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在平面直角坐标系中,已知x轴上一点A(2,0),B为y轴上的一动点,连接AB,以AB为边作等边△ABC如图所示,已知点C随着点B的运动形成的图形是一条直线,连接OC,则AC+OC的最小值是 . ...
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如图在平面直角坐标系xOy中点A.的坐标为20以点A.为圆心2为半径的圆与x轴交于O.B.两点C.为
在如图所示的平面直角坐标系中点P.是直线y=x上的动点A.10B.20是x轴上的两点则PA+PB的最
在平面直角坐标系中二次函数y=﹣x2+6x﹣9的图象顶点为A与y轴交于点B.若在该二次函数图形上取一
(﹣9,0)
(﹣6,0)
(6,0)
(9,0)
已知等腰△ABC以底边BC所在直线为x轴以底边BC的垂直平分线为y轴建立直角坐标系若B点坐标为﹣20
有下列叙述①在空间直角坐标系中在x轴上的点的坐标一定可记为0bc②在空间直角坐标系中在y轴上的点的坐
在平面直角坐标系XOY中有A32B﹣1﹣4P是X轴上的一点Q是Y轴上的一点若以点ABPQ四个点为顶点
已知直角坐标系内有一点M.ab且ab=0则点M.的位置一定在
原点上
x轴上
y轴上
坐标轴上
在直角坐标系中已知M21和直线L:x-y=0试在直线L.上找一点P在X.轴上找一点Q使三角形MPQ的
在如图所示的平面直角坐标系中点P.是直线y=x上的动点A.10B.20是x轴上的两点则PA+PB的最
在平面直角坐标系中点A.的坐标为30点B.为y轴正半轴上的一点点C.是第一象限内一点且AC=2.设t
在平面直角坐标系中点
(-3,0)在( ) A.x轴正半轴上
x轴负半轴上
y轴正半轴上
y轴负半轴上
在平面直角坐标系中点A.的坐标为30点B.为y轴上的一点点C.是第一象限内一点且AC=2设tan∠B
平面直角坐标系中在x轴的下方有一点M点M到x轴的距离为5到y轴的距离为7则点M的坐标为_______
在如图所示的平面直角坐标系中点P是直线y=x上的动点A10B20是x轴上的两点则PA+PB的最小值为
在如图所示的平面直角坐标系中点P.是直线y=x上的动点A.10B.20是x轴上的两点则PA+PB的最
如图所示在平面直角坐标系中已知A.01B.20C.43.1在平面直角坐标系中画出△ABC并求△ABC
在如图所示的平面直角坐标系中点P.是直线y=x上的动点A.10B.20是x轴上的两点则PA+PB的最
在平面直角坐标系内过反比例函数y=k>0的图象上的一点分别作x轴y轴的垂线段与x轴y轴所围成的矩形面
已知曲线C的极坐标方程为4ρ2cos2θ+9ρ2sin2θ=36以极点为平面直角坐标系的原点极轴为x
在平面直角坐标系中已知直线y=-x+3与x轴y轴分别交于
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只用下列方法不能把下列物质区分开的是
近日在重庆“服役”51年的牛角沱嘉陵江大桥开始大修了这座跨越了半个多世纪的大桥是重庆主城首座城市大桥也是市级文物保护单位.其中大桥桥面部分的施工是大修工程的重点之一主要是进行行车道板改造.工程将拆除桥面现有的混凝土行车道板更换为钢桥面板.请回答下列有关问题 1钢桥面板的主要材料合金填“是”或“不是”选择该材料的原因是填字母序号. A.密度大B.硬度大C.导热性好 2桥梁外表面由于处于潮湿和酸性大气中容易腐蚀生锈.请写出用稀硫酸清洗铁锈的化学方程式. 3如果你是桥梁维护人员请说出一种防止钢铁生锈的方法.
