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一个棱锥的三视图如图所示，则该棱锥的外接球的表面积为（ ）
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高三下学期数学《》真题及答案
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已知一个几何体的三视图如图所示则该几何体的外接球的表面积为___________.
已知一个三棱锥的三视图如图所示其中俯视图是等腰直角三角形则该三棱锥的外接球的体积为_________
已知四棱锥P.－ABCD的三视图如图所示则该四棱锥的表面积为
某几何体的三视图如图所示则该几何体的外接球的表面积为____________.
已知三棱锥的三视图如图所示则它的外接球表面积为
16π
4π
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2π
一个棱锥的三视图如图所示则该棱锥的外接球的表面积为
32π
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一个三棱锥的三视图如右图所示其正视图左视图俯视图的面积分别是124则这个几何体的外接球的表面积为__
如图在三棱锥 P - A B C 中 ∠ A B C = 90 ∘ 它的三视图如图所示.1求该棱
某棱锥的三视图如图所示则该棱锥的外接球的表面积为
11π
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14π
已知一个三棱锥的三视图如图2所示其中俯视图是等腰直角三角形则该三棱锥的外接球体积为.
已知三棱锥的三视图如图所示则它的外接球表面积为．
16π
8π
4π
2π
如图所示一个三棱锥的三视图是三个直角三角形则该三棱锥的外接球的表面积为
已知正三棱锥P.－ABC的正主视图和俯视图如图所示则此三棱锥的外接球的表面积为
4π
12π
某三棱锥的三视图如图所示其侧左视图为直角三角形则该三棱锥外接球的表面积为
如图所示是一个三棱锥的三视图则此三棱锥的外接球的表面积为
3π
4π
5π
6π
如图所示一个三棱锥的三视图是三个直角三角形单位cm且该三棱锥的外接球的表面积为50πcm2则该三棱
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如图所示一个三棱锥的三视图是三个直角三角形单位 cm 则该三棱锥的外接球的表面积为_______
一个几何体的三视图如图所示则这个几何体的表面积与其外接球表面积之比为_______.
已知一个三棱锥的三视图如图所示其中俯视图是等腰直角三角形则该三棱锥的外接球的体积为_________
某棱锥的三视图如图所示则该棱锥的外接球的表面积为
11π
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14π
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Arecentsurveyshowsthatroughly85percentofpeoplefeelphysicalsymptomsofstress.1andtheywillhelpyoufeelmoreenergetictomorrow •Doubleyourchews Chewingisasuper-importantpartofthedigestionprocess.Chewingmakesiteasierforyourbodytobreakdownfoodandturnitintoenergy.Themostpropernumberofchewsperbiteisunclear.2.Itwillbeeasyforyourbodytobreakdownthefoodandstoreenergy. •Drinkonelesscupofcoffee Althoughcaffeineincoffeeblocksyourbrainfromreceivingadenosinewhichcausestirednessitdoesn'tstopyourbodyfromproducingit.Sooncethecaffeinedisappearsit'sthebuildupofadenosinethatcausesyoutocrashandreachformorecaffeinecreatingabadcircle.3butdrinkinglesscoffeecanhelpyoufeelmoreenergeticoverthelongterm. •Takeafewdeepbreaths Bynotbreathingdeeplyenoughyouendupsendingasignaltoyournervoussystemthatincreasesyouranxietyevenfurther.Changingyourbreathinghabitsbytakingafewlongslowbreathsthroughoutthedayreducesthestressresponsewhileenergizingyourcells.4Simplybreatheinthroughyournoseforacountofthreeandoutthroughyourmouthforacountofthree.Repeatasnecessary. •5 Takesometimetoreflectonthepositivebywritingdownthreethingsthatwentsmoothlyduringyourdayorjustitemsyoufeelgratefulfor.Thisexercisecanprepareyourmindforwhat'sgoingrightinyourlifehittingthebrakesonstressincreaseswhilehelpingtoprotectyourenergyreserves. A.Setdownwhatwentwelltoday B.Tryanexercisetoachievethis C.Reflectonyourdaysometimes D.Reducingyourrelianceonitsoundsscary E.Takealookatthesmallchangesyoucanmaketoday F.Shallowbreathingisoneoftheannoyingsideeffectsofstress G.Howeverit'sbeensuggestedthat25to40timeswillbebeneficial
