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如图所示，质量为M＝2kg的木板A静止在光滑水平面上，其左端与固定台阶相距x，右端与一固定在地面上的半径R＝0.4m的光滑四分之一圆弧紧靠在一起，圆弧的底端与木板上表面水平相切．质量为m＝1kg的滑...
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高三下学期物理《》真题及答案
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如图甲所示一质量为M.的长木板静置于光滑水平面上其上放置一质量为m的小滑块.木板受到随时间t变化的水
滑块的质量m＝4 kg
木板的质量M.＝2kg
当F.＝8 N.时滑块加速度为2 m/s
2
滑块与木板间动摩擦因数为0.1
如图所示甲车的质量是2kg静止在光滑水平面上上表面光滑右端放一个质量为1kg的小物体.乙车质量为4k
质量为2kg的物体静止于光滑水平面上现受到一水平力F.的作用开始运动.力F.随位移s变化如图所示.则
如图所示质量为m1=2kg的木板A放在水平面上木板与水平面间的动摩擦因数为μ1=0.1木板在F=7N
质量为M=2kg的__板车C.静止在光滑水平面上车的一端静止着质量为mA.=2kg的物体A.可视为质
如图所示质量为2kg的物体A以4.0m/s的速度在光滑水平面上自右向左运动一颗质量为20g的子弹以5
如图所示质量分别为2kg3kg的物体A.B.叠放在光滑水平面上B.物体在大小为6N方向水平向右拉力的
如图所示质量为M.=2kg的足够长的__板车静止在光滑水平面上车的一端静止着质量为MA=2kg的物体
如图所示质量为3kg的木板放在光滑水平面上质量为1kg的物块在木板上它们之间有摩擦木板足够长两者都以
如图所示光滑水平面上放置一质量为mA=1kg的木板
，其上有一质量为m
B
=2kg的物体
，A.B.之间摩擦因数为0.3，现将一水平拉力F.=9N作用于B.物体上，则下列说法正确的是A.A.B.之间会发生相对滑动B.B.的加速度大小为1.5m/s
2
A.受到的摩擦力为3N
B.受到的摩擦力为6N
如图所示质量为2kg的木板B.静止在光滑水平面上质量为1kg可视为质点的木块A.以水平速度v0=2m
如图所示平放在水平面上的轻质弹簧的一端固定在竖直墙上质量为m1的光滑弧形槽静止在光滑水平面上底部与水
质量为M=2kg的__板车C.静止在光滑水平面上车的一端静止着质量为mA.=2kg的物体A.可视为质
如图所示一质量为M长为L的木板固定在光滑水平面上一质量为m的小滑块以水平速度v0从木板的左端开始滑动
一块足够长的木块放置在光滑水平面上木板质量M=2kg木板左端有一质量m=1kg的物块物块与木板开始都
如图所示一质量为M.长为L.的木板固定在光滑水平面上一质量为m的小滑块以水平速度v0从木板的左端开始
如图所示一质最为M.的长木板静板置于光滑水平面上其上放置质量为m的小滑块木板受到随时间t变化的水平拉
滑块的质量m=4kg
木板的质量 M=6kg
当F.=8N时滑块加速度为2 m/s2
滑块与木板间动摩擦因数为0.1
光滑水平面上足够长的木板质量M=8kg由静止开始在水平恒力F.=8N作用下向右运动如图所示当速度达到
如图所示长为L=2m的木板A.质量为M=2kgA.静止于足够长的光滑水平面上小物块B.可视为质点静止
如图所示长为L=2m的木板A.质量为M=2kgA.静止于足够长的光滑水平面上小物块B.可视为质点静止
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Muchoftheworkintoday'sworldisaccomplished完成inteams.Mostpeoplebelievethebestwaytobuildagreatteamistogatheragroupofthemosttalentedindividuals.1Companiesspendmillionshiringtopbusinesspeople.Istheirmoneywellspent? 2Theyfocusedonfootballbasketballandbaseball.Theresultsaremixed.Forfootballandbasketballaddingtalentedplayerstoateamprovesagoodmethodbutonlyuptothepointwhere70%oftheplayersaretoptalent;abovethatleveltheteam'sperformancebeginstodecline.Interestinglythistrendisn'tevidentinbaseballwhereadditionalindividualtalentkeepsimprovingtheteam'sperformance. Toexplaintinsphenomenontheresearchersexploredthedegreetowhichagoodperformancebyateamrequiresitsmemberstocoordinate协调theiractions.3Inbaseballtheperformanceofindividualplayersislessdependentonteammates.Theyconcludethatwhentaskinterdependenceishighteamperformancewillsufferwhenthereistoomuchtalentwhileindividualtalentwillhavepositiveeffectsonteamperformancewhentaskinterdependenceislower.Ifabasketballstarisforexampletryingtogainahighpersonalpointtotalhemaytakeashothimselfwhenitwouldbebettertopasstheballtoateammateaffectingtheteam'sperformance.YoungchildrenlearningtoplayteamsportsareoftentoldThereisnoIinTEAM.4 Anotherpossibilityisthatwhenthereisalotoftalentonateamsomeplayersmaymakelesseffort.Justasinagameoftug﹣of﹣war拔河比赛wheneverapersonisaddedeveryoneelsepullstheropewithlessforce. 5AnA﹣teammayrequireabalance﹣notjustAplayersbutafewgenerousBplayersaswell. A.It'snotasimplemattertodeterminethenatureoftalent. B.Sportsteamownersspendmillionsofdollarsattractingtoptalent. C.Thegroupinteractionanditseffectdrewtheresearchers'attention. D.Starsapparentlydonotfollowthisbasicprincipleofsportsmanship. E.Severalrecentstudiesexaminedtheroleoftalentinthesportsworld. F.Buildingupadreamteamismorecomplexthansmiplyhiringthebesttalent. G.Thistaskinterdependencedistinguishesbaseballfromfootballandbasketball.
A OnthefirstdayofmyfirstgradeIstoodbythedoorwithbutterfliesinmystomach.I1voicemybiggestconcerntomymotherHowwillImakefriends?ShehandedmeadviceBeyourself.Forthepast20yearsIhavelivedbythesewords.SoonIwillgraduateandbecomepartoftherealworld.Nervously2facechallengesIknowIwillwhisperto3IthetwosimplewordsBeyourself. B EarthDay4markon22Aprilisanannualeventaimingtoraisepublicawarenessaboutenvironmentalprotection.Firstcelebrated51970theDaynowincludeseventsinmorethan190countriesandregions地区.Nomatterwhatyouliketodothereisawaytogetinvolvedinvarious6activityonEarthDay.Youcanplantatreemakeamealwithlocallygrownvegetablesorsavepower﹣thepossibilitiesareendless. C Doesthenameofthecollegeyouattendreallymatter?Researchonthequestion7suggestthatformoststudentsitdoesn't.Whatstudentsdoatcollegeseemstomattermuchmorethan8theygo.Thestudentsbenefittingmostfromcollegearethose9aretotallyengaged参与inacademiclifetakingfulladvantageofthecollege'schancesandresources资源.Studentsshouldhaveaproperattitudetowardscollegebeforethinkingaboutwhichcollegetoattendandit'snevertooearlytomakenecessarypreparationsforahealthyand10meaningcollegeexperience.
