIwasakid.Iwas42asallkidsaresoIdidn'tthink43aboutit. Inmyfamilymygrandmaistheglue44ustogether.Iremembergoingtomygrandparents'farmhouseeverymomentIcouldwhenIwasakidwhereIalwaysenjoyedher45.LittledidIknowthesewouldbethe46ofmychildhoodthatIwouldmissthemost. AsIgrewupI47mygrandmachanging.Atfirstitwas48littlethings.OnceagainIdidn'tthinkitwasserious.Icouldneverhaveguessed49itwouldprogresstransformingmygrandmaintosomeoneIcould50recognize. OnedaymyfatherandIwenttovisitmygrandparents.We51thetimetalkingforhours52.Thenwith53eyesstaringrightpastmemygrandmaaskedNowyou'regraduatingthisyeararen'tyou?IwasafreshmansoIwas54whyshewasaskingmeaboutgraduation. Ittookmyfatherlongto55aresponseYes.Shemaynotknowwheresheisbutshewillbetherenomatterwhathappens.Iheardthe56inhisvoice. 57atsixteenIhaveabetterunderstandingofAlzheimer'sdisease.Itgreatly58metoknowthatonedayGrandmawill59beabletolookatmeandsayThatismygranddaughter.Sodon'tforgetallyour60outthere.Inotherwordsrememberthosewhocan't. 41.A.reformed B.thought C.informed D.reminded 42.A.thoughtful B.selfish C.foolish D.careful 43.A.second B.twice C.highly D.greatly 44.A.holding B.taking C.carrying D.pushing 45.A.happiness B.praise C.company D.comfort 46.A.thoughts B.stories C.feelings D.memories 47.A.accepted B.noticed C.met D.heard 48.A.just B.also C.already D.yet 49.A.what B.why C.how D.when 50.A.rarely B.seldom C.little D.hardly 51.A.wasted B.killed C.spent D.spared 52.A.occasionally B.regularly C.usually D.continuously 53.A.empty B.bright C.open D.wide 54.A.frustrated B.confused C.embarrassed D.discouraged 55.A.comeup B.putup C.comeupwith D.putupwith 56.A.relief B.happiness C.kindness D.sadness 57.A.Therefore B.However C.Thus D.Indeed 58.A.surprises B.excites C.encourages D.upsets 59.A.anylonger B.anymore C.nomore D.nolonger 60.A.elders B.ancestors C.relatives D.family
8分OnehotsummerIwastravelingdownthefreewayonadaytriptoLosAngeles.Duringmyjourneydownthehighwayanothermotoristsuddenlystartedcuttingintomylane.Beinginthefarrightlanemycarwasforcedontotheshoulderoftheroad.BeinganexperienceddriverIsteeredmycarbackontothehighwaythemotoristdroveawaywithoutsayinganything. WhileIwasn'tveryhappywiththepersonforcuttinginfrontofmeIdecidedtoconsideritanhonestmistake﹣alackofattentiontothelanechangeoradriverlostinthought.Itcertainlycouldnothavebeendoneonpurpose.Thecarspedawayaftercuttinginfrontmeandwassoonoutofsight. AfterawhileIcaughtupwiththesamemotoristonthesideoftheroad.Hewasanelderlygentlemanwhowaswalkingalongthesideofthefreewayonthishotday.WithhiscarstoppedonthesideoftheroadandthenearestservicesatleasttwentymilesawayIdecidedtostopandseewhattheproblemwas. Theman'scarhadaflattireandwhilehehadasparetirehedidn'thaveajack.Idecidedtohelphimandallowedhimtositinmyair﹣conditionedcarwhileIchangedhistire.FifteenminuteslaterIwashotsweatyanddirtybutIdidfeelgoodafterdoingsomethingforsomeone. 32.Whichofthefollowingwordcanbestdescribetheauthor? A.Bad﹣tempered.B.Humorous.C.Hard﹣working.D.Kind﹣hearted. 33.Wecaninferfromthesecondparagraphthatthe. A.motoristdidn'tpayanyattentiontothelanechange B.motoristwaslostinthoughtwhilehewasdriving C.motoristcutinfrontoftheauthoronpurpose D.authorforgavethemotorist 34.Whydidthemotoriststophiscaronthesideoftheroad?Because. A.hegotlostB.hiscarhadaflattire C.hewantedtohavearestD.hewantedtotravelwiththeauthor 35.Whatcanwelearnfromthetext? A.Actionsspeaklouderthanwords.B.Anactofkindnesscanmakeyoufeelgood. C.Nopainnogain.D.Itisnousecryingoverspiltmilk.