Whileit'sthebooksthatmakealibrarybeinginlovelysurroundingsmayprovideinspirationandhelpyoutoworkalittlebitharder.Herearesomeofthecoolestlibrariesoftheworld. LibraryofBirmingham﹣BirminghamU.K. ThenewLibraryofBirminghamissaidtobenotonlyBritain'sbiggestpubliclibrarybutalsothelargestinEurope.DesignedbyDutcharchitectsthisreplacementfortheBirminghamCentralLibrarywasopenedin2013andhasawealthofresourceswithinitswallsincludingadultandkids'librariesmusiccollectionsaShakespeareMemorialRoomandevenagymroom.Gardenscrowntheroofwhilethechangingseasonsbringvariationsintheshadowsandreflectionsinside. NationalLibraryofFrance﹣ParisFrance TheNationalLibraryofFrancewhichnowcontainsanastonishingcollectionof30milliondatesbacktothe14thcenturyandthisroyallibrarywassetupattheLouvrebyKingCharlesV.ThelibrarywasmovedtoRuedeRichelieusitein1868withmajordesignworkcarriedoutbyFrencharchitectsHenriLabrousteandfollowinghisdeathJean﹣LouisPascal.Herethereadingroomsareeleganceitself.Therearemorethanjustbookstobefound. StateLibraryofNewSouthWales﹣SydneyAustralia ThepublicStateLibraryofNewSouthWalesholdsthehonorofbeingtheoldestinstitutionofkindinAustralia.ItwasoriginallytheAustralianSubscriptionLibraryin1826butitwasn'tuntil1942thatitspermanenthomewasready.DesignedbySydneyarchitectWalterLibertyVernonandcompletedin1910themagnificentsandstoneMitchellWingisoneofthearchitecturalhighlights. SeattleCentralLibrary﹣SeattleWashingtonUSA SeattleCentralLibrary'sdistinctivedesignensuresitstandsout.ArchitectRemKoolhaasisoneofthenamesattachedtoitsdesign.Architectssoughttoenvelopthe11﹣storybuildingwithalayeroftransparencyusingaskinofglassandmetal.Thefinishedarticlehousesabout1.45millionbooksandotherthingsaswellasmorethan400computersavailableforpublicuse.Thebuildingwhichopenedin2004wasincludedontheAmericanInstituteofArchitects'listofAmerica's150favoritebuildingsin2007. 1Whichofthefollowinglibraryhasthelongesthistory? A.LibraryofBirmingham. B.NationalLibraryofFrance. C.StateLibraryofNewSouthWales. D.SeattleCentralLibrary. 2WhatcanyoudoinLibraryofBirmingham? A.Attendaconcert. B.Actaplay. C.Takesomeexercise. D.Enjoynewtechnology. 3WhatdoNationalLibraryofFranceandSeattleCentralLibraryhaveincommon? A.Theyhavecomputersavailable. B.Theyweremovedtoanewplace. C.Theywonawardsforarchitecture. D.Theyweredesignedbymorethanoneperson.
