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已知随机变量ξ服从正态分布N（1，2），则D（2ξ+3）＝（ ）
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高三下学期数学《》真题及答案
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已知随机变量ξ服从正态分布N1σ2Pξ＜4＝0.84则Pξ＜－2＝
0.16
0.32
0.68
0.84
已知随机变量X服从正态分布N31且P2≤x≤4=0.6826则PX>4=
0.1585
0.1586
0.1587
0.1588
设随机变量ξ服从正态分布N34若Pξa＋2则a＝
4
3
2
1
设随机变量X和Y独立并且都服从正态分布Nμσ2求随机变量Z=minXY的数学期望．
已知随机变量X.服从正态分布N2σ2PX≤4＝0.84则PX
已知随机变量X服从标准正态分布在X=xx∈R条件下随机变量y服从正态分布Nx1则Y的密度函数fYy=
设随机变量X服从正态分布Nμσ2σ＞0Fx是X的分布函数随机变量Y=FX试求EX+Y
已知随机变量ξ服从正态分布N0σ2Pξ＞2=0.023则P-2≤ξ≤2=
0.997
0.954
0.488
0.477
设X是连续型随机变量且已知lnX服从正态分布Nμσ2求X与X2的期望．
已知随机变量X与Y都服从正态分布Nμσ2如果PmaxXY＞μ=a0＜a＜1则PminXY≤μ等于__
已知随机变量ξ服从正态分布N.2σ2P.ξ≤3＝0.8413则P.ξ≤1＝________.
设随机变量X服从正态分布Nμσ2σ＞0Fx是X的分布函数随机变量Y=FX试求Y的概率密度
已知随机变量X.服从正态分布N.1σ2且P.﹣1≤X.≤1=0.4则P.X.＞3=
关于中心极限定理下列说法正确的是
多个随机变量的平均值(仍然是一个随机变量)服从或近似服从正态分布
几个相互独立同分布随机变量，其共同分布不为正态分布或未知，但其均值μ和方差σ
2
都存在，则在n相当大的情况下，样本均值X近似服从正态分布N(μ，σ
2
/
无论什么分布(离散分布或连续分布，正态分布或非正态分布)，其样本均值X的分布总近似于正态分布
设n个分布一样的随机变量，假如其共同分布为正态分布N(μ，σ
2
)，则样本均值X仍为正态分布，其均值不变仍为μ，方差为σ
2
随机变量ξ服从正态分布N.1σ2已知P.ξ＜0=0.3则P.ξ＜2=
.已知随机变量ξ服从正态分布N.3σ2P.ξ≤4＝0.842则P.ξ≤2＝
0.842
0.158
0.421
0.316
已知随机变量ξ服从正态分布N.0σ2若P.ξ＞2＝0.023则P.－2≤ξ≤2＝__________
设X1X2Xn是独立同分布的随机变量已知它们的k阶原点矩[*]k=1234i=12n.试证随机变量[
设随机变量X服从正态分布Nμσ2σ＞0Fx是X的分布函数随机变量Y=FX试求EX2+Y2
已知随机变量ξ服从正态分布N12则D2ξ+3=
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Fewfactsaboutmodemlifeseemmoreundeniablethanhowbusyeveryoneseemstobe.Acrosstheindustrializedworldlargenumbersofsurveyrespondentstellresearchersthey'reoverburdenedwithworkattheexpenseoftimewithfamilyandfriends. ButthetotaltimepeopleareworkingwhetherpaidorotherwisehasnotincreasedinEuropeorNorthAmericainrecentdecades.What'smorethedataalsoshowthatthepeoplewhosaythey'rethebusiestgenerallyaren't. Partoftheanswerissimpleeconomics.Aseconomiesgrowandtheincomesofthebetter﹣offhaverisenovertimetimehasliterallybecomemorevaluableAnygivenhourisworthmoresoweexperiencemorepressuretosqueezeinmorework. Butit'salsoaresultofthekindofworkinwhichmanyofusareengaged.Inthepastfarmingworkwassubjecttoweatherlimitswhileatpresentpeopleliveinanunlimitedworldandtherearealwaysmoreincomingemailsmoremeetingsmorethingstoreadanddigitalmobiletechnologymeansyouhaveafewmoreto﹣dolistitems. Withtimepressureweighingusdownit'shardlysurprisingthatwelivewithoneeyeontheclock.Butpsychologicalresearchdemonstratesthatthistime﹣awarenessactuallyleadstoworseperformance.Sotheironicconsequenceofthebusyfeelingisthatwecouldhandleto﹣dolistlesswellthanifweweren'tsorushed. Arguablyworstofallthefeelingofrushspreadstoaffectourleisuretimesothatevenwhenlifefinallydoespermitanhourortwoforrecoveryweendupfeelingthatleisuretimeshouldbespentproductivelytoo. Ifthere'sasolutiontothebusynessepidemic流行病otherthantheuniversal21﹣hourworkweekitmaylieinclearlyrealizingjusthowreasonableourattitudeshavebecome.Historicallytheultimatesymbolofwealthachievementandsocialsuperioritywasthefreedomnottowork.Nowit'sbusynessthathasbecometheindicatorofhighstatus.Thebest﹣offinoursocietyareoftenverybusyandhavetobesaysGershunny.YouaskmeamIbusyandItellyou‘YesofcourseI'mbusybecauseI'manimportantperson! Toooftenwemeasureourworthnotbytheresultsweachievebutbyhowmuchofourtimewespend.Welivecrazylivesatleastinpartbecauseitmakesusfeelgoodaboutourselves. 1Accordingtotheauthorpeople'sfeelingaboutbusynessresultsfrom. A.theincreaseintimevalue B.thesacrificeoffamilytime C.thelongerworkingtime D.thechangeofworkingpartners 2Theunderlinedphraseweighingusdowninparagraph5isclosestinmeaningto. A.makingusoverburdened B.havingapositiveeffectonus C.measuringusinallaspects D.givingustimeforreflection 3WhichofthefollowingstatementsisTRUEaccordingtothepassage? A.Thesolutiontobusynessisapplyinga21﹣hourworkweek. B.Ifpeoplehadleisuretimetheywouldrelaxthemselves. C.Thefeelingofbeingburdenedspellslowproductivity. D.Freedomisoverrepresentedinthecurrentsociety. 4Whatdoesthepassagemainlyconcernedwith? A.Themeasurementofwealthinthecurrentsociety. B.Theevolutionofpeople'sattitudetowardsbusyness. C.Thehiddenreasonsandeffectsofpeople'sbusyness. D.Thesolutiontoprioritizingthecrucialtasksinbusyness.