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WhenIwasinmythirdyearatuniversitymyroommateswereAmericanfootballerssoIdecidedtojointhem.Irememberseeingtheminfrontofmewearingpads防护垫andthinkingtheyweregoingtokillme.Igottackled阻截sohardthatIwasfrightened.ButthenIrealizeditwasjustphysicalcontact.I'vebeenaddictedsince. Thefundamentalaimofthegameistoscorebyrunningwiththeballintoorreceivingtheballinsidetheopposition'sendzone.Everyplayeronthefieldhasasetresponsibility.I'marunningback.MyjobisusingmyspeedstrengthandskilltocarrytheballandkeeprunninguntileitherIscoreorIgetputdown.Anditdoeshurt. I'vebrokentwofingersandhurtmyshoulderbuttheworstwaswhenItrappedtheligaments韧带inthebackofmyleg.Ihadtotakeayearout.Butnoneofthatputmeoff﹣allIcouldthinkwashowIwasgoingtocomebackstronger.BesidestrainingwiththeteamInowhavemygymroutinetogetfitterfasterandstronger. AlthoughpeoplethinkAmericanfootballisaggressivethere'smuchmoretoit.Everyteamhasitsownplaybookoutingeveryone'sroleindifferentscenes.Myplaybookwas73pageslong.Wordscan'tdescribehowitfeelswhenitallcomestogetheronthefield. Americanfootballhaschangedmylifeforthebetter.I'velearnedtimemanagementhowtotakeresponsibilityformyactionsandhowmuchItreasurebeingpartofateam.Withinthefourlinesofthefielditisphysical.Emotionsrunhigh.Ifyou'reontheopposingteamyouaremyenemy.Butoncethegameisdonewe'relikeabigfamily. 32.Theauthor'sbodypartswerehurtEXCEPT. A.hisarm B.hisshoulder C.hisleg D.hisfinger 33.Whatcanweinferfromthetext? A.Theauthorwasverydelightedwhenfirstplaying B.Theauthorhasbenefitedmorethansufferingfromthesport C.Theauthorbegantoplayatthebeginningofhisuniversitylife D.PlayingAmericanfootballisverypopularamonguniversitystudents 34.HowdoestheauthorfindhisplayingAmericanfootball? A.Relaxing B.Challenging C.Boring D.Rewarding 35.Thepassageismanlyabout. A.therulesofplayingAmericanfootball B.howpainfulitistoplaythesport C.howthesporthaschangedtheauthor'slife D.thereasonfortheauthorplayingAmericanfootball.
某型号多用电表欧姆档的电路原理图如图甲所示.微安表是欧姆表表头其满偏电流Ig=500μA内阻Rg=950Ω.电源电动势E=1.5V内阻r=1Ω.电阻箱R1和电阻箱R2的阻值调节范围均为0~9999Ω. 1甲图中的a端应与红或黑表笔连接. 2某同学将图甲中的ab端短接为使微安表满偏则应调节R1=Ω然后在ab端之间接入一电阻Rx后发现微安表半偏则接入的电阻阻值为Rx=Ω. 3如图乙所示该同学将微安表与电阻箱R2并联利用该电路图组装一个“×100倍率”的欧姆表要求欧姆表的表盘刻度示意图如图丙所示其中央刻度标“15”则该同学应调节R2=Ω用此欧姆表测量一个阻值约2000Ω的电阻测量前应调节R1=Ω.