Duringtherosyyearsofelementaryschool小学Ienjoyedsharingmydollsandjokeswhichallowedmetokeepmyhighsocialstatus.Iwasthequeenoftheplayground.Thencamemytweensandteensandmeangirlsandcoolkids.TheyroseintheranksnotbybeingfriendlybutbysmokingcigarettesbreakingrulesandplayingjokesonothersamongwhomIsoonfoundmyself. Popularityisawell﹣exploredsubjectinsocialpsychology.MitchPrinsteinaprofessorofclinicalpsychologysortsthepopularintotwocategories:thelikableandthestatusseekers.Thelikables'plays﹣well﹣with﹣othersqualitiesstrengthenschoolyardfriendshipsjump﹣startinterpersonalskillsandwhentappedearlyareemployedeverafterinlifeandwork.Thenthere'sthekindofpopularitythatappearsinadolescence:statusbornofpowerandevendishonorablebehavior. EnviableasthecoolkidsmayhaveseemedDr.Prinstein'sstudiesshowunpleasantconsequences.Thosewhowerehighestinstatusinhighschoolaswellasthoseleastlikedinelementaryschoolaremostlikelytoengage从事indangerousandriskybehavior. InonestudyDr.Prinsteinexaminedthetwotypesofpopularityin235adolescentsscoringtheleastlikedthemostlikedandthehighestinstatusbasedonstudentsurveys调查研究.Wefoundthattheleastwell﹣likedteenshadbecomemoreaggressiveovertimetowardtheirclassmates.Butsohadthosewhowerehighinstatus.Itclearlyshowedthatwhilelikabilitycanleadtohealthyadjustmenthighstatushasjusttheoppositeeffectonus. Dr.Prinsteinhasalsofoundthatthequalitiesthatmadetheneighborswantyouonaplaydate﹣sharingkindnessopenness﹣carryovertolateryearsandmakeyoubetterabletorelateandconnectwithothers. InanalyzinghisandotherresearchDr.Prinsteincametoanotherconclusion:Notonlyislikabilityrelatedtopositivelifeoutcomesbutitisalsoresponsibleforthoseoutcomestoo.Beinglikedcreatesopportunitiesforlearningandfornewkindsoflifeexperiencesthathelpsomebodygainanadvantagehesaid. 1Whatsortofgirlwastheauthorinherearlyyearsofelementaryschool? A.Unkind. B.Lonely. C.Generous. D.Cool. 2Whatisthesecondparagraphmainlyabout? A.Theclassificationofthepopular. B.Thecharacteristicsofadolescents. C.Theimportanceofinterpersonalskills. D.Thecausesofdishonorablebehavior. 3WhatdidDr.Prinstein'sstudyfindaboutthemostlikedkids? A.Theyappearedtobeaggressive. B.Theytendedtobemoreadaptable. C.Theyenjoyedthehigheststatus. D.Theyperformedwellacademically. 4Whatisthebesttitleforthetext? A.BeNice﹣YouWon'tFinishLast B.TheHighertheStatustheBetter C.BetheBest﹣YouCanMakeIt D.MoreSelf﹣ControlLessAggressiveness
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设xy满足约束条件则z＝2x+y的最大值为．
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＝
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Everyyearabout40000peopleattempttoclimbKilimanjarothehighestmountaininAfrica.They1withthemlotsofwaste.The2mightdamagethebeautyoftheplace.Theglaciers冰川aredisappearingchangingthe3ofKilimanjaro. HearingthesestoriesI'm4abouttheplace﹣otherdestinationsaredescribedaspurernaturalexperiences. HoweverIsoon5thatmuchhaschangedsincethedaysofdisturbingreportsof6amongtonsofrubbish.Ifinda7mountainwithtoiletsatcampsandalongthepaths.Theenvironmentalchallengesare8buttheeffortsmadebytheTanzaniaNationalParkAuthorityseemtobe9. ThebestofaKilimanjaro10inmyopinionisn'treachingthetop.Mountainsare11asspiritualplacesbymanycultures.This12isespeciallyevidentonKilimanjaroas13gothroughfiveecosystems生态系统inthespaceofafewkilometers.Atthebaseisarainforest.Itendsabruptlyat3000meters14landsoflowgrowingplants.Furtheruptheweather15﹣lowcloudsenvelopethemountainsideswhicharecoveredwiththickgrass.I16twelveshadesofgreenfromwhereIstand.Above4000metersisthehighland17:gravel砾石stonesandrocks.18youclimbintoanarctic﹣likezonewith19snowandtheglaciersthatmaysoondisappear. DoesKilimanjaro20itsreputationasacrowdedmountainwithlinesoftouristsruiningtheatmosphereofpeace?Ifoundtheoppositetobetrue. 