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StudentsinCaldwellIdahocanattendclassintheirpajamas睡衣!AtVallivueVirtualAcademycoursesaretaughtonline.Studentsworkathomewithparentswhoserveaslearningcoaches.Acertifiedteacher1thestudents'progress. Thecyberschoolwas2asafreeoptionforstudentsinkindergartenthroughgrade8whohavetroublesucceedinginthedistrict's3publicschool.Supportersoftheprogramsaythatvirtualschoolshelpstudentsavoidthesocialpressuresthatcan4withlearning.Inadditionsupportersargueonlinecoursesprovidekidswithmorefocused5andcourseoptionsthantheycangetinatypicalschool. Noteveryonegivescyberschoolsapassinggradehowever.Someeducatorsarguethatonlinelearningmakesithardforstudentstomakefriends.Manyparentsalsofeelthatcyberschoolsput6timedemandsonthembecausetheyhavetooverseetheirkids'dailywork. Technologycanbenefiteducationbutitshouldn't7education.Studentswhogotovirtualschoolswillmissmanyofthebenefitsofbeinginarealschool. Ifkidsattendschoolonlinetheywillmissoutonimportantsocial8.PaytonMcdonough13aseventhgraderfromGlencoeIll.agrees.Idon'tknowhowIcouldsitatacomputeralldaywithout9interactingwithmypeersandteachershesays. Inadditionvirtualschoolsdon'thaveenoughstructure.Studentswhotakeonlinecoursescansettheirownscheduleswhichwillcauseproblemsforstudentswhohavetroublestaying10. Furthermoreonlineschoolingputsstressonparentsbecausetheyhaveto11whattheirkidsdoathome.Manyparentshavefull﹣timejobs.Howaretheygoingtoruntheirchildren'seducation12intheirjobsandtakecareoftheirotherresponsibilitiesathome? Virtualschoolswillmakeitharderforstudentstolearnandwillputtoomuchpressureonparents. Virtuallearningdoesnotneedtoreplaceclassroomlearning13butitcanhelpstudentsworkattheirownpace.Ifstudentsstrugglewithsubjectstheycantakethosecoursesonlineandspendmoretimeonthem.Virtualschoolscanalsoofferstudentsmuchmore14schedules.Studentsoftenhandleextracurricularactivitiessportsandschoolworkandcyberschoolscouldhelpthemmanageeverything. Finallyattendingvirtualschoolcanpreparestudentsforcollegeandforworkafter15.WeneedtoberesponsibleforworkingonourownsaysAngelaGosciloaseniorfromPoundRidgeN.Y.Weneedtodeveloptechnologyskillsthatwillhelpusinwhateverwedo.Gettinganearlystartisagoodidea. 1A.oversees B.suspected C.admitted D.predicted 2A.tolerated B.launched C.undergone D.transformed 3A.virtual B.superior C.traditional D.specialized 4A.agree B.putup C.go D.interfere 5A.attention B.definition C.foundation D.instruction 6A.unlimited B.uncivilized C.unrealistic D.unaffected 7A.turnto B.takeover C.takein D.makeup 8A.interactions B.education C.occupation D.identification 9A.actually B.presently C.naturally D.logically 10A.examined B.motivated C.exhausted D.represented 11A.compliment B.award C.supervise D.tempt 12A.negotiate B.innovate C.control D.excel 13A.entirely B.partially C.regularly D.purposely 14A.sustainable B.flexible C.relevant D.optimistic 15A.school B.study C.graduation D.education
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IhadateacherwhousedtowakeusupinclassbyshoutingTheearlybirdgetstheworm!Isaylethimhavetheworm.Ihatefoodthatdoesn'tstaystillandavoidJapaneserestaurantsforthatveryreason.AnywayIstoppedeatingwormsattheageofthreeswitchingtoregularbreakfastsofcereal谷物towhichIwouldaddextrasugar. RecentlyIwasthinkingaboutearlybirdsandthecompetitivespiritafterreceivingaletterfromareaderinMalaysiaMysondeliberatelythrowsawaymarksbecausehedoesn'tliketobetopoftheclass.WhatshallIdo?Givehimaroundofapplauseforbeingsmart!ActuallymanychildreninAsiatendtobethefocusbyperformingbetter. PlacedintoaverycompetitiveclasswhenIwas11Iquicklylearnedtheidealpositionwassecondtolast.Thetopthreeperformersandtheverylastpersonarehighlightedthesecond﹣to﹣lastcontestantisINVISIBLE.Andifsaneasypositiontoget～justdeliberatelyunderperformateverytest.Icoulddothat.Ioncecamesecondtolastineightstraightsportsdayraces.Noonesuspectedanything.IwassoinvisiblethatIcouldhaverobbedabankinmystreetandnoonewouldhavenoticed. AttheLondonOlympicsafewmonthsagobadmintonpairsfromthreeAsiancountriesdeliberatelytriedtolosematchestodrawgoodlotsinlaterrounds.Itwasfunnytowatchbuttheywereallthrownoutforpoorsportsmanship.Whattheyreallyneededwereactinglessonstheirmovesweresounconvincing.OopsIhittheballinentirelythewrongdirection. TheotherdayItookthechildrenoutandtheyracedforthecar.I'mfirstsaidone.ThesecondsaidFirstisworstsecondisbest.TogethertheysangatthelastoneAndthird'stheonewithahairychest. Itstruckmethattheorganizersofsportsmatchescouldusethissongwhenpeopledeliberatelylosematches.Ilostthedelightedloserwillsay.ThejudgescouldstilldeclarethemwinnerspointingtoanewoptionalregulationFirstisworstsecondisbestthird'stheonewithahairychest. 1WhydidtheauthordislikeJapaneserestaurant? A.Itsfoodwasservedraw. B.Itsfoodcontainedworms. C.Hewastemptedbycereal. D.Hewasaffectedbythesaying. 2Howdidtheauthormanagetobeinvisibleinacompetitiveclass? A.Hehighlightedthetopthreestudents. B.Hecametosecondinsportsraces. C.Hehidhimselfinabankskillfully. D.Heintentionallyunderperformed. 3Whatcanbelearnedfromthepassage? A.Thejudgeisencouragedtoeliminatethedishonestplayers. B.PlayersdisqualifiedfromOlympicdoublesforusingdrugs. C.Children'ssongpraisesthedramaticactingskillsofathletes. D.Playerspurposefullyfailedforeasierlotsinthefollowingrounds. 4Whichsayingmighttheauthorpossiblysupport? A.Greatmindsthinkalike. B.Godfavorsthosewhoareprepared. C.Honestyisthebestpolicy. D.Abirdinhandisworthtwointhebush.
