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已知某个几何体的三视图如图，根据图中标出的尺寸（单位：cm），可得这个几何体的体积是（ ）
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高三下学期数学《》真题及答案
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8分Evenplantcanrunafeverespeciallywhenthey'reunderattackbyinsectsordisease.Butunlikehumanplantscanhavetheirtemperaturetakenfrom3000feetawaystraightup.Adecadeagoadoptingtheinfrared红外线scanningtechnologydevelopedformilitarypurposesandothersatellitesphysicistStephenPaleycameupwithaquickwaytotakethetemperatureofcropstodeterminewhichonesareunderstress.Thegoalwastoletfarmersprecisely精确的targetpesticide杀虫剂sprayingratherthanrainpoisononawholefieldwhichalwaysincludesplantsthatdon'thavepestproblems. EvenbetterPaley'sRemoteScanningServicesCompanycoulddetectcropproblemsbeforetheybecamevisibletotheeye.Fixedonaplaneflownat3000feetatnightaninfraredscannermeasuredtheheatsentoutbycrops.Thedataweretransformedintoacolor﹣codedmapshowingwhereplantswererunningfevers.Farmerscouldthenspot﹣sprayusing50to70percentlesspesticidethattheyotherwisewould. ThebadnewsisthatPaley'scompanycloseddownin1984afteronlythreeyears.Farmersresistedthenewtechnologyandlong﹣termsupporterswerehardtofind.Butwiththerenewedconcernaboutpesticidesonproduceandrefinements改进ininfraredscanningPaleyhopestogetbackintooperation.Agricultureexpertshavenodoubtthatthetechnologyworks.Thistechniquecanbeusedon75percentofagriculturallandintheUnitedStatessaysGeorgeOertherofTexasA&MwhorecentlyretiredfromtheDepartmentofAgriculturethinksremoteinfraredcropscanningcouldbeadoptedbytheendofthedecade.ButonlyifPaleyfindsthefinancialsupportwhichhefailedtoobtain10yearsago. 1Plantswillgiveoutanincreasedamountofheatwhentheyare. A.facinganinfraredscanner B.sprayedwithpesticides C.exposedtoextremesunrays D.inpoorphysicalcondition 2Inordertoapplypesticidesprayingpreciselywecanuseinfraredscanningto. A.drawacolor﹣codedmap B.evaluatethedamagetothecrops C.locatetheproblemarea D.measurethesizeoftheaffectedarea 3Theapplicationofinfraredscanningtechnologytoagriculturemetwithsomedifficultiesof. A.thelackofofficialsupport B.itshighcost C.thelackoffinancialsupport D.itsfailuretohelpincreaseproduction 4Infraredscanningtechnologymaybebroughtbackintooperationbecauseof. A.fullsupportfromagriculturalexperts B.theforcefulpromotionbytheDepartmentofAgriculture C.thedesireoffarmerstoimprovethequalityoftheirproduce D.growingconcernabouttheoveruseofpesticidesoncrops
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8分TheotherdayIwasshoppingatthelocalChinesegrocerystore.Therewasalineatthefishcounterbutonlyonestaffpersonwastheretotakecareofthecustomers.Somecustomersorderedquiteanamountoffishforthatstaffpersontoworkon.AtlastIwasthesecondinlineallIwantedwasacoupleofcrabsandshouldgetoutofthereinnotime. Noticingitwasverybusyatthefishcounteranotherstaffpersoncameovertohelp.Iwasreadytobeservedbutthestaffpersonwenttotheendofthelineandbegantohelpacoupleofladieswithsnails蜗牛.ThecustomerinfrontofmebeingservedturnedaroundandlookedatmesympatheticallyandthecustomerbehindmecalledtothestaffpersonYoushouldstartherpointingatme.Hewaswellignored. IfsomeoneaskedmeWhatisthemostimportantruletofollowinAmerica?IwouldreplywithouthesitationWaityourturnatalltimes.Whereveryougohereinthiscountryyouwillfindpeoplewaitinginalinequietlytogetanythingwhetherinthesupermarketsdepartmentstoresbusstopsorgasstationsit'sjustamatterofwaitingyourturn.Inalargersensewaityourturnismorethanjustaguideline﹣itisaverybasicnorm准则thatreflectsthefundamentalvalueofthewesterncultures.Butinsomesituationsyourturndoesnotalwayscomebasedonwhenyougetthereandhowlongyouhavewaitedinlinejustlikemycaseatthestore.Eventhoughthisdidnotoftenhappenitdidmakemefeelupset. 1Whathappenedtotheauthoratthestore? A.Hewasn'tserveduponhisorder. B.Hewasill﹣treatedbyacustomer. C.Hewasaskedtobeservedlater. D.Hewasaskedtodoothersafavor. 2Whatistheauthor'sopinionaboutQueuingRule? A.Waituntilbeingserved. B.Servepeopleasonelikes. C.Waituntilyourturncomes. D.Firstcomelaterserved. 3Whatdoestheunderlinedwordthisinthelastparagraphreferto? A.Hisbelief. B.Hisexperience. C.Hisculture. D.Hisrule. 4Whydidtheauthorwritethetext? A.Toemphasizehiskindnesstoothers. B.Tointroducesomewesternculturestous. C.ToshowhisdisbeliefinQueuingRule. D.Toexpresshisbeliefandhisfeeling.