化学变化有时也是五彩斑斓的下列哪些反应不涉及颜色的变化
水与人类的生产生活息息相关下列有关水的说法正确的是
MoneyspentonadvertisingismoneyspentaswellasanyIknowof.Itservesdirectlytoassistarapiddistributionofgoodsatreasonablepricestherebyestablishingafirmhomemarketandsomakingitpossibletoprovideforexportatcompetitiveprices.Bydrawingattentiontonewideasithelpsenormouslytoraisestandardsofliving.Byhelpingtoincreasedemanditensuresanincreasedneedforlabourandisthereforeaneffectivewaytofightunemployment.Itlowersthecostsofmanyservices:withoutadvertisementsyourdailynewspaperwouldcostfourtimesasmuchthepriceofyourtelevisionlicensewouldneedtobedoubledandtravelbybusortubewouldcost20percentmore. Andperhapsmostimportantofalladvertisingprovidesaguaranteeofreasonablevalueintheproductsandservicesyoubuy.Apartfromthefactthattwenty﹣sevenActsofParliamentgovernthetermsofadvertisingnoregularadvertiserdarepromoteaproductthatfailstoliveuptothepromiseofhisadvertisements.Hemightfoolsomepeopleforalittlewhilethroughmisleadingadvertising.Hewillnotdosoforlongformercifullythepublichasthegoodsensenottobuytheinferiorarticlemorethanonce.IfyouseeanarticleconsistentlyadvertiseditisthesurestproofIknowthatthearticledoeswhatisclaimedforitandthatitrepresentsgoodvalue. AdvertisingdoesmoreforthematerialbenefitofthecommunitythananyotherforceIcanthinkof. ThereisonemorepointIfeelIoughttotouchon.RecentlyIheardawell﹣knowntelevisionpersonalitydeclarethathewasagainstadvertisingbecauseitpersuadesratherthaninforms.Hewasdrawingexcessivelyfinedistinctions.Ofcourseadvertisingseekstopersuade. Ifitsmessagewereconfinedmerelytoinformation﹣andthatinitselfwouldbedifficultifnotimpossibletoachieveforevenadetailsuchasthechoiceofthecolourofashirtissubtlypersuasive﹣advertisingwouldbesoboringthatnoonewouldpayanyattention.Butperhapsthatiswhatthewell﹣knowntelevisionpersonalitywants. 1Bythefirstsentenceofthetexttheauthormeansthat. A.heisfairlyfamiliarwiththecostofadvertising B.everybodyknowswellthatadvertisingismoneyconsuming C.advertisingcostsmoneylikeeverythingelse D.itisworthwhiletospendmoneyonadvertising 2InthetextwhichofthefollowingisNOTincludedintheadvantagesofadvertising? A.Securinggreaterfame. B.Providingmorejobs. C.Enhancinglivingstandards. D.Reducingnewspapercost. 3Theauthorthinksthatthewell﹣knownTVpersonalityis. A.verypreciseinpassinghisjudgementonadvertising B.interestedinnothingbutthebuyers'attention C.correctintellingthedifferencebetweenpersuasionandinformation D.obviouslypartialinhisviewsonadvertising 4Intheauthor'sopinion. A.advertisingcanseldombringmaterialbenefittomanbyprovidinginformation B.advertisinginformspeopleofnewideasratherthanwinsthemover C.thereisnothingwrongwithadvertisinginpersuadingthebuyer D.thebuyerisnotinterestedingettinginformationfromanadvertisement
下列图象能正确反映其对应操作的是
假如你在友好学校CloverportSchool夏令营期间观摩了当地小镇的一个节日活动请根据其中的一项活动宣传单完成一则英文报告.每空限填一词. Helloeverybody!I'msogladtoexperiencetheSacajawea1inthetownofCloverport.It'sacommunityfestivaltobringpeopletogether.TeenMr.Cloverportisacompetitionfor2fromthirteentosixteenyearsold.MynewfriendTristanpaid3dollarstoenterit.Hewasreallyexcitedaboutit.Theyhavetowearhomemadeclothesinsteadofthoseboughtfroma4.IthinkthespiritofDIYreallymatters.Tofollowtherulestheyarenot5tosmokedrinkwineorspeakrudely.Theyshouldbewell﹣behaved.Thankyou!