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HowShouldSchoolEducationBeReformed? ThestateofpublicschoolfacilitiesintheUnitedStatesisamatterofgreatconcerntoeducatorsandadministrators.Whilethemissionofpublicschoolshasexpandedbeyondeducationtoincludesocialsupportandextra—curricularactivitiestheacademicschedulehaschangedlittleinmorethanacentury.Areportontimeandlearningreleasedtodaybythestateeducationcommitteesayssavingschooltimeforacademicteachingandmovingawayfromthetime—limitedtraditionofeducationarecrucialstepsintheschoolreformprocess. Thecommittee'sreportentitledTimePrisonerdescribedfixedclocksandcalendarsinAmericaneducationasafundamentaldesignproblemthaturgentlyneedstobechanged.Timeshouldservechildreninsteadofchildrenservingtime.thereportsays.Thetwo—yearcommitteefoundthatholdingAmericanstudentstoworld—classstandardswillrequiremoretimeforclassroominstruction.Wehavebeenaskingtheimpossibleofourstudentsthattheylearnasmuchastheirforeignpeerswhilespendinghalfasmuchasincoreacademicsubjects.itstates. ThecommitteecomparedtherelationshipbetweentimeandlearninginJapanGermanyandtheUnitedStatesandfoundthatAmericanstudentsreceivedlessthanhalfofthebasicacademiceducationreceivedbyJapaneseandGermanstudents.OnaverageAmericanstudentscanearnahighschooldiplomaiftheyspendonly41percentoftheirschooltimeonacademicssaysthereport.AmericanstudentsspendanaverageofthreehoursadayoncoreacademicssuchasEnglishmathscienceandhistorythecommitteefound.Theirreportrecommendsofferingaminimumof5.5hoursofacademicseveryschoolday. Thenine—membercommitteealsorecommendedextendingthedailyschoolhoursbeyondthetraditionalsixhours.Ifschoolswanttocontinueofferingimportantactivitiesoutsidetheacademiccoreaswellasservingasacenterforfamilyandcommunityservicestheyshouldkeepschooldoorsopenlongereachdayandeachyear.saysJohnHodgeJoneseducationofficialofschoolsinMurfreesboroTenn.andchairmanofthecommittee.ThetypicalschoolyearinAmericanpublicschoolsis180days.Elevenstatesallowschoolyearsof175daysorlessandonlyonestaterequiresmorethan180days. ForoveradecadeeducationreformershavebeenworkingexcitedlytoimproveourschoolssaysMiltonGoldbergexecutivedirectorofthecommittee.But…ifreformistotrulytakeholdthesix—hour180—dayschoolyearshouldgointomuseums—anexhibitfromoureducationpast. 1Comparedwiththeacademiccoursesmorethanahundredyearsagotheacademiccoursesnow. A.includesomeextra—curricularactivities B.remainmuchofwhattheyusedtobe C.demandstudents'morecontributionoftime D.focusmoreoneducationofsocialsupport 2Theresearchesbythecommitteementionedinthepassagearemostconcernedabout. A.thefashionofeducationmanagement B.theelementsofschooleducation C.thechangesineducationintherecentcentury D.thetimedevotedtoacademiclearning 3AsitismentionedinthepassageschoolsintheU.S.Adothefollowingexcept. A.provideimportantoutside—academicactivities B.havecompetitionwithschoolsofothercountries C.arrangesix—hourteachingandlearningeveryday D.servesocialunitssuchasfamilyandcommunity 4ExecutivedirectorofthecommitteeMiltonGoldbergwouldmostprobablydisagreethat. A.thetimeofschooldayandschoolyearshouldbereduced B.whattheeducationreformershavedoneisnotgoodenough C.visitingmuseumscanimprovestudents'academiclearningability D.socialsupportandextra—curricularactivitiesshouldbecancelled
DirectionsWriteanEnglishcompositionin120—150wordsaccordingtotheinstructionsgivenbelowinChinese. 日前一社会机构对高中生认为最有用的手机app类型进行调查结果如下 请简单描述以上数据并结合自身实际谈谈你对这一调查结果的看法. 文中不得出现考生姓名学校等真实信息
A.biologicalB.energyC.potentialD.deviceE.project F.decidedG.transformedH.technologyI.eventuallyJ.supportK.completely UsingPlantsToGenerateElectricity Asfreeastheymakeusmobilephonesstillneedtostayclosetoapowersource.Soonthatmaychangewithgreenpower.ThreeChileanstudentsgottheideaforaplant—powered1tochargetheircell—phoneswhilesittingintheirschool'soutdoorcourtyardduringabreakfromexamswithdeadmobilephones.Thenoneofthemhadanahamoment. ItoccurredtoCamilatosayaboutplantssaidinventorEvelynAravena.Whydon'tyouhaveasocketiftherearesomanyplants?Afterthatwethoughtwhydon'ttheyhaveacharger?Becausetherearesomanyplantsandlivingthingsthathavethe2toproduceenergywhynot? Theirinvention—asmall3currenttheycallE—Kaia—usestheenergyplantsproduceduringphotosynthesis.Aplantusesonlyapartofthatenergy—therestgoesintothesoilandthat'swheretheE—Kaiacollectsit.Thedeviceplugsintothegroundandthenintoyourphone.MauricioCifuentesofDuocUniversitysaidIt'sthemostamazing4I'veeverseeninmylifeplainandsimple.AtleastfrommypersonalpointofviewIbeganto5them.Itwastransformational. Thedevicesolvedtwoproblemsfortheengineeringstudents—theyneededanideaforaclassprojectandanoutlettoplugintheirphones.Lookingforaplacetochargethenotebookwhichhadno6andthemobilephonesweweren'tabletofindanythingbecausealltheotherstudentswereinthesamestateofmadnesstryingtofindaplacetochargetheirdevicessaidAravena.Butplantsareeverywhereandthebio—circuittapsintotheirexcesspower.Thereisacompleteenergycycleoftheplant.We7tomakeuseofthecyclethenwewouldnotaffecttheplant'sgrowth.Thebio—circuitmakesanacquisitionandthatis8intoenergytolatermakechargesforlowconsumptionsaidinventorCamilaRupcich. TheE—Kaiadoesn'tcarrymuchchargebutit'spowerfulenoughto9rechargeamobilephoneinlessthantwohours.Thestudentinventorshaveappliedforpatentsontheir10andexpecttheE—Kaiatogoonsaleinthenearfuture.