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下列实验中为达到实验目的所采取的实验操作和原理解释均正确的是
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假定你是李华收到英国笔友George的邮件请你介绍中国家庭聚会的情况饮食时间活动等.请给他写一封邮件. 注意1.词数100左右 2.可适当增加细节以使行文连贯. DearGeorge Yours LiHua
25℃时向等物质的量浓度的Na2S和Na2CO3的混合溶液中滴加NiNO32溶液产生NiSNiCO3两种沉淀溶液中阳离子阴离子浓度关系如图所示[已知25℃时KspNiS＝3.0×10﹣19KspNiCO3＝1.0×10﹣7]．下列说法正确的是
Forthefirsttimein94yearsthePalaceMuseumhasextendeditsopeninghoursallowingthepublictocelebratetheLanternFestivalatnightintheancientpalace. About3000luckyvisitorsreceivedfreeticketsfromthegovernmentamong1wasZhangZhifua77-year-oldpublicsecurityvolunteer.It'samarkofgratitudeforhervolunteerwork.Itis21trueanhonortobegrantedthisspecialprivilegeZhangsaid. Toguaranteethe3safeofthepalacefestivalorganizers4planthisyear'sLanternFestivaleventusedLEDlightsratherthantraditionalpaperlanternsandredcandles.It'safascinatingeventforvisitorstoabsorb5theyinthefestiveatmosphereinthemuseum.DiscussionofthePalaceMuseum'snewlooklitupsocialmediafollowingTuesday'sdisplay. SincehebecamedirectorofthePalaceMuseumShanJixiang6bringmanychangestotheworld's7largeimperialcomplex建筑群.Onceinaspeechthe64-year-olddirectorsharedhisideaabouthowtomaketraditional8treasurecomealiveagain.Hesaid9matterstoamuseumisnothowmanyvisitorstheyhavebuthowclosetheyare10people'sdailylives.
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三氯生常作抗菌剂的一种衍生物结构如图所示．关于该衍生物的说法不正确的是
常温下无水四氯化锡是一种无色易挥发易流动的液体遇水极易发生水解．某学习小组设计了如图所示的装置制备无水四氯化锡．其原理是Sns+2Cl2g＝SnC14l△H＝﹣511kJ•mol﹣1．请回答下列问题 1仪器a的名称是． 2装置B中反应的离子方程式是． 3装置C的作用是除去氯化氢所用试剂Ⅹ的名称是装置D的作用是． 4当F中快充满SnCl4时将生成的SnCl4排入接收器E中的操作是再用橡皮球从冷凝管上口向装置内吹气． 5SnCl4能溶解一定量的氯气若制取3kgSnCl4含氯气的质量分数为13.0%则至少需通入氯气的体积标准状况是m3保留2位小数． 6上述实验装置设计中还存在几处缺陷请指出其中任意一处．
铁元素是人体不可缺少的微量元素． 1基态铁原子价电子排布式为． 2KSCN可用于Fe3+的检验其对应的硫氰酸分子H﹣S﹣C≡N中σ键和π键之比为C原子的杂化方式为． K3FeCN6可用于Fe2+的检验其阴离子的配体是． 3不锈钢常含有铬Cr和镍元素． ①第一电离能的大小FeCr填“＞”“＜”或“＝”． ②已知Ni2+和Fe2+的离子半径分别为69pm和78pm根据岩浆晶出规则岩浆冷却过程中NiO和FeO中先结晶的是原因是． 4铁镁合金是目前已发现的储氢密度最高的储氢材料之一其晶胞结构如图所示． ①距离Mg原子最近的Fe原子个数是． ②若该晶体储氢时H2分子在晶胞的体心和棱心位置则含Mg96g的该储氢合金可储存标准状况下H2的体积约为L．
设NA为阿伏加德罗常数的值．已知C2H4和C3H6的混合物的质量为14g有关该混合物的说法错误的是
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.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. 修改在错的词下面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. WhenIwasveryyoungIstayedatmyhometownwithmygrandma.Shewasadiligentwoman.Shelikestogrowvegetablesortakescareofallthehouseworks.Thoughmyparentsoftenaskhertoquittheworkmygrandmaneverlisten.Shetakesthatshedoesashergreatjoy.IunderstandherbecauseIseehersmileandsatisfiedwithlife.Severalmonthsbeforemyfatherboughtforheranewsmartphone.AndduringtheSpringFestivalIinstructedheronhowemailandusetheInternet.AsidefromemailingshethinksitfeelsgreatlytotalktotheirgrandchildrenonWeChat.