1A.keep B.mix C.connect D.bring 2A.stories B.buildings C.crowds D.reporters 3A.position B.age C.face D.name 4A.silent B.skeptical C.serious D.crazy 5A.discover B.argue C.decide D.advocate 6A.equipment B.grass C.camps D.stones 7A.remote B.quiet C.all D.clean 8A.new B.special C.significant D.necessary 9A.payingoff B.spreadingout C.blowingup D.fadingaway 10A.atmosphere B.experience C.experiment D.sight 11A.studied B.observed C.explored D.regarded 12A.view B.quality C.reason D.purpose 13A.scientists B.climbers C.locals D.officials 14A.holdingonto B.goingbackto C.livingupto D.givingwayto 15A.changes B.clears C.improves D.permits 16A.match B.imagine C.count D.add 17A.village B.desert C.road D.lake 18A.Obviously B.Easily C.Consequently D.Finally 19A.permanent B.little C.fresh D.artificial 20A.enjoy B.deserve C.save D.acquire
ThingstoDoonaSunnyDayinSanFrancisco SanFranciscodoesn'ttakeitssunnydaysforgranted.Oncethesuncomesoutandthetemperaturesriseeveryoneracestoseizeaspottotakeinanunbelievablecityvieworheadstooneoftheirfavoriteattractions. FindThrillsataThemePark ExperiencethrillridesandattractionsatSixFlagsDiscoveryKingdomNorthAmerica'sonlythemeparkofwildlifesealifeandthrillingrides.It'sawonderfulentertainmentexperienceforthewholefamilywithone﹣of﹣a﹣kindadventuresacrossthreeworlds. Cruise乘船游览ontheBay SailunderoneoftheModernWondersoftheWorld.Watchsealionsandsealsatplay. AndlearnallthesecretsofthefantasticcitybytheBay.ForpeoplewholikethethrillofspeedandwindintheirhairtheseasonalRocketBoatMay﹣Octoberistheoptionforyou. TourAT&TPark It'shometothefamousbaseballteamSanFranciscoGiantsfromApriltoOctobereveryyearbutyoucantakeatourinsideAT&TParkanytimeforaplayer'seyeview.You'llhaveaccesstothebaseballfieldthevisitors'clubhousethepressboxandsoon. RideaBikeovertheGoldenGateBridge Explorethebeautifulbike﹣friendlystreetsandwaterfrontpathsofSanFranciscoallthewaytotheGoldenGateBridgewithanall﹣daybikerentalfromBlazingSaddles.Theireasy﹣ridebikescombinedwiththeirnewfreemobileappfullofhelpfultipsandsightseeingsuggestionsmaketheself﹣guidedtourseasyandfunforeveryone. 1WhatcantouristsdoatSixFlagsDiscoveryKingdom? A.Experiencethrillingrides. B.LearnallthesecretsofSanFrancisco. C.Takeaplayer'seyeviewoverapark. D.AdmirethesceneryoftheGoldenGateBridge. 2Whicheventattractstouristslovingspeedandwindmost? A.FindThrillsataThemepark B.CruiseontheBay C.TourAt&TPark D.RideaBikeovertheGoldenGateBridge 3Whichofthefollowingofferstouristsafreemobileapp? A.Watchingwildlife. B.Sailingonthebay. C.Visitingabaseballfield. D.RentingabikefromBlazingSaddles.
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设Sn为等差数列{an}的前n项和若S2+S4＝2S3+S5a1＝9则公差d＝
直线l过点10且斜率为2则l的方程是
假定你是李华你校拟组织美国交换生Chris等到泉州府文庙去参观请你写封邮件告知他活动安排.内容包括: 1.集合时间和地点; 2.内容;参观府文庙间南古建筑观看木偶戏; 3.预先准备:简要了解孔子文化. 注意: 1.可适当发挥使短文连贯通顺; 2.文中不能出现考生的具体信息; 3.词数:100左右. 参考词汇:1.府文庙theConfuciusTemple2.木偶戏puppetshow DearChris
