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下列物质中，导电性最好的是（ ）
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高三上学期化学《》真题及答案
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下列物质中导电性最差的是
血清
肌肉
神经
脂肪
头发
下列材料中导电性能最好的是__________
电解水制取H2和O2时为了增强溶液的导电性常常要加入一些电解质最好选用下列物质中的
HCl
NaOH
NaCl
CuSO
4
铜的导电性能在金属中是最好的
下列材料中导电性最好的是
铜
铝
钛
下列物质的性质中属于化学性质的是
导电性
可燃性
延展性
挥发性
影响摩擦起电的主要因素有
物质结合的紧密度、分开的速度、材料的导电性、摩擦系数以及位置
分开的速度、材料的导电性
物质结合的紧密度、材料的导电性
分开的速度、摩擦系数以及位置
金属材料都具有导电性其中以导电性能最好
铜
金
银
铁
金属的导电性各不相同通常金的导电性最好
下列导电性最好的是
钢芯铝铰线
铝线
铜线
在电解水制取H2和O2时为了增强水的导电性常常要加入一些电解质最好选用下列物质中的
NaOH
HCl
NaCl
CuSO
4
下列物质中导电性最好的是
熔融的KCl
NaOH固体
蔗糖溶液
普通玻璃
下列关于金属的导电性和电解质的导电性的说法中正确的是
在导电过程中都没有发生化学变化
导电的过程都是带电微粒的定向移动的过程
在导电过程中，都有带负电荷微粒的定向移动
两种物质导电过程中定向移动的粒子是相同的
本身具有导电性或在一定条件下能够呈现导电性的物质称为电解质
下列金属中导电性最好的是
铝
铜
银
电阻的物质其导电性能好不同的物质其导电性能不同的导电性能比铝的导电性能好
金属材料中银的导电性最好铜铝次之
在电解水制取H2和O2时为了增强溶液的导电性常常要加入一些电解质最好选用下列物质中的
HCl
MgSO
4
CuSO
4
NaCl
下列物质的性质中属于化学性质的是
导电性
可燃性
下列选项中具有导电性的物质是
雨水
干燥木材
干燥棉布
陶瓷
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下列说法正确的是
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8分InareasliketheCentralUnitedStatesthatgetlotsoftornadoesthere′sacommonpieceofcelestial天上的fortune﹣tellingthatgreenskiesmeanatornadoisonitsway.Researchhasshownthatitisn′tquiteassimpleasthatbutscientistshavefoundthatifyouseeagreenskyyoushouldprobablygoinside.Asfarasmostscientistscantellthegreenskiesaroundpowerfulthunderstormsareusuallyacombinationofredsunsetsandwaterdroplets.Daytimeskiesarebluebecauseblueshorterwavelengthsofvisiblelighttendtobounceoff反射airmoleculesbetterthanredlongerwavelengthlight.Sothebluelightgetsbouncedallovertheskyandlookslikeit'scomingfromeverywhere.Meanwhilearoundsunsetsunlighttravelsthroughsomuchatmospherethatjustaboutalltheblueisbouncedawayfromthehorizonleavingallthoseredsandorangesbehind.Thesunsetmightlookexclusively独有的redandorangebutthere'sstillsomegreenandevenbluelighthiddenintherejustfarlessthantheothercolors.Butforustonoticetheremaininggreenlightitneedstohitsomethingthatreflectsgreenlightmuchbetterthanred.That'swherewatercomesin.Bigtallthreateningstormcloudsaremadeofwaterdropletsandeventhoughwaterisbestatreflectingbluelightitcanstillreflectgreenprettywellmuchbetterthanredsandorangessounderjusttherightconditionsthewaterinandaroundacloudcanbouncethegreenlighthiddeninthesunsetrightintooureyesmakingtheskylookgreen.Stillnoneoftheconditionsthatcanturnskiesgreenareuniquetothecloudsthatproducetornadoes.Sometimestheyjustleadtolotsofrainandmaybesomehail.Soifyouseehugestormcloudsrollinginandagreentint色调intheskyitdoesn'tnecessarilymeanthere′sabouttobeatornadobutitdoesmeanyoushouldprobablyheadindoors.1.Whatcanbethebesttitleforthetext?A.WhyDotheCentralUnitedStatesGetTornadoesB.DoGreenSkiesMeanaComingTornadoC.ACommonPieceofCelestialFortune﹣tellingD.GreenSkiesAreUniquetoClouds2.Whyaretheskiesblueinthedaytime?A.Becauseonlybluelightcanbebouncedinthedaytime.B.Becausethereismorebluelightthanlightofothercolors.C.Becausebluelightisbouncedalloverthesky.D.Becauseredlightisweakerthanbluelight.3.Whatdoestheunderlinedword'it'inparagraph2referto?A.Thesunset.B.Redlight.C.Bluelight.D.Water.4.Whatcanwelearnaboutfromthetext?A.Stormcloudsaremadeofwaterdropletsandgreenlight.B.Watercanreflectredlightaswellasbluelight.C.Thereareonlyredandorangelightsinthesunsets.D.Ifyouseeagreenskytherewillbeatornado.