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已知双曲线﹣＝1a＞0b＞0的左右两个焦点分别为F1F2以线段F1F2为直径的圆与双曲线的渐近线在第一象限的交点为M若|MF1|﹣|MF2|＝2b该双曲线的离心率为e则e2＝
Tenminutesofgentleexercisecanimmediatelychangehowcertainpartsofthebraincommunicateandcoordinate协调withoneanotherandimprovememoryfunctionaccordingtoanencouragingnewstudy. Thescientistsinvited36peopleofdifferentagestothelabandhadthemsitquietlyonafixedbicyclefor10minutesoronaseparatevisitpedalthebicycleatapacesogentlethatitbarelyraisedtheirheartrates.Italsowasshortlastingforonly10minutes.Immediatelyaftereachsessionofthesittingorslowpedalingthepeoplecompletedacomputerizedmemorytestduringwhichtheywouldseeabriefpictureofforinstanceatreefollowedbyavarietyofotherimagesandthenanewimageofeitherthesametreeorasimilarone.Thepeoplewouldpressbuttonstoshowwhethertheythoughteachimagewasneworthesameasanearliershot.Thetestisdifficultsincemanyoftheimagescloselyresembleoneanother.Itrequiresrapidskillfulscanningrecentmemoriestodecidewhetherapictureisneworknown.Nextthescientistshadeachpeoplerepeatthisprocess﹣﹣ridingorsittingonthebikefor10minutesandthencompletingmemorytesting﹣﹣butthetestingnowtookplaceinsideanM.R.I.machine磁共振成像仪thatscannedthepeople'sbrainswhiletheyrespondedtotheimages. Thentheresearcherscomparedresults.Theeffectsoftheexercisewereclear.Thepeoplewerebetteratrememberingimagesaftertheyhadriddenthebikeespeciallywhentheimagesmostcloselyresembledoneanother.Inotherwordsthehardertheirmemorieshadtodotheirbestthebettertheyperformedaftertheexercise.TheM.R.I.scansshowedthatmemorypartsofeachpeople'sbrainlitupatthesametimewithpartsofthebrainassociatedwithlearningindicatingthatthesephysicallyseparatepartsofthebrainwerebetterconnectednowthanwhenthepeoplehadnotfirstexercised. 1Howdidtheresearchersconductthestudy? A.Byfillingupquestionnaires. B.Byinterviewingmanypeople. C.Bycomparingexperimentdata. D.Byreferringtohistoricalreports. 2Whomightbenefitmostfromthestudyresult? A.Themarketerspromotingfixedbicycles. B.Theyoungpeoplecrazyaboutbodybuilding. C.Thewhitecollarsdoinglong﹣termmentalwork. D.Theblue﹣collarsdoingheavyphysicallaborwork. 3Whichofthefollowingstatementsagreeswiththestudyresult? A.Thelightexerciseisonlygoodforyoungpeople. B.Themoretheexerciseisthebetterthebrainworks. C.Theexercisecancoordinatedifferentpartsofthebody. D.Theexercisehasmorepositiveeffectwhenthebrainworksharder. 4Whatcanbethebesttitleforthetext? A.Eventenminutes'exercisemaybegoodforthebrain B.Thereisnoneedforhumansdoingexerciseeveryday C.Onlytenminutes'lightexercisebenefitstheyoungmost D.Exercisecanchangepeople'sbrainsandmindsinalongtime
10分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处错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Iwenttotheseasidetospendingmysummerholidaywithmyfamily.Westayedthereforabouttwoweek.TheweatherwasmuchhotterthaninmyhometownbutIgotusedtoitorfeltathome.EverymorningIgotupearlythanmyparentsandwentforbreakfastaheadofthetime.ThenIwenttohaveachatwithmynewfriendJohnwhomIhappentocomeacrossduringmyholiday.Johnwasanativeandquitewarm﹣heartedlyandhewasfamiliartotheseaside.Soonwebecameverygoodfriends.Afterwepartedwehavekeptwritetoeachother.