UNIQLO'sfoundertriestofindawaytobeatZaraandH&M WhenaskedwhatguideshisvisionofUNIQLOTadashiYanaiitsfounderandchiefexecutivepullsofftheshelfthe1987autumn/wintercollectioncatalogueofNextamass﹣marketBritishretailer.Alloftheclothesareso1hesaysthattheycouldbeworntoday.WhileZaraofSpainandH&MofSwedenfollowfashiontrendswithouthavinganyoriginalthoughtUNIQLOofJapan2totimelessbasics. Mr.Yanaihasa/an3baseathomefromwhichtodevelopintohisWesterncompetitors'mainmarketsofEuropeandAmerica.Butinsteadhis4remainsAsia.Asiaistheengineofgrowthtodayhesayspointingtothemillionsofconsumersacrossthe5whoarereachingthemiddleclass.UNIQLOwillopenitsfirstshopinIndiathisyearandisconsidering6intoVietnamandothercountriesithasalreadyopenednetworksofshopsinIndonesiaSingaporeandThailand. ThesuccessornotofUNIQLO'soverseasoperations7greatlytoinvestorsathome.FastRetailing'sshares﹣Mr.Yanaiownsjustover20%ofthefirm﹣havebeenrisingsince2015analystsestimatelargelyowingtoitsinternationalexpansionandimprovedlogistics物流.Athomethefirmisclosingstoresbecausethepopulationis8.LastyearUNIQLO'sinternationalprofitsovertookits9salesforthefirsttimeanditsforeignoperatingprofitsalmostequaleditsJapaneseequivalent. ThoughtheyareverydifferentmarketsEuropeandAmericaofferacautionarytale.UNIQLOinAmericastruggledoutsidethebigcitiesoftheeastandwestcoasts.GrowthinAmericaremains10forUNIQLOboththereandinEurope.HoweverMr.YanaianenthusiasticfanofglobalizationisconfidentthathecanguideUNIQLOthroughthechangesneeded.
WhenJenniferLawrencetrippedonherwaytoacceptherbestactressOscaroneyearherpinkprincess—likeDiordress1captureinallitsglory.Theunscriptedmomentbecamehottopicthroughoutsocialmedia. Thatbonusair—timeforasingledressatoneoftheworldsglobaleventsispricelessforthelikesofDioroneofthe2influentialfashionhousesintheluxurymarketplace. Successontheredcarpetcanearnexposureandprofitsforluxurybrandsforyears3come.TheredcarpetwhichwillbetelevisedlivebeforeAcademyAwardceremonypresentsagreatopportunityforadesignertoreachanaudiencethatexpands4thefashionsetting.TheLawrencedressreceivedabout40millionmentionsonvarioussocialmedia. Onewayofestimatingthemonetarybenefitsofhavingastandoutdressontheredcarpetistocomparehowmuchabrandwouldotherwisespendoncommercialadvertisingduringthesametime.5Lawrencehadonly75secondsofsolocameratimeforherOscaracceptancespeechDiorhadtopaymorethan$4millionforacommercialspotofthesamedurationonsimilaroccasions.Andthisdidn'tincludethetime6devotetoLawrenceandherdressonthepre—showtelevisedredcarpet.Lawrence23hadanadvertisingcontractwithDior.7thegroup'sdealwithLawrenceaffecteditssaleswasclearlystatedinitsannualfinancialreport.Thatyearthegroupclothingsection'sprofits8total165millioneurosup26percentfromthepreviousyear. Hestonthefounderofapublicityfirm9successstoriesincludeintroducingJimmyChooshoesanddesignerSaabtoHollywoodbelievesthattheOscarredcarpetistodaydominatedbyestablishedluxurybrands.Findingitmuchmoredifficulttocompetewithbigbrandnamestodresssuperstarsonbigeventsmanyyoungdesignersturnto10betonpromisingrisingstarsexpectinganovernightsuccessiftheyoungstarsrisetosuddenfame.
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ThebiggesthouseofcardsthelongesttongueandofcoursethetallestmantheseareamongthethousandsofrecordsloggedinthefamousGuinnessBookofRecords.Createdin1955afteradebate1concernEurope'sfastestgamebird2beganasamarketingtoolsoldtopublandlords3promoteGuinnessanIrishdrinkbecamethebestsellingcopyrighttitleofalltimeacategorythatexcludesbookssuchastheBibleandtheKoran.Intimethebookwouldsell120millioncopiesinover100countries﹣quitealeapfromitshumblebeginnings. Initsearlyyearsthebooksetitssightson4satisfyman'sinborncuriosityaboutthenaturalworldaroundhim.ItstwoprincipalfactfinderstwinsNorrisandRossMcWhirtermovedwildlyaroundtheglobetocollectfacts.Itwastheirtasktofindanddocumentaspectsoflifethatcanbesensedorobservedthingsthatcanbequantifiedormeasured.Butnotjustanythings.Theywereonlyinterestedinsuperlativesthebiggestandthebest.Itwasduringthisperiod5someoftheremarkableGuinnessRecordsweredocumentedansweringsuchquestionsasWhatisthebrighteststar?andWhatisthebiggestspider? Onceawareofthepublic'sthirstforsuchknowledgethebook'sauthorsbegantobranchouttocoverincreasinglydoubtfullittle﹣knownfacts.Theystarteddocumentinghumanachievementsaswell.AforerunnerforrealitytelevisiontheGuinnessBookgavepeople6chancetobecomefamousforaccomplishingoddoftenpointlesstasks.Recordsweresetin1955forconsuming24raweggsin14minutesandin1981forthefastestsolvingofaRubik'sCubewhichtookamere38seconds.In1979amanyodeled用真假嗓音交替唱non﹣stopfortenandaquarterhours. Initslatestappearancethebookhasfoundanewhomeontheinternet.Nolonger7restricttothelimitsofphysicalpapertheGuinnessWorldRecordswebsitecontainsseeminglyinnumerablefactsconcerningsuchtopicsasthemostpowerfulcombustion燃烧engineortheworld'slongesttrain.Whatisstrikinghoweveristhatsuchfactsarefoundsharingapagewiththerecordoftheheaviesttraintobepulled8abeard. OriginatingasasimplebarbooktheGuinnessBookofRecords9evolveoverdecadestoprovideinsightintothefullrangeofmodernlife.Andalthoughonemaybe10likelynowtolearnaboutthewidesthumanmouththanthehighestnumberofcasualtiesinasinglebattleoftheCivilWartheGuinnessWorldRecordswebsiteoffersatellingglimpseintothefutureoffact﹣findingandrecord﹣recording.