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在直角坐标系xOy中直线y＝kx﹣2与抛物线Cx2＝﹣y相交于AB两点． 1证明为定值． 2若点M的坐标为32且|MA|＝|MB|证明．
已知曲线y＝ex+x2﹣ax在区间01内存在垂直于y轴的切线则a的取值范围为
Theproblemofrobocallshasgottensobadthatmanypeoplenowrefusetopickupcallsfromnumberstheydon'tknow.Bynextyearhalfofthecallswereceivewillbescams欺诈.Wearefinallywakinguptotheseverityoftheproblembysupportinganddevelopingagroupoftoolsappsandapproachesintendedtopreventscammersfromgettingthrough.Unfortunatelyit'stoolittletoolate.Bythetimethesesolutions解决方案becomewidelyavailablescammerswillhavemovedontocleverermeans.Inthenearfuture.it'snotjustgoingtobethenumberyouseeonyourscreenthatwillbeindoubt.Soonyouwillalsoquestionwhetherthevoiceyou'rehearingisactuallyreal. That'sbecausethereareanumberofpowerfulvoicemanipulation处理andautomationtechnologiesthatareabouttobecomewidelyavailableforanyonetouse.Atthisyear'sI/OConferenceacompanyshowedanewvoicetechnologyabletoproducesuchaconvincinghuman﹣soundingvoicethatitwasabletospeaktoareceptionistandbookareservationwithoutdetection. Thesedevelopmentsarelikelytomakeourcurrentproblemwithrobocallsmuchworse.Thereasonthatrobocallsareaheadachehaslesstodowithamountthanprecision.Adecadeofdatabreaches数据入侵ofpersonalinformationhasledtoasituationwherescammerscaneasilylearnyourmother'snameandfarmore.Armedwiththisknowledgethey'reabletocarryoutindividuallytargetedcampaignstocheatpeople.Thismeansforexamplethatascammercouldcallyoufromwhatlookstobeafamiliarnumberandtalktoyouusingavoicethatsoundsexactlylikeyourbankteller'strickingyouintoconfirmingyouraddressmother'snameandcardnumber.Scammersfollowmoneysocompanieswillbetheworsthit.Alotofbusinessisstilldoneoverthephoneandmuchofitisbasedontrustandexistingrelationships.Voicemanipulationtechnologiesmayweakenthatgradually. Weneedtodealwiththeinsecurenatureofourtelecomnetworks.Phonecarriersandconsumersneedtoworktogethertofindwaysofdeterminingandcommunicatingwhatisreal.Thatmightmeaneitherdevelopingauniformwaytomarkvideosandimagesshowingwhenandwhotheyweremadebyorabandoningphonecallsaltogetherandmovingtowardsdata﹣basedcommunications﹣usinglikeFaceTimeorWhatsAppwhichcanhetiedtoyouridentity. Credibilityishardtoearnbuteasytoloseandtheproblemisonlygoingtogetharderfromhereonout. 1Howdoestheauthorfeelaboutthesolutionstotheproblemofrobocalls? A.Panicked. B.Confused. C.Embarrassed. D.Disappointed. 2Takingadvantageofthenewtechnologiesscammerscan. A.aimatvictimsprecisely B.damagedatabaseseasily C.startcampaignsrapidly D.spreadinformationwidely 3Whatdoesthepassageimply? A.Honestyisthebestpolicy. B.Technologiescanbedouble﹣edged. C.Therearemoresolutionsthanproblems. D.Credibilityholdsthekeytodevelopment. 4Whichofthefollowingwouldbethebesttitleforthepassage? A.WheretheProblemofRobocallsIsRooted B.WhoIstoBlamefortheProblemofRobocalls C.WhyRobocallsAreAbouttoGetMoreDangerous D.HowRobocallsAreAffectingtheWorldofTechnology