化学与人类生活密切相关．下列说法正确的是
金属蚀刻加工过程中常用盐酸对其表面氧化物进行清洗会产生酸洗废水．pH在1.5左右的某酸洗废水中含铁元素质量分数约3%其他金属元素如铜镍锌铬浓度较低工业上综合利用酸洗废水可制备三氯化铁．制备过程如下 相关金属离子生成氢氧化物沉淀的pH如下表所示 回答下列问题 1“中和”时发生反应的化学方程式为调节pH至范围有利于后续制备得纯度较高的产品． 2酸溶处理中和后的滤渣使铁元素浸出．滤渣和工业盐酸反应时不同反应温度下铁浸出率随时间变化如图a所示可知酸溶的最佳温度为．按照不同的固液比滤渣和工业盐酸的投入体积比进行反应时铁浸出率随时间变化如图b所示实际生产中固液比选择1.51的原因是． 3氧化时可选氯酸钠或过氧化氢为氧化剂若100L“酸溶”所得溶液中Fe2+含量为1.2mol•L﹣1则需投入的氧化剂过氧化氢的质量为． 4氧化时除可外加氧化剂外也可采用惰性电极电解的方法此时阴极的电极反应式为电解总反应的离子方程式是． 5将得到的FeCl3溶液在HCl气氛中过滤洗涤干燥得FeCl3•6H2O晶体．
FeSO4是一种补血剂常温下久置易变黄一般认为是Fe2+被氧化为Fe3+的缘故． 1已知 ①Fe2+aq﹣e﹣＝Fe3+aq△H1＝akJ•mol﹣1 ②O2g+4e﹣+4H+aq＝2H2Ol△H2＝bkJ•mol﹣1 则FeSO4在酸性溶液中变质的热化学方程式为． 常温下配制不同pH的0．lmol•L﹣1FeSO4溶液研究溶液中Fe2+被氧化的情况结果如图所示假设反应过程中溶液体积不变． 2pH＝5.5的环境下反应在0～15min的平均速率vFe2+＝增大溶液pHFe2+被氧化速率填“增大”“减小”或“无影响”． 3平衡常数的计算中气态物质常以压强代替其浓度Fe2+在酸性环境下被氧化的平衡常数K的计算表达式是常温下该反应的平衡常数为2.5×1032L4•atm•mol4﹣1相对较大下列说法正确的是．填正确答案标号 a．Fe2+转化为Fe3+的趋势大b．Fe2+转化为Fe3+的速率大 c．反应进行得较为彻底d．酸性条件下Fe2+不会被氧化 4pH＝13的环境下Fe2+被氧化变质可以理解为 第一步Fe2++2OH﹣＝FeOH2↓ 第二步写化学方程式 当该氧化反应达到平衡时cFe2+/cFe3+4.0×1022填“＞”“＜”或“＝”．已知的Ksp[FeOH3]＝2.5×10﹣39Ksp[FeOH2]＝1.0×10﹣15． 5根据上述分析配制FeSO4溶液的正确方法是加入适量的铁粉和填试剂
Amaterialcanbereallyspecialwhenitwasnamedaftertheplacewhereit1createoriginally.That'certainlythecase2china.Andofalltypesofchinawhiteporcelain瓷isamongthemostfamous. Nowadaysthe3traditionmaterialhastakenonamodernlookinthe4handoffourChineseartistsintheModernWhitePorcelainExhibition.Andthekeywordhereismodern.Oneoftheworks5beaporcelainboat.Butlook6attentiveandyou'11seethattheboat7buildwithporcelainlookslikeatakeoutbox.Insidetheboatisastatueofababy.Thebabystandsforhumansandtheboatis8supportslife.Itsuggestswemayhavedonesomedamageto9environmentandthatwe'retreatinglifelikefastfood. Allthefourartistsgavewhiteporcelainamodemstyleeachin10theyownway.Andthisiswhattheexhibition'sthemecomesfrom.It'sadialoguebetweenthepastandthepresent.