如图是利用电子秤显示水库水位装置的示意图．该装置主要由滑轮CD物体AB以及轻质杠杆MN组成．物体A通过细绳与滑轮C相连物体B通过细绳与杠杆相连．杠杆可以绕支点O在竖直平面内转动杠杆始终在水平位置平衡且MOMN＝13．物体B受到的重力为100NA的底面积为0.04m2高1m．当物体A恰好浸没在水中时物体B对电子秤的压力为F1若水位下降至物体A恰好完全露出水面时物体B对电子秤的压力为F2已知每个滑轮的重力为20NF1F2＝277．滑轮与转轴的摩擦杠杆与轴的摩擦均忽略不计g取10N/kg． 求 1物体A的底部距水面深为0.75m时A底部受到的液体压强． 2当物块A的顶部刚没入水面时物块A所受的浮力大小． 3物块A的密度ρ． 4如果把细绳由N端向左移动到N′处电子秤的示数恰好为零MN′MN＝56此时物体A露出水面的体积V．
DirectionsWriteanEnglishcompositionin120﹣150wordsaccordingtotheinstructionsgivenbelowinChinese. 假设你将组织本班的毕业聚会谈谈你的具体设想并说明理由. 内容必须包括 1.明确聚会将在何时何地以何种形式举行 2.简述你的理由 文中不得出现真实姓名和学校名称
DirectionsReadthefollowingpassage.Summarizethemainideaandthemainpointsofthepassageinnomorethan60words.Useyourownwordsasfaraspossible.ToBeACreativePersonWithoutcreativepeopletheworldwouldbeaterribleplace.Canyouimaginealifewithoutart?Thethoughtalonemakesmetremble.CouldyoubethenextWilliamShakespeareStevenSpielbergorJ.K.Rowling?Creativetypesdon'talwaysgetalongwellwithmanagementbecausetheywouldrathermarchtothebeatoftheirowndrum.Mostpeoplehaveastrongdesiretofitinsomethingthatyoudon'tunderstand.Followingtherulesmakesyouuncomfortable.Whilemostpeoplearerunningandhidingfromproblemsyoupurposelyseekthembecauseyoulovenothingmorethanafreshnewchallenge.Youwroteablogmanymonthsagoandthoughtitwaswonderfulatthetimeyoupublishedit.Butthenyoureaditagainlaterandwonder'WhatonearthwasIthinking?'Youthenidentifyapproximatelyathousandwaysitcouldhavebeenbetterandkickyourselfforbeingsostupid.Abrainlackingcuriosityisnotcreative.Somewritersgotoacountryhouseorbeachtowritenovelsforareason.Someatmospheresaremorehelpfultocreativitythanothers.Maybeyouliketopackupyourlaptopandgotoacoffeeshopdowntownbenchorunderatreeatthepark.Whateverthecasemaybeyouneedtoknowwheretogotodevelopyourcreativity.Inspirationdoesn'thappenonitsown.Whetheritistheopeningofanartgalleryatheatricalproductionorlivemusicatadowntownbaryousearchforinspirationwhereveryoucanfindit.It'snicetoknowyou'renotaloneinyourdesiretocreate.Whetherapersonwhohatesyouthinksyourartisbadafamilymemberthinksyoudeservearealjoborafriendthinksyourideaswillneverworkandyouwillnevergiveintooutsidepressure.
A.Onereasonthatit'surgentisthatcountriesaresendingmoreandmoreobjectsintospace. B.Therearealsomillionsofsmallerpiecesofjunkthatwecan'tsee. C.Blowingupoldersatelliteswithamissilemaycreatethousandsofsmallerpieces! D.Intheupperpartsoftheatmosphereitwillburnup. E.Whentwoobjectsinspacecollidethetwoobjectsbreakintomanysmallerpieces. F.Yearsofspaceexplorationhavelefttonsofspacejunkinorbitaroundtheplanet. ManypeopleknowthattrashisabigproblemonplanetEarth.Whatmanypeopledon'tknowisthattrashhasbecomeaprobleminouterspacetoo.1Statisticallytherearemorethan22000piecesofjunkinspacearoundtheearth.Andthesearejusttheitemsthatwecanseefromthesurfaceoftheearthbytelescopesorradars.2Objectslikebitsofoldspacerocketsorsatellitesmovearoundtheplanetatveryhighspeedssofastthatevenaverysmallpiececanbreakimportantsatellitesorbecomedangeroustopeopleparticularlyastronauts.Ifthetiniestpieceofjunkcrashedintoaspacecraftitcoulddamagethevehicle.That'sbecausethefasteranobjectmovesthegreatertheimpactiftheobjectcollideswithsomethingelse. Tohelpminimizeadditionalspacejunkcountriesaroundtheworldhaveagreedtolimitthetimetheirspacetoolsstayinorbitto25years.Eachtoolmustbebuilttofallsafelyintotheearth'satmosphereorthemassofgasesthatsurroundtheearthafterthat.3Manyscientistsarealsoproposingdifferentwaystocleanupspacejunk.TheGermanshavebeenplanningaspacemissionwithrobotsthatwouldcollectpiecesofspacetrashandbringthembacktoEarthsothattheycanbesafelydestroyed. Inouropiniontheproblemisverychallengingandit'squiteurgentaswellsaidMarcoCastronuovoanItalianSpaceAgencyresearcherwhoisworkingtosolvetheproblem.4Manyoftheseobjectsaretoolsthathelppeopleusetheircellphonesorcomputers. Thetimetoactisnowaswegofartherintimewewillneedtoremovemoreandmorefragmentshesays.