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30分Asatemporaryteachermydailyroutine41drivingtoanewschool42everydaysoI'musuallyunabletoanticipate预料theday'seventsgoodorbad. OnoneparticulardayIwasteachinginavery43class.IwasmanagingbehaviorallthemorningandbylunchtimeIneededcoffeeto44theafternoon.Soatmylunch45Idrovetoanearbyplazatogetacupof46UponreturningtothecarIrealizedIhad47mykeysandmyphone48.Ihadabout15minutestogetbacktotheschoolwhichwasagood4﹣or﹣5minute49.Ithoughtofrushingbackbutitbeing50Ithoughtanastyfallonicewouldonlymakethesituationmuch51. SoIranintoaMcDonald'swhichwasinthe52plazaandaskedthemanatthecounterwho53tobethemanagertohelpmecallatab.I54explainedmysituationandhehurriedtothebacktousethephone55Ipacedintherestaurant. Themanagerreturned56totellmethatthecabcompanyhadputhimonholdandthenthelinegot57.Myexpressionbegantoresemblesomecombinationofhopelessnessandfear. Almostimmediatelythemanagergrabbedhiscoatand58todrivemetotheschool.Without59Ifollowedhimintohiscarandmadebackintomyclassroomwith2minutesto60beforethebell! 41.A.concludes B.involves C.relates D.connects 42.A.almost B.hardly C.really D.luckily 43.A.easy B.pleasant C.difficult D.noisy 44.A.cost B.pick C.finish D.survive 45.A.stop B.stay C.pause D.break 46.A.tea B.milk C.coffee D.wine 47.A.locked B.forgot C.threw D.shut 48.A.down B.inside C.up D.outside 49.A.distance B.drive C.walk D.time 50.A.summer B.fall C.winter D.spring 51.A.worse B.easier C.better D.simpler 52.A.other B.another C.next D.same 53.A.turned B.explained C.happened D.came 54.A.quickly B.briefly C.slowly D.hurriedly 55.A.after B.until C.when D.while 56.A.even B.only C.still D.yet 57.A.disconnected B.stuck C.troubled D.interrupted 58.A.dragged B.pulled C.offered D.pushed 59.A.problem B.choice C.alternative D.hesitation 60.A.spare B.leave C.ring D.control
1分﹣﹣Wouldyoulikesomecake? ﹣﹣I'vehadenough. A.Nothanks B.You'relucky C.It'suptoyou D.Icaneatit
如图a所示质量为M=1kg的木板静止在光滑水平面上质量为m=1kg的物块以初速度v0=2.0m/s滑上木板的左端物块与木板之间的动摩擦因数为μ=0.2在物块滑上木板的同时给木板施加一个水平向右的恒力F当恒力F取某一值时物块在木板上相对于木板滑动的路程为s给木板施加不同大小的恒力F得到﹣F的关系如图b所示当恒力F=0N时物块恰不会从木板的右端滑下.将物块视为质点最大静摩擦力等于滑动摩擦力重力加速度g取10m/s2试求 1求木板长度 2要使物块不从木板上滑下恒力F的范围 3图b中CD为直线求该段的﹣F的函数关系式.
8分We'vereachedastrange﹣somewouldsayunusual﹣point.WhilefightingworldhungercontinuestobethematterofvitalimportanceaccordingtoarecentreportfromtheWorldHealthOrganizationmorepeoplenowdiefrombeingoverweightorsayfrombeingextremelyfatthanfrombeingunderweight.It'sthegoodlifethat'smorelikelytokillusthesedays. Worsestillnearly18millionchildrenundertheageoffivearoundtheworldareestimatedtobeoverweight.What'sgoingon? Wereallydon'thavemanyexcusesforourweightproblems.Thedangersoftheproblemhavebeendrilledintousbypublic﹣healthcampaignssince2001andthemessageisgettingthrough﹣uptoapoint. Inthe1970sFinlandforexamplehadthehighestrateofheartdiseaseintheworldandbeingoverweightwasitsmaincause.Notanymore.Apublic﹣healthcampaignhasgreatlyreducedthenumberofheartdiseasedeathsby80percentoverthepastthreedecades. MaybethatexplainswhythepercentageofpeopleinFinlandtakingdietpillsdoubledbetween2001and2005anddoctorsevenoffersurgeryofremovingfatinsideandchangetheshapeofthebody.Thathasbecomeasortoffashion.Nowonderitranksastheworld'smostbody﹣consciouscountry. Weknowwhatweshouldbedoingtoloseweight﹣butactuallydoingitisanothermatter.Byfarthemostpopularexcuseisnottakingenoughexercise.Morethanhalfofusadmitwelackwillpower.Othersblamegoodfood.Theysayit'sjusttooinvitinganditmakesthemovereat.StillotherslaytheblameontheAmericanscomplainingthatpoundshavepiledonthankstoeatingtoomuchAmerican﹣stylefastfood. Somealsoblametheirparents﹣theirgenes.Butunfortunatelytheparentsarewrongedbecausethey'renormalinshapeorratherslim. It'sasimilarstoryaroundtheworldalthoughpeoplearerelativelyunlikelytohavetriedtoloseweight.Parentsareeagertoseetheirkidsshapeup.DoasIsay﹣notasIdo. 24.What'sthestrangepointmentionedinthefirstsentence? A.Thegoodlifeisagreaterriskthanthebadlife. B.Starvationistakingmorepeople'slivesintheworld. C.WHOreportshowspeople'sunawarenessoffoodsafety. D.OverweightissueremainsunresolveddespiteWHO'sefforts. 25.Whydoestheauthorthinkthatpeoplehavenoexcuseforbeingoverweight? A.Alotofeffectivedietpillsareavailable. B.Bodyimagehasnothingtodowithgoodfood. C.Theyhavebeenmadefullyawareofitsdangers. D.Therearetoomanyoverweightpeopleintheworld. 26.TheexampleofFinlandisusedtoillustrate. A.thecauseofheartdisease B.therearetoomanyoverweightpeopleintheworld C.theeffectivenessofacampaign D.thefashionofbodyshaping 27.Whichwouldbethebesttitleforthepassage? A.ActionsorExcusesB.OverweightorUnderweight C.WHOinaDilemmaD.NoLongerDyingofHunger.