Thereismoreofaconnectionbetweenfoodandculturethanyoumaythink.Onanindividuallevelwegrowupeatingthefoodofourculture.Itbecomesapartofwhoweare.Manyassociatefoodfromourchildhoodwithwarmfeelingsandgoodmemoriesandittiesustoourfamiliesholdingaspecialandpersonalvalueforus.Foodfromourfamilyoftenbecomesthecomfortfoodweseekasadultsintimesoffrustrationandstress. Onalargescaletraditionalfoodisanimportantpartofculture.Italsooperatesasanexpressionofcultureidentity.Immigrantsbringitwherevertheygoanditisasymbolofpridefortheircultureandmeansofcopingwithhomesickness. Manyimmigrantsopentheirownrestaurantsandservetraditionaldishes.Howeverthefooddoesnotremainexactlythesame.Somematerialsneededtomaketraditionaldishesmaynotbereadilyavailablesothetasteandflavorcanbedifferentfromwhattheywouldprepareintheirhomecountries.Additionallyimmigrantsdonotonlyselldishestopeoplefromthesamecountriesasthembuttopeoplefromdifferentcountries.Thereforetheyhavetomakesmallchangesabouttheoriginaldishestocatertoawiderrangeofcustomers.Thosechangescancreatenewflavorsthatstillkeeptheculturalsignificanceofthedishes. Weshouldembraceourheritage传统throughourculture'sfoodbutalsobecomemoreinformedaboutotherculturesbytryingtheirfood.Itisimportanttorememberthateachdishhasaspecialplaceintheculturetowhichitbelongsandisspecialtothosewhoprepareit.Foodisawindowintocultureanditshouldbetreatedassuch. 1What'sthefunctionoffoodmentionedinthearticle? A.Tohelpmotivatehomesickness. B.Toshownationalidentity. C.Toreflectacountry'shistory. D.Toshowacommunity'ssuperiority. 2WhatdoestheunderlineditinParagraph2referto? A.Thespecifictraditionalfood. B.Thenationalculture. C.Atraditionalexpressionoffood. D.Theold-fashionedtaste. 3Whydosomeimmigrantshavetochangetheoriginaldishesintheirrestaurant? A.Toattachculturalimportancetotheirdishes. B.Toannouncethebeginningoftheirlifeonforeignsoil. C.Tomakethedishespopularamongcustomers. D.Topresenttheirownfoodcultureinanewway. 4What'stheauthor'sattitudetowardsdifferentfoodcultures? A.Negative. B.Balanced. C.Unfair. D.Unchangeable.
SydneyStreetArtWalkingTour Youcangetamuchricherexperiencebytakinga2-hourwalkingtourinthecompanyofartistsanddesignerswhocanexplainthestoriesbehindthework.WanderthroughthestreetsofSydneyanddiscoveritsrichcultureofgraffitimuralismandtaggingwhilelearningabouttheartists.Meetandgetinsightfromlocalcharactersandtoasttheexperiencewithanincludedcraftbeer. SydneyBondiBeachWalkingTour ExperiencethesunsandandsurfatAustralia'smostpopularbeachwiththis1.5-hourwalkingtourofBondiBeach.SeewherethefamousBondiRescueTVshowisfilmedandlearnhowBondiBeachbecameahotspotfortouristssurfersandfamouspeople.AlongthewayadmiretheBondiAboriginalrockartsitesposeforphotosbytheBondiPavilion. SydneyVividLightWalkingTour MakethemostofVividLightSydney'sspectacularlightfestivalwiththissmallgroupwalkingtour.Overthecourseof2hoursyourlocalguidewillleadyouthroughthecity'sopen-airgalleryoflightequipmentstoppingatcelebratedworks.LearnabouttherichpastsofCircularQuayandTheRocksasyoumakeyourwaythroughthesehistoricneighborhoods. OperaHouseGuidedBackstageTour GetauniqueexperienceofOperaHouseonabackstagetourfortheperformingarts.Yourguidesharesstoriesaboutthereal-lifedramasbehindthecurtainandwell-knownhistory.Gobehindthescenestoseepartsoftheoperahousenormallyreservedforstaffandperformers.WrapupthisfascinatingmorningtourbysittingdownwithyourcompanionsforafullAustralianbreakfastintheGreenRoomwhereperformersrelaxbeforegoingonstage. 1Whocanhelpyouifyouwanttoappreciatethestreetart? A.Yourguide. B.Localpeople. C.Artistsanddesigners. D.Artstudents. 2WhatcanyoudoontheOperaHouseGuidedBackstageTour? A.Enjoyinterestingstories. B.Admiretherockartsites. C.WatchthefamousTVshow. D.Meetwell-knownperformers. 3Whichtourisbetterexperiencedduringthenight? A.SydneyStreetArtWalkingTour. B.SydneyBondiBeachWalkingTour. C.SydneyVividLightWalkingTour. D.OperaHouseGuidedBackstageTour.