小洋用“伏安法”测未知电阻R的电阻值他设计的电路图如图甲所示． 1连接电路时开关应处于选填“断开”或“闭合”状态．闭合开关前滑动变阻器的滑片应移到最选填“左”或“右”端的位置． 2连接好电路闭合开关发现电流表和电压表都有较小的示数且无论怎样移动滑动变阻器的滑片电流表和电压表的示数都不变．造成这一现象的原因可能是．选填字母 A．电阻R断路B．电阻R短路 C．滑动变阻器短路D．滑动变阻器接了下面的两个接线柱 3小洋排除故障后重新连接好电路进行实验上表是他记录的实验数据第一次实验中电流表的示数如图乙所示．通过计算该定值电阻的阻值约是Ω．计算结果保留一位小数 4小清设计的测量另一待测电阻Rx阻值的电路如图丙所示图中电源电压保持3V不变滑动变阻器R的规格为“50Ω1A”． ①他的测量步骤如下 第1步只闭合开关调节选填“R”或“R0”使电压表的示数为2V 第2步只闭合开关调节选填“R”或“R0”使电压表的示数仍为2V读出此时电阻箱接入电路中的阻值如图丁所示则待测电阻的大小为Ω ②在第2步中若小清无意中将滑动变阻器的滑片P向左移动少许使滑动变阻器接入电路的阻值减小了2Ω则小清测得Rx的阻值为Ω．
DirectionsReadthefollowingpassage.Summarizethemainideaandthemainpointsofthepassageinnomorethan60words.Useyourownwordsasfaraspossible.LonelinessPeaksForyearsAmericahasbeentalkingaboutobesitybutanewstudypointstoamoreserioushealthissueisolationandloneliness.Beingconnectedtootherssociallyiswidelyconsideredafundamentalhumanneed﹣crucialtobothwell﹣beingandsurvival.Extremeexamplesshowinfantswholackhumancontactincarefailtogrowandoftendie.Indeedsocialisolationhasbeenusedasaformofpunishment.AccordingtoJulianneHolt﹣LunstadtheleadauthorofthestudyanincreasingportionoftheU.S.populationnowexperiencesisolationregularly.Over42millionadultsaboveage45intheU.S.areestimatedtobesufferingfromchronic长期的loneliness.Thestudyof340adultsbetweentheagesof27and101livinginSanDiegoidentifiedthreekeyagerangeswhenpeoplefelttheloneliest.Participantswhohadthehighestlevelsoflonelinesswereintheirlate﹣20smid﹣50sandlate﹣80s.Whileitmaycomeasasurprisethatpeopleintheirlate﹣20ssufferedfromlonelinessalargersurveyshowstheyactuallymaysufferthehardest.Withanincreasingnumberofpeopleworkingfromhomewatchingtelevisiongettingintoanaddictiontoelectronicdevicesithasbecometooeasytobealoneevenifthat'snotaperson'sintention.Moderndayconvenienceslikehavinganythingwewantdeliveredmakeitpossibletoneverneedtoleavethehouse.Sonotsurprisinglythosewithfrequentsocialcontactusuallyfeellesslonelythanthosewithfewsocialties.Mountingevidencesuggestssocialisolationandlonelinesssignificantlyimpactourhealthandevenshortenourlivesjustlikeobesity.Thisstudyisn'tthefirsttimelonelinesshasbeenflaggedasanemerginghealthissue.Thereforereducingbothisolationandlonelinessisimportantforqualityoflifeandwell﹣being.
MiltonHersheywasbornnearthesmallvillageofDerryChurchPennsylvaniain1857.Heonlyattendedschoolthroughthefourthgradeatthatpointhewasapprenticed做学徒toaprinterinanearbytown.AfterawhilehelefttheprintingbusinessandwasapprenticedtoaLancasterPennsylvaniacandymaker.AndattheageofeighteenheopenedhisowncandystoreinPhiladelphia.Inspiteofhistalentsasacandymakertheshopfailedaftersixyears. AfterthefailureofhisPhiladelphiastoreMiltonheadedforDenverwherehelearnedtheartofmakingcaramels焦糖.TheninDenverMiltononceagainattemptedtoopenhisowncandy﹣makingbusinessesinChicagoNewOrleansandNewYorkCity.Finallyin1886hewenttoLancasterPennsylvaniawhereheraisedthemoneynecessarytotryagain.Thiscompany﹣theLancasterCaramelCompany﹣establishedMilton'sreputationasamastercandymaker. In1893MiltonattendedtheChicagoInternationalExpositionwherehesawadisplayofGermanchocolate﹣makingimplements.FascinatedbytheequipmenthepurchaseditforhisLancastercandyfactoryandbeganproducingchocolatewhichheusedforcoatinghiscaramels.Bythenextyearproductionhadgrowntoincludecocoasweetchocolateandbakingchocolate.TheHersheyChocolatecompanywasbornin1894asasubsidiary子公司oftheLancasterCaramelCompany.SixyearslaterMiltonsoldthecaramelcompanybutreservedtherightsandtheequipmenttomakechocolate.Hebelievedthatalargemarketofchocolateconsumerswaswaitingforsomeonetoproducereasonablypricedcandy.Hewasright. MiltonHersheyreturnedtothevillagewherehehadbeenbornintheheartofdairycountryandopenedhischocolatemanufacturingplant.Withaccesstoallthefreshmilkheneededhebeganproducingthefinestmilkchocolate.TheplantthatopenedinasmallPennsylvaniavillagein1905istodaythelargestchocolatefactoryintheworld.Thesweetscreatedatthisfacilityarefavoritesaroundtheworld. TheareawherethefactoryislocatedisnowknownasHersheyPennsylvania.WithinthefirstdecadesofitsexistencethetownofHersheythrivedasdidthechocolatebusiness.Abankaschoolchurchesadepartmentstoreevenaparkandatrolleysystemallappearedinshortorderthetownsoonevenhadazoo.TodayavisittothearearevealstheHersheyMedicalCenterMiltonHersheySchoolandHershey'sChocolateWorld﹣athemeparkwherevisitorsaregreetedbyagiantReesesPeanutButterCup.Allofthesethings﹣andahugenumberofhappychocolatelovers﹣weremadepossiblebecauseacaramelmakervisitedtheChicagoExpositionof1893! 1Thementionofthe1893Expositionindicatesthat A.theexpositioninChicagoisheldonceeverythreeyears. B.thethemeoftheexpositionof1893wasFoodfromAroundtheWorld. C.theexpositioncontaineddisplaysfromavarietyofcountries. D.thesiteoftheexpositionisnowabranchoftheHersheyChocolateCompany. 2AccordingtothepassageMiltonHersheysoldhiscaramelcompanyin A.1894. B.1900. C.1904. D.1905. 3Whatcanyouinferfromthepassage? A.Chocolateispopularineverycountryintheworld. B.ReesesPeanutButterCupsaremanufacturedbytheHersheyChocolateCompany. C.ChocolatehadneverbeenmanufacturedintheUnitedStatesbeforeMiltonHersheydidit. D.TheHersheyChocolateCompanynowmakesmoremoneyfromHershey'sChocolateWorldthanfromthemanufactureandsaleofchocolate. 4Theauthorwrotethispassagemainlyto A.recountthefoundingoftheHersheyChocolateCompany. B.describetheprocessofmanufacturingchocolate. C.comparethepopularityofchocolatetoothercandies. D.explainhowapprenticeshipswork.