Howdoyoupayforgoodsinashop?Perhapsyoulikethetruereliabilityofhardcash?Perhapsthefinancialflexibilityofacreditcardsuitsyoubetter? 36 Whateveryouuseourbodiesoureyesourfingerprintsevenourmerepresenceinthestore.37Amazonarehavingatrialonstoreswhichhavenocheckoutswheretechnologytrackstheitemsyou'vetakenfromtheshelvesanddeducts扣除thetotalfromyouraccountwhenyouleavetheshop. FrenchsupermarketMonoprixtakesadifferentpathyouchooseyourgroceriesandleavethemwithahumancashier.Youthenleavetheshopwhilethecashiersettlesyourbillchargesyouraccountandorganizesdeliverytoyourhome.38What'smorewearableitemssuchasringsbraceletsandkeychainswillcarrychipsthatallowshopperstorandomlyshopgoingbetweenthewebanapporinstore. 39Perhapssomethingtotallynewwilltakeoffthatchangesmoneyasweknow.OnesuchpossibilityisexploredinthemovieInTimewhichimaginesafuturesocietyinwhichmoneyistimeitselfwherepeopletradetheamountoftimetheyhavelefttolive.Orperhapswewouldgobacktothesimplerfinancialworldoftheoriginaleconomy.Inthiscaseweneedn'tusemoneywhiletrading.Itseemsasiftheimagesofsacksofgrainandherdsofsheepbeingexchangedinancienttimescamebacktolifewiththehelpofmoderntechnology.40Doyouthinkso? A.Alltheseshoppingmethodsareconvenientforcustomers. B.Buttheonlythingweknowforcertainisthatmoneywillkeepchanging. C.Whoknowswhatwillhappentomoneyinthefuture? D.Itiscertainthattradewilldisappearinthefuture. E.Orperhapsyoupreferthesimpleconvenienceofasmartphone? F.Thisnewdevelopmentmeanstheendoftheplasticcreditcard. G.Infactit'shappeningalready.
1分ImustrememberChristmascardstoallthoseIforgotlastyear. A.sending B.havingsent C.tosend D.tobesent
假定你是李华上个月你从外教Mr.Brown那里借了一本海明威Hemingway的小说老人与海TheOldManandtheSea但不慎将书丢失.为此请你给Mr.Brown写一封道歉信.信的内容包括 1道歉 2说明丢失原因 3提出补救措施 注意 1词数100左右 2可适当增加细节以使行文连贯. DearMr.Brown I'mwritingthislettertomakeanapologytoyoufor.