化学与生产生活密切相关．下列物质的使用不涉及化学变化的是
WhilevisitingtheNorthpoleinwintermaynotbeatthetopofyourbucketlisttheever﹣changingICEHOTELwhichopeneditsdoorstovisitorsonDecember14thisyearmaychangeyourmind.200kmnorthoftheArcticCircleintheSwedishvillageofJukkasjārvithehotelwhichiscarvedentirelyfromiceisrebuiltannually. The35roomsbuilttoaccommodatevisitorsonallkindsofbudgetsvaryfromexpensivesuitestobasicroomsthatarefurnishedwithjustanicybedandareindeerskin.AmongthehighlightsthisyearistheSpruceWoodssuite.SculptedbyChristopherPascoeandJennieO'KeefeofCanadaitdescribesacampingscenecompletewithaclassicmicrobusaforestandevenanartificialcampfire. Thereisalsotheartfully﹣carvedLivingOceansuitetoremindvisitorsoftheimportanceofsavingouroceans.Theroomisfullofcarvedsealifethatincludescoralandasharkswimmingrightovertheicebed.Thesuiteisinspiredbyglobalwarmingandtheoverfishingthataffectsouroceans.saysartistJonathanPaulGreen.IalsothinktheideaofusingfrozenwaterfromariverinnorthernSwedentocreateanoceanwithshellsfishandcoralsisexciting. ThenearbyHavensuiteisamagicalgateoficeguardedbytwolargeanimals.WeareinspiredbythemeetingbetweenpeopleandwanttocreateanexperiencethatinvitescuriosityandcreativitysaysartistJonasJohansson.Itfeelslikeadreamtogettoworkwithicethatallowsourloveforlightshineandreflectiontowanderfreelyfromthoughttocreation. Regardlessofwhethervisitorsselectthecarvedsuitesorthebasiciceroomsthetemperatureisalwayssettoabone﹣chilling﹣5℃!Thatiswhyguestsareadvisedtosnuggle蜷缩upinsidesleepingbagsandwearglovesandwinterhatsallnight.Notsurprisinglymostendupspendingjustasinglenightatthisuniquehotelbeforemovingontotheconventionalandwarmerhotelsnearby. 1Whatdoestheunderlinedphrasebucketlistmeaninthetext? A.Ashoppinglistofbuckets. B.Alistoftravellingdestinations. C.Alistofexpensivehotels. D.Alistofexcitingideas. 2Whatcanweknowabouttheicehotel? A.Itisrebuilteveryyear. B.Itsroomsareexpensive. C.Itorganizescampingactivities. D.Itliesinacoastalcity. 3WheredoestheinspirationofLivingOceansuitecomefrom? A.Artandliterature. B.Oceanlifeandvoyage. C.Climatechangesandhumaninfluence. D.Themeetingofpeople. 4Whichofthefollowingisthebesttitleforthetext? A.AnAdventuretotheNorthPole B.AnExperienceClosetoNature C.ATasteofColdANightinaVillage D.AWinterDestinationSweden'sIceHotel
OnDec.6KelseyZwickboardedFlight588fromOrlandotoPhillywithLucyoneofher11-month-oldtwindaughters.Lucywasborn11weeksprematurely早产and1fromseverelungdiseaseasaresultofacomplication并发症ofthat.Thebravebabygirlwasonoxygen2untilrecently.TodayLucyneedsoxygenatnightandwhile3onesmallgooddeedremindedZwickhow4sheandherhusbandYuritrulyare. Tothe5in2D.Idon'tknowyoubutIimagineyousawus6.Iwaspushingastroller婴儿车hadadiaper尿布bagonmyarmandalso7anoxygenmachineformydaughterZwickwroteonherFacebookpost.We8theplanesatdowninourwindowseatandmade9tothosearoundusabouthavingtositbymyyelling-but-happybaby.Theflightattendantcameoverandtoldmeagentlemanwaswaitingto10seatsshewrote.Youweregivingupyourcomfortablefirst-classseattous.Notableto11tearsIcriedmywayupthe12whilemydaughterLucy13!Shefeltitinherbonestoo…realpuregoodness.Ismiledandthankedyouasweswitchedbutdidn'tgetto14youproperlythemomcontinued. So…thankyou.Notjustfortheseatitselfbutfor15.Forseeingusandrealizingthatmaybethingsarenot16easy.Fordecidingyouwantedtoshowarandomactof17tous.Ican'twaittotellLucysomeday.Inthemeantime…wewillpayit18. Zwick'sstorytouchedtheheartsofmanygivingriseto19commentsonthepostthathassincebeen20over164000times. 1A.recovers B.suffers C.results D.benefits 2A.test B.health C.survival D.support 3A.playing B.flying C.sleeping D.growing 4A.astonished B.amused C.blessed D.anxious 5A.man B.attendant C.assistant D.guide 6A.somewhere B.anywhere C.nowhere D.everywhere 7A.filling B.pumping C.following D.dragging 8A.booked B.reserved C.pre-boarded D.quit 9A.complaints B.comments C.offers D.jokes 10A.choose B.switch C.accept D.occupy 11A.burstinto B.giveback C.holdback D.breakinto 12A.passage B.airport C.flight D.pilot 13A.shouted B.crawled C.talked D.laughed 14A.meet B.thank C.recognise D.accept 15A.noticing B.donating C.reminding D.forgiving 16A.just B.right C.always D.ever 17A.forgiveness B.advantage C.kindness D.donation 18A.forward B.downward C.backward D.toward 19A.passive B.supportive C.possible D.negative 20A.made B.chosen C.researched D.shared
用Li石墨复合材料与Fe2O3纳米材料作电极的锂离子电池在循环充放电过程中实现对磁性的可逆调控．下列有关说法错误的是
IjustcountedhowmanyforeignlanguagesI'vestudiedsofarinmylifeandit'sbeentwelve! IalwaysfollowmyinterestsandfindwaystoputmylanguagelearningintothingsI'malreadyinterestedin.Iliketoreadblogs博客inotherlanguages.1.ForthemostpartbloggerstendtowritethesamewaytheyspeaksoIdon'thavetoworrymuchaboutadoptingstrangetermsthatareonlyusedinwriting. Moviesarealsoareallygoodtoolespeciallyifyoucanfindsubtitlesinthelanguageyou'relearning.2theywillstillkeepyourbrainlisteningandreadinginthesamelanguage.Musicisanotherwaytostartlisteningtothingsinyournewlanguage.PersonallyI'msobadatunderstandinglyrics歌词eveninEnglishsothisonedoesn'treallyworkformebutIhavefriendswholearnalanguagethroughlyrics.Gamesareofcoursealsoanexcellentwayofstudyinganewlanguage.Alotoflanguagelearningcomputerprogramsincludegames.I'msupercompetitiveandifIplayanyofthemIcanbehookedforhours.3. Whentheinitialexcitementoflearninganewlanguagebeginstofadeitcanbehardtostickwithit.ThehardestbitformeiswhenI'mcomfortableenoughwithalanguagetounderstandmostthingsandmakemyselfunderstood.I'mactuallystuckatthisstageinNorwegian.4.IdeallyIshouldsignuptotakeabiglanguageexam.EachtimeIstartgettingself﹣satisfiedit'stimetotakeanewcourseorsignupforonlinelessonsortakeupsomesortofchallengethatwillrequiremetolevelupmyskills. 5.ThebestlanguageclassI'veevertakenwasmybeginner'sRussiancourseatuniversitywheremyprofessorneverusedanyEnglish.ItgottothepointwhereIwouldkindofjustforgetaboutEnglishwhileinRussianclasswhichhelpedmetoreallyimmersemyselfintheRussianlanguageanddoawholelotwiththelimitedRussianIhad. A.That'sreallyuncomfortable B.Whateverlanguagesthey'retranslatedinto C.IalsotrytothinkinthelanguageI'mlearning D.It'stimewellspentifI'mlearningthelanguage E.Computergamesalwaysmakemefeelwornout F.Thoughtheydon'talwaysexactlymatchwhat'sbeingsaid G.Ifoundthemtheperfectlearningtoolbecausethey'reusuallywritteninorallanguage