比的前项不能是0．判断题
AmericanViewOnBusiness HenryFordafamousAmericaninventorandcarmakeroncesaidAmericanbusinessisbusiness.WhathemeantbythisisthattheAmericanwayoflifeisbasedonthevaluesofthebusinessworld. FewwouldarguewithFord'sstatement.AbrieflookatadailynewspapervividlyshowshowmuchpeopleintheUnitedStatesthinkaboutbusiness.Forexamplenearlyeverynewspaperhasabusinesssectioninwhichthedealsandprojectsfinancesandmanagementstockpricesandlaborproblemsofcorporationsarereporteddaily. Inadditionbusinessnewscanappearineveryothersection.Mostnationalnewshasanimportantfinancialaspecttoit.WelfareforeignaidthefederalbudgetandthepoliciesoftheFederalReserveBankareallheavilyaffectedbybusiness.Moreoverbusinessnewsappearsinsomeoftheunlikeliestplaces.Theworldofartsandentertainmentisoftenreferredtoastheentertainmentindustryorshowbusiness. ThepositivesideofHenryFord'sstatementcanbeseeninthewealththatbusinesshasbroughttoU.S.life.OneofthemostimportantreasonswhysomanypeoplefromallovertheworldcometoliveintheUnitedStatesisthedreamofabetterjob.ManyjobsareproducedbecausetheU.S.economicsystemisdrivenbycompetition.Peoplebelievethatthissystemcreatesmorewealthmorejobsandamateriallybetterwayoflife. ThenegativesideofHenryFord'sstatementhowevercanbeseenwhenthewordbusinessistakentomeanbigbusiness.Andthetermbigbusiness—referringtothebiggestcompaniesisseeninoppositiontolabor.ThroughoutU.S.historyworkingpeoplehavehadtofighthardforhigherwagesbetterworkingconditionsandthefighttoformunions.Todaymanyoftheoldlaborargumentsareoverbutthereisstillsomeemployeeanxiety.Thelayingoffofthousandsofworkerstokeepexpenseslowandprofitshighcreatesfeelingsofinsecurityformany. 1AccordingtothepassagetheUnitedStatesisatypicalcountry. A.whichencouragesfreetradeathomeandabroad B.whichnormallyworksaccordingtothefederalbudget C.whereallbusinessesaremanagedscientifically D.wherepeople'schiefconcernishowtomakemoney 2WhydoimmigrantschoosetosettleintheUnitedStatesaccordingtothepassage?Becausetheythinkthat. A.theycanstartprofitablebusinessesthere B.theycanfindmoreandbetterwaystomakealiving C.theywillmakeafortuneovernightthere D.theycanbemorecompetitiveinbusiness 3WhycanHenryFord'sstatementbetakennegativelyaccordingtothepassage? A.Becauseworkingpeoplearediscouragedtofightfortheirfights. B.Becausepublicservicesarenotrunbythefederalgovernment. C.Becausetherearemanyindustriescontrolledbyafewbigcapitalists. D.Becausethereisaconflictingrelationshipbetweenbigcorporationsandlabor. 4Whichofthefollowingstatementsistrueaccordingtothepassage? A.Inthebigbusinesstherearefewerargumentsbetweenlaborandmanagement. B.Thenegativeeffectsofbusinessnewswillincreaseemploymentopportunities. C.Keepinglowercostsandhigherprofitscouldleavemanyunemployed. D.Intheworldofartsandentertainmentthereisalwaysariseinworkers'wages.
暴饮暴食被一些人认为是缓解工作压力的手段.regard
Whilefakingandfiercelooksareamonganimalsgreatdefensesmanyspeciesknowthateveryonerunsfromabigstink臭气too. Vulture秃鸳 Vulturesarestreetsweepersthatfeastontherottingfleshofdeadanimalswhichbenefitsusbyriddingourhighwaysandlandscapesofanimalbodiesandthebacteriatheymightcarry.Whenvulturesfeelthreatenedtheyvomitandthesmellofvomited—ondeadbodiesputsofmostpredators.Throwingupallowsthevulturetoflyawaymorequickly—andthevomitcanhurttheaggressor'seyesandface. Opossum负鼠 Insomewaysopossumshaveiteasy.Inordertobecomedeadtheydon'thavetofaxanyoneadeathcertificate.Theyjustlietherewiththeirtongueshangingoutwiththesmellofdeadfleshsometimesforhourseffectivelyconvincingpotentialpredatorstheycanfindamuchfreshermealelsewhere.Eveniftheykeepgettingattackedtheywon'tmoveanymorethanahumanstatueuntilthethreathaspassed. Hoatzin磨雉 Holdyournoseandmeetthehoatzinabirdofdistinctionsnottheleastofwhichisthatitsmellslikefreshcowshit.Theanimalmostlyeatsleavesandit'stheonlybirdknowntodigestbyfermentationlikeacow.Thisprocessiswhatcausesitssmellandhasearneditthenicknamethestinkbird. Millipedes千足虫 Millipedesaretricky.Forstarterstheylookwormy.TheirnameisdeceptivetooTheirlegsnumberabout750.Theirmajordefenseistocurlupintoaball.Theythoughalsoreleaseaharmeyesandleaveahorriblesmellontheirattackers. SeaHare海兔 Thegracefulseahareisplainintasteinthefirstplacesoit'snotthemostpopulardishintheseafoodchain.Nonethelessthistypeofseacreaturehasaprettycreativesmell—relateddefensethatisalmosttheoppositeofitssmellycompanionsonthislist.Theseaharegivesoutaslimypurpleinkthesubstancewhichmakesfoodlesspalatabletopredators. Researchersusinglobsters2—fasmodelpredatorsfoundthattheseablocksthelobstersreceptivemechanism.Inotherwordstheseaharegivesitsattackertheequivalentofastuffynosesotheydon'tknowhowappealingitis. 1Theseaharedefendsitselffrompredatorsby. A.becomingplainintasteatthediscoveryofapredator B.givingoutpurpleinktomakeitselfinvisibletopredators C.releasingsubstancetomakepredatorsunabletosmellit D.givingoffsmellygastotrytodrivepredatorsaway. 2WhichofthefollowingstatementsisTRUEaccordingtothepassage? A.Thevulturecarriesbacteriasothatpredatorsdarenotgetclosetoit. B.Theopossumfakesitsdeathtoavoidbeingtargetedbypredators. C.Thehoatzineatscowshitsothatitisnick—namedasstinkbird D.Thegasreleasedbymillipedewasbasicallyharmless 3Thespeciesthatenjoysmorethanonedefensemechanismis A.vulture B.opossum C.millipede D.seahare