Wanttoexplorenewculturesmeetnewpeopleanddosomethingworthwhileatthesametime?YoucandoallthethreewithGlobalDevelopmentAssociationGDA.Whateverstageoflifeyou'reatwhereveryougoandwhateverprojectyoudoinGDAyou'llcreatepositivechangesinapoorandremotecommunity社区. Weworkwithvolunteersofallagesandbackgrounds.Mostofourvolunteersareaged17﹣24.Nowweneedvolunteermanagersaged25﹣75.Theyareextremelyimportantinthesafeandeffectiverunningofourprogrammes.Wehavesuchrolesasprojectmanagersmountainleadersandcommunicationofficers. Dependingonwhichroleyouchooseyoucouldhelptoincreaseacommunity'saccesstosafedrinkingwaterorhelptoprotectvaluablelocalcultures.Youmightalsodesignanadventurechallengetotrainyoungvolunteers. Notonlywillyouhelpouryoungvolunteerstodeveloppersonallyyou'llalsolearnnewskillsandincreaseyourculturalawareness.Youmayhavechancestomeetnewpeoplewho'llbecomeyourlifelongfriends. Thissummerwehaveboth4﹣weekand7﹣weekprogrammes: GDAensuresthatvolunteersworkwithcommunitymembersandlocalprojectpartnerswhereourhelpisneeded.Allourprojectsaimtopromotethedevelopmentofpoorandremotecommunities. ThereisnootherchancelikeaGDAprogramme.Joinusasavolunteermanagertodevelopyourownskillswhilebringingbenefitstothecommunities. FindoutmoreaboutjoiningaGDAprogramme: Website:www.glodeve.org Email:humanresources@glodeve.org 1Whatisthemainresponsibilityofvolunteermanagers? A.Toseeklocalpartners. B.Totakeinyoungvolunteers. C.Tocarryoutprogrammes. D.Tofosterculturalawareness. 2TheprogrammebeginninginAugustwilloperatein. A.Egypt B.Algeria C.Kenya D.SouthAfrica 3ThesharedgoalofGDA'sprojectsisto. A.explorenewcultures B.protecttheenvironment C.gaincorporatebenefits D.helpcommunitiesinneed
ForCanaanElementary'ssecondgradeinPatchogueN.Y.todayisspeechdayandrightnowit'sChrisPalaez'sturn.The8﹣year﹣oldisthejokeroftheclass.Withshiningdarkeyesheseemslikethekindofkidwhowouldenjoypublicspeaking. Buthe'snervous.I'mheretotellyoutodaywhyyoushould…should…Christripsonthe﹣ldapronunciationdifficultyformanynon﹣nativeEnglishspeakers.HisteacherThomasWhaleyisnexttohimwhisperingsupport.…Votefor…me…ExceptforsomestumblesChrisisdoingamazinglywell.WhenhebringshisspeechtoaniceconclusionWhaleyinvitestherestoftheclasstopraisehim. AsonofimmigrantsChrisstartedlearningEnglishalittleoverthreeyearsago.Whaleyrecalls回想起howatthebeginningoftheyearwhencalledupontoreadChriswouldexcusehimselftogotothebathroom. LearningEnglishasasecondlanguagecanbeapainfulexperience.Whatyouneedisagreatteacherwholetsyoumakemistakes.IttakesalotforanystudentWhaleyexplainsespeciallyforastudentwhoislearningEnglishastheirnewlanguagetofeelconfidentenoughtosay‘Idon'tknowbutIwanttoknow.' Whaleygottheideaofthissecond﹣gradepresidentialcampaignprojectwhenheaskedthechildrenonedaytoraisetheirhandsiftheythoughttheycouldneverbeapresident.Theanswerbrokehisheart.Whaleysaystheprojectisaboutmorethanjustlearningtoreadandspeakinpublic.Hewantsthesekidstolearntoboast夸耀aboutthemselves. BoastingaboutyourselfandyourbestqualitiesWhaleysaysisverydifficultforachildwhocameintotheclassroomnotfeelingconfident. 1WhatmadeChrisnervous? A.Tellingastory. B.Makingaspeech. C.Takingatest. D.Answeringaquestion. 2Whatdoestheunderlinedwordstumblesinparagraph2referto? A.Improperpauses. B.Badmanners. C.Spellingmistakes. D.Sillyjokes. 3WecaninferthatthepurposeofWhaley'sprojectisto. A.helpstudentsseetheirownstrengths B.assessstudents'publicspeakingskills C.preparestudentsfortheirfuturejobs D.inspirestudents'loveforpolitics 4WhichofthefollowingbestdescribesWhaleyasateacher? A.Humorous. B.Ambitious. C.Caring. D.Demanding.