已知抛物线Cx2＝2pyp＞0的焦点为F准线为l若点P在C上点E在l上且△PEF是周长为12的正三角形．1求C的方程2过点F的直线与抛物线相交于AB两点抛物线在点A处的切线与l交于点N求△ABN面积的最小值．
ChristmasisatimeforeatinggreatfoodgivingandreceivingpresentsandmostimportantlyspendingtimewithyourfamilywatchingsomeclassicChristmasmovies. TheGrinch2000 ThisisaChristmasmust﹣watchandoneofJimCarrey'sbestperformances.ItwasalsooriginallyanurserytalebookwrittenbyDrSeuss.It'sthestoryofagreenmonsterwhowantstoruinChristmasbutwhointheenddiscoversthepowerofloveandgenerosity.Ipromiseit'sagreatfilmwithplentyoflaughsalongtheway. LoveActually2003 WhilethisisnotapersonalfavouriteofminepeopleintheUKabsolutelylovethisfilm.Ithasmanyfeaturingactorsandactresses.ItmightbealittledifficulttofollowastherearecomplexplotssoIrecommendwatchingatranslatedversionorenablingsubtitles字幕inyournativelanguage.Howevertheheart﹣warmingelementsofthefilmmakeitworthwatching. HomeAlone1990 Thisamusingmasterworkisoneofmyfavouritefilmsofalltime.IttellsthestoryofaboyKevinwhoisleftaloneinhishousewhenhislargefamilyforgetstotakehimonvacationwiththem.WhilethefamiliesareawayburglarstrytorobthehouseandKevinmustprotecthishomebysettingtraps.Thetripsfallsandtrapswillhaveyoulaughingoutloudasyouwatcha10﹣year﹣oldboybeattwogrownmen. Miracleon34thStreet1994 Youcan'thaveChristmasinanEnglish﹣speakingcountrywithoutwatchingthismovie.It'snotfunnylikeHomeAloneorTheGrinchbutitisincrediblytouching.It'saboutamanwhoclaimstobeSantabutnobodybelieveshimexceptalawyerandalittlegirl.Thestory﹣linemayseemalittlechildishbutyoucanenjoyitatanyage. 1Whichfilmisadaptedfromafairytale? A.TheGrinch. B.HomeAlone. C.LoveActually. D.Miracleon34thStreet. 2WhatisHomeAlonemainlyabout? A.Anunsuccessfulfamilyvacation. B.Aboyprotectinghomebyhimself. C.Aterriblesufferingtoalittleboy. D.A10﹣year﹣oldboy'spracticaljokes. 3WhyisMiracleon34thStreetsopopular? A.Owingtoitsmovingplots. B.Becauseofitsfunnystory. C.Duetoitschildishstoryline. D.Foritsfamousactorsandactresses.
如图1是某省2019年1～4月快递业务量统计图图2是该省2019年1～4月快递业务收入统计图其中同比增长率指和去年同期相比较的增长率．下列对统计图理解错误的是
假定你是李华正利用暑假在北京的EnglishLanguageCenter学习英语.你的美国朋友Sandy来信询问你的近况请你用英语给她回一封信内容包括 1.因为很久没有给Sandy回信而向她道歉 2.介绍自己学习的情况 3.介绍自己在生活中遇到的困难. 注意1.词数100左右 2.可根据内容要点适当增加细节以使行文连贯.
TheTruthaboutWhisky Whiskyisprobably1mostfamousproductofScotland.Whiskymakingprovideswork2severalthousandpeopleintheScottishHighlandsandislandsandwhiskyisScotland'sbiggestgoods3selltoeverycorneroftheworld. Thequalitiesofwhiskycomefromthewaterwhich4usetomakeittherichpeaty多泥炭的waterofScotland.Whenwhiskyisfirstmadeitis5actualclear notbrownincolour.Thecolourcomesfromthewooden6containerinwhichthewhiskyisstoredforseveralyearstoallowit7maturefromalittleaddedsugar. FormanyyearswhiskyhasbeenoneofthemostpopulardrinksallovertheworldandScotland8producemoreandmoreofitsofar.ButwhiskysaleshavenotincreasedasfastsotherearenowlargereservesofwhiskyinScotlandespeciallythebetterand9muchexpensivewhisky.Soalotofthewhiskysoldtodaywasmadeseveralyearsagowhenpeoplethoughtthatwhiskywouldgetmoreandmorepopular.Thatis10todayalotofthewhiskyintheshopsismarkedwithTenyearsoldorevenFifteenyearsold.
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