我想当时你一定具有控制自己行为的能力.power
Fromthenation'searliestdaysfarminghasheldacrucialplaceintheAmericaneconomyandculture.Farmersplayanimportantroleinanysocietyofcoursesincetheyfeedpeople.Butfarminghasbeenparticularly1intheUnitedStateswithintensifiedattentionfromciviliansandgovernmentaswell. Earlyinthenation'slifefarmerswereseenasexemplifyingeconomic2suchashardworkperseveranceandself—sufficiency.MoreovermanyAmericansparticularlyimmigrantswhomayhaveneverheldanylandinthecountryfoundthatowningafarmwasthe3toentertheAmericaneconomicsystem.Theywereimmediatelyplayingapartinthecountry'seconomy. TheAmericanfarmerhasgenerallybeenquitesuccessfulatproducingfood.Indeedsometimeshissuccesshascreatedhisbiggestproblemtheagriculturalsectorhassufferedperiodicexplosionsofoverproductionthathave4prices.Whenthegovernmenthavetostepinand5theworstoftheseevents. Americanfarmersowetheirabilitytoproducelargeyieldstoanumberoffactors.Foronethingtheyworkunder6naturalconditions.TheAmericanMidwesthassomeoftherichestsoilintheworld.Rainfallis7overmostareasofthecountryriversandundergroundwaterpermitextensiveirrigationwhereitisnot. Increasinguseofhigh—quality8laboralsohavecontributedtothesuccessofAmericanagriculture.Itisnotunusualtoseetoday'sfarmers9plowsorharvesters.Onefarmercanmanagelargelandsoffarms.Fertilizersandpesticidesarecommonlyusedalthoughsomeenvironmentalists10it.Computerstrackfarmoperationsandeven11technologyisutilizedtofindthebestplacestoplantandfertilizecrops.USagricultureisamongthemostadvancedintheworld. Farmersstillfightwithforcesbeyondtheircontrol12.DespiteitsgenerallybenignweatherNorthAmericaalsoexperiencesfrequentfloodsanddroughts.Changesintheweathergiveagricultureitsowneconomiccyclesoften13thegeneraleconomy.Whennegativefactorshitfarmerscallsforgovernmentassistanceareparticularlyintense.Inthe1930sforinstancebadweatherandtheGreatDepressioncombinedtopushfarmsovertheedgeintoan14situation.Thegovernmentrespondedwith15agriculturalreforms——mostnotablyasystemofpricesupportswhosesignificancetowardthelarge—scalecampaignlastedformanyyears. 1Avalued B.accessed C.implemented D.illustrated 2A.regulations B.virtues C.obligations D.requirements 3A.shortcut B.implication C.reward D.substitute 4A.maintained B.margined C.depressed Drefunded 5A.takeover B.coverupfor C.comeupwith D.smoothout 6A.varied B.favorable C.extreme D.visible 7A.moderate B.predictable C.timely D.acid 8A.labor Binvestment C.chemical D.landscape 9A.complicated B.flexible C.accessible D.executive 10Acriticize B.recall C.evaluate D.identify 11A.medical B.mobile C.space D.process 12A.forexample B.inall C.however D.additionally 13A.subjectto B.unrelatedto C.reducedto D.appliedto 14A.vague B.desperate C.isolated D.feasible 15A.struggling B.traditional C.sweeping D.permanent
A.Theanimalstosomeextentbecometoolstous. B.Althoughviolenceagainstzooanimalsisoftenreportedtheissueofanimalwelfarehasarousedlittleattentionrecently. C.Bytakingaselfieyoushowthatyou'repartofthatexperience. D.Thecomparisonbetweencagedanimalsandwildonesareappealingtopeople. E.Similarincidentsarearegularoccurrenceinnaturalsettings. F.Thecommonfactoristhatsomepeoplearenotrespectinganimal. Recentlyinthequestforaselfie自拍awomanclimbedovertheconcretebarrierofaJaguar美洲虎enclosureatWildlifeWorldZooArizona.Thejaguarrippedintoherarm.Bystanderspulledherawaybeforetheanimalcouldinjureherfurther.She'sfine—soisthejaguar. Thisisn'tthefirsttimeastoryofapersonactingrudelytogetclosetoawildanimalmadeheadlines.Lastyear.amanjumpedintoalionenclosureatazooforaclose—upphoto.1MultipletouristsinYellowstoneNationalParkhavebeenattackedbybison野牛whenthey'vegottentoocloseforaphoto. It'scommonsensenottogetclosetowildanimalsthatcanhurtyou.It'swhyzooshavebarriers—sometimesmultiplewalls—tokeeppeopleseparatedfromanimals.Signspostedeverywherestatetheobviouswarning.Keepyourhandsoffthecage. Yetanimalshavebecomelessrealtoussaysanenvironmentalist.Weseeexoticanimalsmostfrequentlyinmanagedsettingslikezoos.2Peoplearetryingtotakeadvantageoftheirraritytoshowoffonsocialmediaandignoretheirfierceness. Mediaoftennormalizeinteractionwithdangerousanimals.SeeingamanlikeLionWhispererKevinRichardsonregularlyplay—fightwithlionsonTVmaysendthemessagethattheseanimalsaren'tsodangerousafterall. Socialmediaarealsoperfectlypositionedtocontributetotheriseofanimalselfies.Gettinglikesandcommentsprovideinstantsatisfaction.Yourself—esteemactuallygetsatemporaryboost.Toholdontothatfeelingpeoplemaygotomoreandmoreextremestoshowcasethemostexcitingversionsofthemselves.Itmaynotbeenoughtogetaphotoofabeautifuldangerousanimalfromoutsideacage.3 People'scarelessapproachcanputtheanimal'ssafetyatriskaswell.Zooanimalsoftenmustbekilledtoprotectthepersonwho'senteredtheirspace.Infactthrill—seekersactivelyendangerthelivesofanimals.4withthezooenvironmenttheytakeitforgrantedthatanimalsarethereforpeopleignoringthefactthatanimalsandhumansarebothequalexistentsinthenature.
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