AwomangraspedherphonetoherheartthewayaministermightholdaBible.Shewasanxioustotakeapictureofabunchofflowersthatsatnot10feetawaybutfirstshehadtogetthroughacrowdofotherspushingtodothesame.ThecauseofthiswasBouquetstoArtoneofthemostpopularannualeventsatthedeYoungMuseuminSanFrancisco.Forthe34thyearartistswereaskedtocreateflowerbunchesthatrespondtopiecesofartondisplayfromancientcarvingstocontemporarysculptures.It'stimetotakeaphototopostonInstagrambuttothepointthatithasbecomeaproblem. InrecentyearsthedeYoungreceivedmorethanathousandcomplaintsfrompeoplewhofeltthatcellphoneshadruinedtheirexperience.Infactinstitutionsoffineartaroundtheworldfacesimilarproblemsasthedesiretotakephotographsbecomesahugedrawformuseumsaswellassomethingthatupsetssomeoftheirvisitors.SothedeYoungrespondedwithakindofcompromisecarvingoutphotofreehoursduringtheexhibition'ssix-dayrun. Onecommoncomplaintintheongoingdebatesovertheeffectofsocialmediaonmuseumcultureisthatpeopleseemtobemissingoutonexperiencesbecausetheyaresobusycollectingevidenceofthem.ArecentstudyinthejournalPsychologicalSciencesuggeststhereissometruthtothisitfoundthatpeoplewhotookphotosofanexhibitratherthansimplyobservingithadahardertimerememberingwhattheysaw.Buttheissueiscomplicatedfortheprofessionalsrunningmuseums.LindaButlerthedeYoung'sheadofmarketingcommunicationsandvisitorexperienceacknowledgesthatnoteveryonewantsamuseumtobeaphoto-takingplayland.YetalotofotherpeopledoandshethinksthatthedeYoungisinnopositiontojudgethatonemotivationforbuyinga＄28ticketismorevalidthananother.Ifweremovedsocialmediaandphotographyshesayswewouldriskbecominglesspopular.Ifthisisabattlesignsindicatethatthepro-phonecrowd亲手机人群hasalreadywon. 1WhatwerethecrowdeagertodoinParagraph1? A.ToholdaBible. B.Toadmireflowers. C.Totakeaphoto. D.Toseetheexhibition. 2HowdidthedeYoungrespondtothecomplaints? A.Bysettingperiodswithoutphoto-taking. B.Bymakingtheexhibitionfreeofcharge. C.Bycompromisingwithotherinstitutions. D.Bygivingextratimetotakephotosfreely. 3Whatcanweinferabouttheuseofsocialmediainmuseumsaccordingtotherecentstudy? A.Ituncoversthetruth. B.Itaccumulatesevidence. C.Itcausescomplaints. D.Itplaysanegativerole. 4WhichofthefollowingmayLindaButlersupport? A.Cateringtovisitors. B.Reducingadmissionprices. C.Reservingjudgementinpublic. D.Banningsocialmediaandphotography.
微信热传的“苯宝宝表情包”可看作是由苯衍生的物质配以相应文字形成的如图．下列说法正确的是
室温下将1L0.3mol⋅L﹣1HA溶液与0.1molNaOH固体混合使之充分反应得到溶液a．然后向该溶液中通入HCl或加入NaOH固体忽略体积和温度变化溶液pH随通加入物质的量的变化如图．下列叙述错误的是
曾在南充求学和工作过的青年学者孙旭平及其领衔团队近日成功利用Mo2N纳米催化剂在0.1mol•L﹣1盐酸溶液中进行电催化固氮装置如图所示在一定电压下具有较高的产氨速率．下列判断错误的是
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