如图所示A和B为竖直放置的平行金属板在两极板间用绝缘线悬挂一带电小球.开始时开关S闭合且滑动变阻器的滑动触头P在a处此时绝缘线向右偏离竖直方向电源的内阻不能忽略则下列判断正确的是
Forthousandsofyearspeoplehavesailedacrosstheoceanstotradeexploreandtransportgoods.Howevernoteveryshiparrivesatitsportofdestination.Weatherwarnavigationmistakesandbadluckhavecausedmanyshipstosinktothebottomoftheocean.Theseshipwreckswhichareestimatedtonumbermorethanthreemillionhavelongfascinatedus.Inadditiontobeinghistoricallyimportanttheysometimescontaingreatriches.Historicalresearchisakeymotivatorforshipwreckhunters.Shipscarryingdocumentsandartifactcanteachusaboutancientcivilizationsandimportantevents.Forinstancein1997thePandorawhichsankin791wasdiscoveredoffthecoastofAustralia.Thefindingsfromtheshiphelpedusunderstandtheeventssurroundingthefamousmutiny暴动onanothership﹣﹣﹣﹣﹣theBounty.AnotherimportantdiscoveryofftheUScoastin1996iswidelybelievedtobetheQueenAnn'sRevengetheflagshipoftheprivateBlackbeard.Profitisanothermotiveforshipwreckexplorationascompaniesuseadvancedsonarrobotsandretrievalequipmenttofindtreasureships.OnesuchfirmisOdysseyMarineExploration.Thecompanyhasfoundhundredsofshipsincludingin2007aSpanishsailingshipcontaining500000silvercoins.Theshipwhichsank200yearsagointheAtlanticOceancarriedatreasureestimatedtobeworth$500million.SoonafterthediscoveryalonglegalbattleoverownershiprightstookplacebetweenthecompanyandtheSpanishgovernment.Caseslikethesearepartofanongoingdebateaboutprotectinghistoricallyimportantshipsfromtreasurehunters.
GoodChoice!ToVisitCanadain2017 Whetheryou´reanadventureseekercultureloverorjustoverallcurioustravelerthisyearCanadawillappealtoyouwiththeusualamountofhospitalityenthusiasmandpride. TocelebrateCanada´s150thbirthdaythegovernmentdepartmentisgivingpeoplethegiftofexperiencetheopportunitytovisitalltheDiscoveryPass.ThispreferentialtermwillbevalidformMay202017untilOctober222017.Thoughthereareplentyofsplendidsceneryforyoutotourherearetwositesyoucannotavoidvisiting. *CanadianRockyMountainParks InthisareaknowtotheworldastheCanadianRockyMountaintherearefivenationalparksBanffNationalPark.ThesespectacularsitesweredeclaredaUNESCOWordHeritageSiteunderthenameCanadianRockyMountainParks.Youcanenjoywatchingwildanimalsandtakingpartinoutdooractivitieslikemountainbikinghikingfishinginthesummeraswellasskiingsnowboardingsnowshoeingandsleddinginwinter. TheusualDiscoveryPasspriceforRockyMountainParks PerAdult$60 Perchildunder16free Ticketsareavailableeitheronlineorattheattraction *NiagaraFallsStatePark ExperiencethepowerofNiagarafallsclosewhenyouridetheworldfamousMaidoftheMistMoattourorstandendertheBridalVeilFallsintheCaveoftheWinds.Eventhoughtheparkisopen365daysayeartheopeningofourattractionsisbasedoniceconditionsintheNiagaraRiver.SothebesttourtimetovisitNiagaraFallsissummerwhenithasthemosttremendouspower.DoitallwithaNiagaraFallsDiscoveryPassandmakememoriesthatwilllastalifetime! TheusualDiscoveryPassPriceforNiagaraFalls Adultabove16yearsold$40 Child6﹣16yearsold$30 NiagaraFallsoffersFREEadmissiontoalltheattractionstochildrenunder5 BuyyourDiscoveryPassonlineorattheattractions 21.WhatgiftwillCanadiangovernmentgivetothetouristsin2017? A.FreeAdmissionsforallthefamousattractions. B.AfreeDiscoveryPassforeachluckytourist. C.OfferingtastyCanadianfoodforfree. D.VisitingthefamousCanadianattractionsathalfprice. 22.IfyouvisitRockyMountainParksinJulywhattouristactivityyoucannottakeparting? A.Hiking B.Fishing C.Dogsledding D.Watchingwildanimals 23.ThebestseasontovisitNiagaraFallsissummermainlybecause. A.youcanridetheMistBoat B.theparkisopenonlyinthisseason C.thereisiceintheriver D.theFallhasthemosttremendouspower 24.Howmuchwillacouplewithafive﹣year﹣oldsonspendatleastiftheyvisitbothtowattractions? A.$100 B.$200 C.$260 D.$300.
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.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. Lilyisagoodfriendofme.SheisanexchangestudentfromAmericathathasbeenstudyinginChinaforoneandahalfmonth.InordertomakefulluseofhershortstayhereLilyworkshardly.BecauseshehadnotstudiedanyChinesebeforecomingsoshehasmuchtroublecommunicatingwiththelocalpeople.Shegotupearlyinthemorningtostudyafterclass.SheissoindependentwhilelivefarfromherfamilyandquitehelpfultoourChinese.HoweverbusysheisshewouldrathertakehertimehelpuswithourEnglish.
如图所示两根相距L=0.8m电阻不计的平行光滑金属导轨水平放置一端与阻值R=0.3Ω的电阻相连导轨x>0一侧存在沿x方向均匀增大的稳恒磁场其方向与导轨平面垂直变化率k=0.5T/mx=0处磁场的磁感应强度B0=0.5T一根质量m=0.2kg电阻r=0.1Ω的金属棒置于导轨上并与导轨垂直棒在外力作用下从x=0处以初速度v0=4m/s沿导轨向右运动运动过程中电阻消耗的功率不变则
Ifyouhaveeverhadacatorhavewatchedoneofthemanyfunnycatvideosonlineyou'llknowthatcatshaveamindoftheirown.Alotofthethingstheydoarehardtounderstand﹣﹣﹣theyliketoclimbuptallfurniturefitthemselvesinsmallspacesandattacksmallobjectsfornoreasonatall. Nowscientistshavemanagedtofigureoutwhatexactlyisgoingoninthebrainsofourlittlefriends.AccordingtoTonyBuffingtonaprofessoratOhioStateUniversityintheUScats'strangebehaviorlargelycomesfromtheirwayoflifebackinthewild.Catstodaystillhavemanyofthesameinstincts本能thatallowedthemtoliveinthewildformillionsofyears.hesaidinaTEDTalk.Tothemourhomesaretheirjungles. Inthewildcatsarehunters.Theirbodiesandgreatbalancingabilitiesallowthemtoclimbtohighspotstobetterlookattheenvironment.Eventhoughtheydon'thavetohuntanymoreinhumanhousestheystillkeeptheoldhabitofviewingthelivingroomfromforexamplethetopoftherefrigerator. Cats'huntinginstinctisalsowhatmakesthemattacksmallthingslikekeysandUSBdrives.Inthewildtheyhuntwhatevertheycangetandmostoftheanimalstheykillaresmall. Howevercatscanalsobeprey.Thisexplainswhytheyliketostayinsmallspaceslikedrawersorwashingmachines﹣﹣﹣theyarehidingortheythinktheyarehidingfrommoredangerousanimals.Thisisalsowhycatspreferacleanboxasmellyonecouldeasilyshowenemieswheretheyare. Knowinghowcats'mindsworkisnotonlyusefulforbetterunderstandingthem.Itmayalsohelpcats'ownerstobettermeetcats'needs.Forexampleownerscouldtrytomakeclimbingeasierforcatsbymovingtheirfurniturearound.Theycouldalsousefoodpuzzlestomakeeatingfeelmorelikehuntinginsteadofjustgivingfoodtothecats. 24.AccordingtoTonyBuffington. A.cats'strangebehaviorishardforpeopletounderstand B.catsaremoreusedtolivinginthewildthaninhumans'homes C.catsbehavestrangelymainlybecauseofsomeinstinctsinthewild D.cats'instinctsareashelpfultothemtodayastheyweremillionsofyearago 25.WhichofthefollowingstatementsisTRUEaccordingtothetext? A.Catsliketoclimbuphighbecausetheywanttohidefromdangerousanimals B.CatsattackkeysandUSBdrivesbecausetheyhaveahabitofhuntingsmallanimals C.Catsenjoystayinginsmallspacesbecausetheyusuallyliveinsmallcavesinthewild D.Cats'preferenceforacleanboxprobablyhassomethingtodowiththeirhuntinginstincts 26.TheunderlinedwordpreyinParagraph5probablymeans. A.ananimalthatistoolazy B.ananimalthatlikeshidinggames C.ananimalthatkeepsitselfclean D.ananimalthatishunted 27.Thisarticleismainlywrittento. A.explorethereasonsbehindcats'strangebehavior B.describecats'pastwildexperiencetoreaders C.tellcatownershowtomakelifeeasierforcats D.comparecats'behaviorinhumanhomeswiththatinthewild.