如图是向氢氧化钠溶液中加入稀盐酸反应的微观示意图以下说法错误的是
Itwasourschool'syearlydancingshow.I1beexcitedthatIwaschosenbytheteacherthistimealthoughIdidn'thaveanyexperienceofdancingforashow.Iwoulddanceinfrontofallthestudentsand2teacher.Itmademeveryproud. HoweverIwasabitsad3myfatherhadnotimetowatchmedance.He4invitetohaveabusinessmeeting.Iknewthatmyfatherwouldsurelycometomyshowifhecould.5luckymymotherandmyeldersisterwerestillcomingtowatchmyshow. 6thebeginningofthedayIwasverynervous.AfterchangingintothedressandgettingmymakeupdoneIfelt7relax.ThenIwentontothestagebravely.Iwasverygladtoseemymotherandsistersittingin8secondrow. JustbeforethelightsturneddarkIsawmyfatherrushintothehallandtaketheseatbesidemymother.9apleasantsurpriseitwas!Thesightofmyfathermade10Ismile.Ibegandancingconfidently.Soonaftertheshowmyfamilycamebackstagetocongratulateme.Iwassohappyandluckytohavemyfamily'ssupport.
某同学去医院检査身体医生建议他多吃“水果和蔬菜”你推测医生的意图是让该同学补充
Theworldhasaplasticsproblem.Andnotjustwithbottles.Straws吸管toothbrushestoys﹣allkindsofplasticsareplacedinlandfills.Thereare5billiontonsofplasticwasteintheworld.Landfillshavealargepartofit.By2050theycouldhave13billiontons. Muchofplasticrubbishfindsitswayintotheocean.Scientistssay165milliontonsofplasticpiecesarefloatingaroundoutthere.Andmostplasticwon'tdisappearitself.Itwillremainintheoceanforever.Whalesgetcaughtinplasticfishingnets.Birdsdiebecauseofeatingplasticstrawsandbottlecaps.Itendangersoceanlife.Plasticrubbishevenendsupinthefoodweeat. Governmentsarerealizingthatrecyclingmaynotbeenough.Theyaretakingmoreactions.Thoughitishardworkitisstillasolvableproblem.InBritainpeoplearenotallowedtouseplasticbagsexceptinhospitals.ScotlandandseveralcoastalcitiesintheUSstoppeoplefromusingplasticstrawsaswell.TheUSalonethrowsawaysome500millionplasticstrawsaday.That'senoughtocircletheEarthtwice.SayingnotoaplasticstrawisaneasywaytomakeabigdifferenceDanaLofflinwhostartedsaid.Dowereallywanttopassontoourchildrenaworldharmedbyplastic? Peoplehavefoundsometastywaystoreducewaste.AcompanyinIndiamadethefirst﹣everspoonthatpeoplecaneat.Youdon'thavetoeatthespoon.Youcanthrowitaway.Itdecomposes分解injustafewdays.DavidEdwardsascientistatHarvardUniversitydesignedaneatablebagwhichcanprotectthefoodordrinkinside.Itisadeliciousreplacementforplasticones. 1Accordingtothewritebirdsdiebecausethey. A.eatbottlecapsandstraws B.getcaughtinfishingnets C.feedonoceananimals D.havethespoonsinIndia 2TheunderlinedwordendangersinParagraph2probablymeans. A.brings B.loses C.harms D.saves 3Thepurposeofthepassageismainlyto. A.introducesomewaystorecyclewaste B.tellreadersabouttheproblemwithplastics C.compareairpollutionandplasticpollution D.describehowtheUSisreducingplasticwaste 4Fromthepassagewecantellthattheplasticsproblem. A.istoobigforpeopletosolve B.canbesolvedbyrecyclingalone C.canbesolvedbutitwontbeeasy D.willhavetobesolvedbyfuturescientists
小明同学设计了如下实验方案分离NaCl和CaCl2两种白色粉末的混合物W请回答下列问题 1试剂A的化学名称是. 2操作Ⅱ需要用到除烧杯玻璃棒之外的玻璃仪器还有. 3沉淀B洗涤后加入稀盐酸的化学方程式是该反应的反应类型是.