Oncealionessandhercubwerehuntinginthejungle.ThebabyaskeditsmotherMotherwhyarewehuntingwhenadeerisalreadyathome? ThemothersaidMylove!Wecan'teatthatdeerbecauseithassurrendered投降himselfseekingourhelp.Heiswoundedandhelpless.Wemusthelphim ThebabycubwassurprisedandquestionedagainWhyso?That'sourfoodwecaneatit. Honeyyouareright!It'sourfoodandwecankillhiminanysecondbutdoyouthinkhedeservestobekilledwhenhehascometo﹣usforprotection? Thebabycubcouldn'tunderstandhermother'svulnerability软弱.Itkeptquietandpacedwithitsmother.Atlasttheydidn'tgetanythingandcamebacktotheircave. Thedeerontheotherhandwasterrifiedofhisowndecisionoftakingshelterinthecave.Unfortunatelyhehadnochoice!Hewasattackedbyahunterandsomehowmanagedtoescape.Whilerunningforhislifehesawthecaveandwithoutasecondthoughtenteredit.Hehadalreadygotashotfromthehunter.Whenherealizedhewasinthelionscavehegaveuptheideaofrunningbackagain.ThedeergazedatthelionesswithapitifullooktearsrollingdownHesatthereasifheurgedforthemercyofthelioness. Thelionesscameclosertothedeersmelleditandslowlymovedoutofthecavewithhercub. WhenthelionscamebackthecubaskeditsmothertokillthedeeragainButthelionesswasfirmonherdecision.ShesaidSweetheart!Wecan﹣manageonenightwithoutanyfood.TomorrowIwoulddefinitelyfetchoutsomefoodforyou Thecubsaidnothinggrunted嘟哝alittle. WhenthecubsleptthelionesswhisperedtothedeerRunawayfromthisareabecauseIdoubtifIcouldsaveyouanylongerifthenexttimesituationdemands! Thedeerlookedatthelionesswithgratitudeandslowlywalkedawayfromthecave. 1Whatcontributestothedeer'ssurvival? A.Thehuntersmercy. BThelioness'ssympathy. C.Thecub'sunderstanding D.Thelioness'svulnerability 2Whatdoweknowaboutthedeer? A.Hetrustedthelioness B.Heregrettedsurrendering. C.Hewenttothecavebyaccident. D.Hetriedtofightthelioness 3Whatdoestheunderlinedsentenceimply? A.Thedeermightbekilled. B.Thehunterwouldspotthedeeragain C.Thelionesscouldcurethedeer. D.Thecubmightdrivethedeerout 4What'sthebesttitleforthetext? A.ArtofParenting B.ADeerHunt C.Momentofkindness D.ANarrowEscape
设等比数列{an}的前n项和为Sn且S2＝4a1则公比q＝
Whenmygrandmotherdiedattheageof96thereweretwothingssheleftbehindinabundance﹣﹣﹣nearly100photoalbumsdocumentingdecadesoftravelandhomelifeandadozenquiltsoneofwhichmymothergaveme. Quiltingistheprocessofsewingtogetherfabric作料tomakeonelargepieceoffabric.Inmyfamilyquiltingandsewingisatraditionthathasbeenpasseddownthroughthegenerations.Mymothersayshergreat﹣grandmotherwouldoccasionallytravelaroundNewYorkStatetosewclothingforotherfamilies. IntheUnitedStatesquiltingwasacraft手艺thatstartedasanecessityandeventuallybecamemuchmore.In186theU.S.governmentofferedmillionsofacresoflandtoAmericanswhowantedtomovewest.Thisallowedfamiliestosettleonlandthatthatcouldeventuallyown.Theyoftenbuilttheirownhomesandlivedoffthevegetablesintheirgardensandthelivestocktheyhad.Sewingwasveryimportantforwomenbecausetheywereresponsibleforclothingtheirfamiliesandkeepingthemwarm. Quiltingalsobecameachanceforwomentosocializewitheachother.Theywouldgatherforso﹣calledquiltingbeeswheretheywouldmeetupandworkononequiltingprojecttogether.Thisprovidedamuch﹣neededrelieffromthelonelylifeoflivingonalargepieceofland. ThroughouthistorythedifferentpatternsonAmericanquiltshaveconveyedallkindsofinformation.Fromthenwecantellwhereapersonlivedwhatregionofthewoldtheyoriginatedfromorsometimesastoryistoldinpicturesonaquilt. Eventodaywomenstillgathertoquittogetherinashowoffriendshipandaloveforthecraftjustliketheolddays.Mysisterhastriedquiltingafewtimesandhopefullyhertwodaughtersmayonedaycontinuethisfamilytradition. 1Whatdoweknowaboutquilting? A.Itisalosttraditionalcraft. B.ItisamajormeansofmakingalivingintheUSA. C.Itisacraftthathasbecomeaculturalsymbol. D.ItwasawaytocarryontheAmericanhistory. 2Whatdoestheauthorintendtodoinparagraph3? A.Introduceanewtopicfordiscussion. B.Summarizethepreviousparagraphs C.Addsomebackgroundinformation. D.PraisetheU.S.government'spolicy. 3Whatdoestheunderlinedwordthisinparagraph4referto? A.Workingontheland. B.Participatinginquiltingbees. C.Designingaquiltingproject. D.Clothingthefamily. 4Whatistheauthor'spurposeinwritingthetext? A.Toinstructhowtosewtogetherfabric. B.Toshowtheauthor'sskillsofquilting. C.Totellaboutthestruggleofwomen. D.Toappealforpreservationofquilting.
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