10分下面短文中有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. AcenturybeforeabirdcalledthepassengerpigeonlivedinNorthAmerica.Thereweresomanypassengerpigeonswhenpeopleoftensawthousandsevenmillionsofbirdsflyingoverhead.Thereforethereisnotasingleonelefttoday.Whathappened?Howdidallpassengerpigeonsdisappearfromtheearthentire? Thepassengerpigeonsbecomeextinctfortworeason.Firsttheforeststhatitlivedwascutdowntomakewaywithfarmsandcities.Secondmanypigeonswereshotandeatenbecausetheyweretoogoodtoeat.Atthattimetherewerenohuntinglawsprotectendangeredspeciesastheyarenow.
如图甲所示轻弹簧竖直放置下端固定在水平地面上一质量为m的小球从离弹簧上端高h处由静止释放.某同学在研究小球落到弹簧上后继续向下运动到最低点的过程他以小球开始下落的位置为原点沿竖直向下方向建立坐标轴Ox做出小球所受弹力F大小随小球下落的位置坐标x的变化关系如图乙所示不计空气阻力重力加速度为g.以下判断正确的是
如图所示为一个透明介质做成的直角三角柱的微截面其中∠A=30°∠B=90°一细光束平行于AC边从AB边的O点入射到该介质经AB边折射后直接照射在BC边上为使光束能从BC边射出三角柱求该透明介质材料折射率的范围.
1分Itwasearlyspringandthetreeswerejuststartingtotheirleaves. A.giveout B.turnout C.putout D.sendout
如图所示圆弧轨道AB被竖直固定其下端点B的切线水平.现将可视为质点的质量为m=1kg的小球从A点由静止释放小球从B点冲出后最终打在右方的竖直墙上的C点未画出在C点的速度方向与水平方向夹角为37°已知B端与墙壁的水平距离为l=0.3m不计一切摩擦和阻力g=10m/s2则下列说法正确的是
Onewaypeoplearerespondingtofoodsafetyconcernsisbygrowingtheirownfood.Howevernoteveryonelivesonpropertywithenoughspaceforaprivateplot.Onesolutioniscommunitygardenswhichhavebecomepopularworldwidenumbering18000inNorthAmericaalone.Inadditiontoprovidinglow﹣costdeliciousfoodthesepublicspacesoffercitiesarangeofotherbenefits. Communitygardensarelocatedinatownorcityandtendedbylocalresidents.Oftenthelandisonavacantlotownedbythecity.Thesiteisdividedintomanageableplotswhichmaybetendedbyindividualsorbythegarden'smemberscollectively.Sincethelandisusuallypubliclyownedthecostforgardenerstoleaseitisminimal.InfactNewYorkCitywhichishometomorethan750communitygardenstendedbymorethan20000memberschargespeoplejust$1ayeartoleaseaplot.Othercostsinvolvesoiltoolsseedsfencingandsoon.Howeverbecausethey'resharedbymanypeopleindividualgardenerspayverylittle. Acommunitygardencanquicklypayoffintermsofdeliciousfruitsandvegetablesinadditiontobeautifulflowers.Excessproducecanbesoldforaprofitatfarmersmarkets.Butagarden'sbenefitdon'tstopthere.Theyalsobeautifycitiesfosterstrongrelationshipsamongresidentsandloweranarea'scrimerate.Award﹣winningspaceslikeLondon'sCulpeperCommunityGardenevenattracttourists.Beautifulandaffordablecommunitygardensareoftendescribedasoasesincrowdedcities. 56.Communitygardensaredesignedforthosewho. A.areconcernedaboutfoodsafety B.liveinahousewithaprivateplot C.can'taffordtobuyorganicfood D.don'thavetheirownproperty 57.NewYorkCity. A.isownedby20000individualgardeners B.chargesresidentsalottoleasetoolsandfencing C.containsmorethan750communitygardens D.istendedbyprofessionalgardenersandlocalresidents 58.What'sthebenefitofcommunitygardens? A.Peoplecanenjoysafeanddeliciousvegetablesandanimalmeat. B.Residentsaremorefamiliarandrelatedwitheachother. C.Theneighborhoodisbecomingsaferbutoflowertaste. D.Peoplecanmakesomeprofitsfromthevisitingtourists. 59.Theunderlinedwordoasesisclosestinmeaningto. A.culturalandartcenters B.popularplatformsforexchanges C.peacefulandsafelands D.commercialandprosperousplaces.
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