Jealousofthekidsatschoolwhoaresmarterthanyouandseemtolearnmorequickly?Don'tworry.1 2HoweveraccordingtoarecentstudyIQcanrise﹣﹣notjustbyoneortwopointsbutbyasmanyas21points! ScientistshavefoundthatIQchangesarelinkedtochangesinpartofthebraincalledgraymatterwhichwasseentogrowandbecomedenserinthebrainsofpeoplewhoseIQsimprovedgreatly.3Oneistotrainyourshort﹣termmemory.Previousresearchhasproventhatshort﹣termmemoryisthebasisforintelligencesotryingtorecognizeorretellsomethingthatyouhaveseenorheardcanhelpraiseyouroverallbrainpower.4 Agoodnight'ssleepwillalsohelpimproveyourconcentration.5Ithelpsyoustayfocusedforlongerthenextday. Scientistshavealsofoundthatexercisehelps.Walking30minutesadayfivetimesaweekanddoingexercisewillhelpyoubecomemoreknowledgeableaswellashealthierandfitter. A.Thereareseveralwaysofincreasingyourbrain'sgraymatter. B.Yourbraindealsmoreefficientlywiththingsyoutrulylike. C.Withabitofbraintrainingthechancesarethatyoucanbeassmartastheyare. D.Somaybeit'sagoodideatogetyourbrainintrainingrightaway. E.Gettingenoughsleepislikepushingtheresetbuttoninyourbrain. F.Themoreyouworkonitthebetteryouwillbecome. G.Peopleusedtoassumethataperson'sIQwasunchangeable.
菠菜中含有草酸将草酸晶体隔绝空气加热使其完全分解生成水和碳的氧化物.为了探究上述反应生成的碳的氧化物成分同学们提出以下猜想. 1猜想与假设 猜想一只有CO猜想二只有CO2猜想三 2某同学设计了如图1所示实验验证猜想 ①无水草酸晶体熔点较低加热到182℃便开始熔化189.5℃分解.根据此信息你应选择的加热装置为图2中填“A”或“B” ②该装置中乙的作用为末端气球的作用为 ③实验中下列操作的先后顺序是 a.点燃加热装置中的酒精灯b.点燃丙处的酒精喷灯c.检查装置气密性d.装入药品 ④若甲试管和丁试管内溶液都变浑浊丙处玻璃管内的黑色固体变成红色则猜想正确.
1TotallyWildHotelisspecialbecauseof. A.itshighprice B.itsgoodbreakfast C.thelovelygiraffes D.theoldbuildings 2AccordingtothetextpeoplecaninKenya. A.cheeroncamelsinLamuOldTown B.havebreakfastwithzebrasinTotallyWildHotel C.seelionszebraselephantsinEastNationalPark D.watchthebrightpinkbirdsnearLakeNakuru 3willmostprobablybeinterestedinthetextabove. A.Peoplewhoenjoytravelling B.Scientistswhostudybirds C.Playerswhoaregoodatrunning D.Peoplewhohaveapainintheneck
氯碱工业是指用电解饱和NaCl溶液的方法来抽取NaOHCl2和H2并以它们为原料生产一系列化工产品电解饱和NaCl溶液的化学方程式为2NaCl+2H2OCl2↑+H2↑+2NaOH 请计算 1烧碱中三种元素的质量比为. 2用这种方法制备40t烧碱需要食盐的质量. 3若用25%的食盐溶液按照上述方法电解并制取40t烧碱完全电解后所得溶液的质量分数.假设生成的烧碱全溶计算时若除不尽保留1%
在宏观微观和符号之间建立联系是化学学科的特点. 1某物质由氢元素和氧元素组成其分子中原子个数比为11该物质发生分解反应的化学方程式为. 2根据常见元素和原子团的化合价下列四种物质的化学式书写不正确的是. A.氧化钠Na2OB.氧化铝AlOC.硫酸钠Na2SO4D.氯化铁FeCl2 3镁钠铝三种金属的活动性由强到弱的顺序是请写出铝离子的离子结构示意图.
生活中处处都有化学下列说法正确的一项是
假定你是李华你校英文报心理与健康栏目拟刊登一篇文章为高三备考的学生如何安排课余生活和释放心理压力提出建议.请你为此栏目写一篇英语短文要点如下: 1.高三学习的挑战和困难 2.如何安排课余生活 3.如何释放心理压力 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯; 3.开头语已为你写好. LifeinSeniorThreeisnoteasy.
硫酸和盐酸既是实验室常用的试剂也是重要的化工原料.它们既有相似之处又有不同之点. 1它们水溶液的pH都7填“大于”“小于”或“等于”. 2它们都能除铁锈写出盐酸与铁锈主要成分反应的化学方程式. 3它们都能与碱反应生成盐和水该类反应叫反应. 4打开两瓶分别盛有浓硫酸和浓盐酸的试剂瓶瓶口出现白雾的是.
如图是甲乙丙三种固体物质的溶解度曲线.下列叙述错误的是
InthesmalltownsoftheUnitedStatesinthe1nineteencenturythegeneralstorewas2everyoneboughtthethingshecouldn'tmake3growathome.Whatthestoressold4tellagreatdealabout5lifeatthattime.Peopleboughttoolsthattheyneededforfarmwork;saltsugarand6foodsthatthefarmdidn'tproduce;articlesofclothingthattheycouldn'tmake7;shirtsforthemen;orclothesforthechildren.Lifewassimplethen.Onefeelsthatpeoplewere8thankforwhattheyhadandthattheylookedforwardwithcourageto9thefuturebrought.Itwouldbeinterestingtoknowhowtheywouldfeelaboutthelifetoday.Woulditseemtothemthatlifeistoocomplex?Wouldtheyenjoy10livealifeaswedonow?
MoviefansknowthattheiractionheroSupermandoesnotreallyfly.AndinthemovieSupermanReturnsanothervisualtrickisplayedonviewers.Themantheyseeflyingisnotreal.Heiswhatiscalledavirtualactor.Thefirststepincreatingthisdigitalactoristohavearealpersonstandinaroomcalledalightstage.Acomputerthencapturestheoutlinesandshapesofhisfaceandrecordshowtheythrowofflight.PaulDebeveciswiththeInstituteforCreativeTechnologiesattheUniversityofSouthernCalifornia. Wecanlightthemwithveryspeciallycomputer﹣controlledillumination照明andtakephotosofthemfromsevendifferentviewpointswithhighqualitydigitalstillcameras. Mr.Debevecispartofateamworkingtocreatecomputerizedimagesofpeopleobjectsandenvironmentsthatlookandactreal.ThelightstagepermitsactorstobeturnedintodigitalversionsofthemselvesmuchlikethebluecreaturesinthemovieAvatar.Therealworldcouldsoonbeusingasimilartechnology.ComputerexpertsattheInstitutearedevelopinga3﹣Dvideoteleconferencingsystem.Itwouldsendavideoimageofapersonintoameetingroom.Thatimagewouldbeabletoworkwiththepeopleintheroomwhowouldseeitin3﹣Dwithoutspecialeyeglasses.PaulDebevecsays: Thepersonwhoisbeingtransmittedtoaremotelocationcanactuallylookaroundatthepeopleintheroomandeverybodyinthatroomknowswhothey'relookingat.Andthat'ssuchafundamentalpartofhumancommunication. Hebelievesthebusinessworldwillbegintouse3﹣Dvideoteleconferencinginthenextfiveyears.It'salsoamediumwithwhichyoungpeopletodayareparticularlycomfortablehesaid.Ademonstrationofaninteractionbetweenanearthquakesurvivorandstudentsmaybepossibleinayear.In10yearswemaybeabletoplay3﹣Dvideogameswithoutspecialglasses. 1WhydoestheauthormentionthemoviesSupermanReturnsandAvatarinthepassage? A.Tocomparetheirdifferentstyles. B.Toexplain3﹣Dfilm﹣makingtechnology. C.Toattractmorereaderstowatch3﹣Dfilm. D.Todescribetheoriginof3﹣Dfilmindustry. 2Whichofthefollowingshowshowavirtualactorismade? a.arealactorstepsinsidealightstage. b.anactoriscreatedintodigitalversion. c.photosaretakenfromdifferentaspects. d.howtheactor'sfacereflectsthelightisrecorded. e.acomputermakessurehowtheactor'sfaceisfilmed. A.a→e→d→c→b B.a→c→e→d→b C.a→e→c→f→b D.e→d→c→a→b 3Whatistheauthor'sattitudetowards3Dtechnology? A.Cautious B.Positive C.Skeptical D.Critical 4What'sthemainideaofthetext? A.3﹣Dgoesfrommoviestorealworld. B.3﹣Dfilmbecomespopularworldwide. C.3﹣Dteleconferencingsystemcomesintobeing. D.3﹣Dgameswithoutspecialglassesbecomestrue.
ScientistsinArgentinahavecreatedtheworld'sfirstcowwithtwohumangenesthatwillenableittoproducehuman﹣likemilk. Geneticengineeringwasusedtointroducethemothers'milkgenesintotheanimalbeforebirthaccordingtotheNationalInstituteofAgribusinessTechnologyinBuenosAires. Asanadulttheclonedcowwillproducemilkthatissimilartohumansinwhatwillproveadevelopmentofgreatimportanceforthenutritionofinfantssaidtheinstitute.TheclonedcownamedRositaISAisthefirstintheworldthatincorporatestwohumangenesthatcontaintheproteinspresentinhumanmilksaidthestatement. TheArgentineteamsaidtheChineseonlyintroducedonehumangenewhiletheirresearchinvolvedtwomeaningthemilkwillmorecloselyresemblethatofhumans. Ourgoalwastoraisethenutritionvalueofcows'milkbyaddingtwohumangeneswhichdogoodtotheimmunesystemoftheinfants.saidAdrianMuttofromtheNationalUniversityofSanMartinwhichworkedwiththeinstitute. CristinaKirchnerPresidentofArgentinasaidthatthescientificinstitutemakesallArgentinesproud.Shealsorejectedthatshehadrejectedthehonourofhavingthecownamedafterher.TheycametotellmethatthenameisCristinabutwhatwomanwouldliketohaveacownamedafterher?ItappearedtometobemorepropertocallitRosita. 1WhydidthescientistsinArgentinaintroducetwohumangenesintotheclonedcow? A.BecausetheChineseengineersonlyintroducedonegeneintheirresearch. B.BecauseCristinaKirchnerPresidentofArgentinaexpectedthemtoincorporatetwogenes. C.Becausetwohumangenesenabledthecowtoproducemorenutritiousmilkfortheinfants. D.BecauseMuttofromtheNationalUniversityofSanMartinthoughttheycouldbethefirst toincorporatetwogenesinthecow. 2WhatcanbeinferredfromCristinaKirchner'sstatements? A.Shewasquitesatisfiedwiththeresearchdonebytheinstitute. B.Sheconsidereditanhonortonamethespecialcow. C.Shefeltitimpropertobenamedafterthecow. D.Sherefusedtogiveanametothecowoutofself﹣respect. 3WhichofthefollowingcanbestreplacetheunderlinedexpressioninParagraph4? A.havemorevarietiesthan B.bemoresimilarto C.havemorenutritionthan D.bemoredifferentfrom 4What'sthepassagemainlyabout? A.Theimportanceofgeneticengineering. B.Waystoimprovemother'smilk. C.Aclonedcowtoproducehuman﹣likemilk. D.AdvancedagriculturaltechnologyinArgentina.
“水培”是一种新型无土栽培其肥料是植物营养液下列营养液与草木灰草木灰显碱性混合使用后会降低肥效的是
“84”消毒液是生活中常见的物质主要用于杀菌消毒和漂白.如图为某厂家生产的“84”消毒液的商品标签 工业上一般用反应Cl2+2NaOH=NaCl+NaClO+H2O生产NaClO.请回答 1计算该消毒液NaClO中氯元素的质量分数结果保留0.1%. 2生产1吨该消毒液至少需要多少千克烧碱 3某同学将50g含NaClO5%的“84“消毒液稀释至1%需向原溶液中加入多少克水
下列对物质归纳正确的一组是
分类法在学习和生活都具有非常重要的作用下列物质属于氧化物的是
Alexis17satquietlyinthepassengerseatofherdad'scar.Shelethereyeslazilyscanthelandscapeforwildlife.Thenadeercameintoviewabout200yardsinfrontofthem.Dadthere'sadeerthere!Alexissaid.Itwasamaledeerwithsharpantlers角oneachsideofitshead. AsthecarmovedcloserAlexissawthatthedeer'sheadwasbenttowardtheground.Thensheheardascreamandsawanarmflyupnearthedeer'shead.Alexisrealizedthedeerwasattackingawoman.Suea44﹣year﹣oldmotherhadbeenoutforhermorningrun.Thedeerfollowedherandedgedcloser.IknewIwasintroubleSuesays.Shewenttopickupastickforself﹣defenseandthedeercharged.Itliftedherwithitsantlersandthrewherintotheair.Suecouldfeelbloodflewdownherleg.Withinsecondsthedeerhadpushedherofftheroad. WhenAlexisandherfatherpulledupthedeerwasthrowingSuelikeadoll.Alexislookedintothewoman'sterrifiedeyesandbeforeherfatherhadevenstoppedthecartheteenagerjumpedquicklyoutofthecarandrantowardthedeer.Iwaskickingittogetitsattentionshesays.Thenherfatherwhohadfollowedhisdaughterpushedthedeerawayfromthewomen. AlexishelpedSueintothecarandthenappliedapieceofclothtoSue'sinjuredleg.We'regoingtogetyoutoahospitalAlexissaid.Thensheheardherfathershoutloudly.Hehadbeenknockedtotheground.Alexistookholdofahammerfromthecarandrantowhereherfatherlayonhisback.Shebeatthedeer'sheadandneckbuttheblowsdidn'tscareitaway.Iwaslosingfaithshesays.AcouplemorestrikesAlexissaidherfather.Youcandoit.TurningthehammeraroundAlexisclosedhereyesandbeatthedeer'sneckwithallherstrength.Whensheopenedhereyesthedeerwasrunningaway.Alexisgotinthedriver'sseatandspedtowardthenearesthospital. AfterSuewastreatedshetearfullythankedherrescuers.Youexpectateenagegirltogetonthephoneandcallforhelpshesaysnottobeatupadeer. 1WhatwasSuedoingwhenshewasattackedbythedeer? A.Shewasdrivinghome. B.Shewasrestingontheroad. C.Shewastakingexercise. D.Shewasfeedingwildanimals. 2WhatdidAlexisdotosaveSue? A.Shepushedthedeeraway. B.Shehitthedeerwithherfeet C.Shedrovethecartohitthedeer. D.Shebeatthedeerwithahammer. 3WhichofthefollowingwordscanbestdescribeAlexis? A.Strong. B.Cruel. C.Energetic. D.Brave. 4Whatisthebesttitleforthepassage? A.AWomanWasSeriouslyInjured B.ADangerousDeerAttackedaWoman C.AGirlRescuedHerFatherSuccessfully D.ATeenagerSavedOthersfromaDeerAttack
氢气是目前最清洁的燃料请根据氢气制备原理及性质回答下列问题 1对图1装置图仪器名称描述正确的是请填字母序号. A.①为酒精灯B.B为分液漏斗C.C为锥形瓶 2实验室制取并收集氢气所需的仪器是选填以上装置图编号. 3图2是检验氢气的部分装置请问装置G的作用如果气流中存在氢气在装置H中观察到的现象是产生该现象的原因是请用化学方程式解释该反应物中具有还原性的物质是填化学式.
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