同质量的下列气体中所含原子数最少的是
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在元素周期表中金属元素与非金属元素分界线附近能找到
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X﹣的核外电子排布为288则X元素在周期表中的位置是
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陶瓷是火与土的结晶是中华文明的象征之一其形成性质与化学有着密切的关系．下列说法错误的是
下列物质属于碱的是
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NaOH溶液滴定邻苯二甲酸氢钾邻苯二甲酸H2A的Ka1＝1.1×10﹣3Ka2＝3.9×10﹣6溶液混合溶液的相对导电能力变化曲线如图所示其中b点为反应终点．下列叙述错误的是
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某无色透明的溶液中能大量共存的离子组是
科学家合成出了一种新化合物如图所示其中WXYZ为同一短周期元素Z核外最外层电子数是X核外电子数的一半．下列叙述正确的是
8分RichasaKingWilliam1whoconqueredEnglandsome930yearsagohadwealthpowerandanarmy.YetalthoughWilliamwasveryrichbythestandardofhistimehehadnothinglikeaflushtoilet抽水马桶papertowelsorridinglawnmower除草机.Howdidhegetby?Historybooksarefilledwithwealthypeoplewhowerepoorcomparedtome.IhavestormwindowsCroesusdidnot.EntirenationstrembledbeforeAlexandertheGreatbuthecouldn'tbuycatfood.CzarNicholaslackedanelectricsaw.GivenhowmuchbetteroffIamthansomanyfamousdeadpeopleyou'dthinkI'dbecontent.ThetroubleisthatlikemostpeopleIcomparemywealthwiththatoflivingperson:neighborsschoolclassmatesfamousTVpeople.ThegreedIfeeltowardmyfriendHoward'snewkitchenisnotreducedbythefactthatnokingseverhadarefrigeratorwithglassdoorsThereisreallynorisingorfallingstandardofliving.Overthecenturiespeoplesimplyfinddifferentthingstofeelsadabout.You'dthinkthatsimplynothavingdiseasewouldputusinagoodmoodbutnowewantahotbathtoo.Ofcourseonewaytoachievehappinesswouldbetorealizethatevenbytoday'sstandardsthethingsIownareprettynice.MyhouseissmallerthanthehousesofmanyinvestmentbankersbutevensoithasalotmoreroomsthanmywifeandIcankeepclean.Besidestopeoplelookingbackatourerafromacenturyortwointhefuturethesebankers'fancycountertopsandmyawnwornFormicawillseemequallyshabbyIcan'tkeepupwithmyneighborsrightnow.Butjustwait.1.Whatdocstheunderlinedphrase'getby'inthefirstparagraphmean?A.Succeedasaking.B.Dealwithcomplains.C.Getsomeextramoney.D.Liveinasatisfactoryway.2.Howmanyhistoricalfiguresarementionedtocomparelivesinthepastandpresent?A.3.B.4.C.5.D.6.3.Accordingtothepassagetheauthorintendsto.A.tellustobecontentwithlifeB.warnustoliveinasimplewayC.leachustolearnlessonsfromlifeD.encourageuslostruggleforwealth4.What'stheauthor'sattitudetowardslife?A.Doubtful.B.Optimistic.C.Uncaring.D.Cautions.
30分BeingjoblessforthelastthreemonthsIamupsetnowadays.Mysonhaslosthis1fromagoodschoolandhemighthavetogotoalessqualifiedschool.Ihavemovedfromaspacious宽敞的apartmenttoasmalloneinorderto2mylivingexpenses.Mywifehasbuiltextrastress.Ontopofthatmyfatherin﹣law3aweekagowhichhasaddedfueltofire4ourfamilyintoamoreterriblestate.InthesecircumstancesIhavetwomental5:eithertofeelupsetandkeeplosingmypeaceofmindor6mynegativethoughtswithsupermentalpowersaboutself﹣confidenceandconsistencyand7applyingfornewjobswithpositiveattitude.IchoosethesecondoptionbecauseIbelievethatthepainIam8todaywillbuildupmy9.Mystrengthswillthenincreasesmyconfidenceandmakemeagoodtimesmakemea10manoneday.Iunderstandthatgoodandbadstagesarepartof11.Whilegoodtimesmakemehappybadtimes12the‘inner'me.Twomonthslater13Ihavefinallylandedonajobwhichisveryexcitingandoffersanicesalary.Timehashealedmywife'smentalstress14thedeathofherfather.Mysonhasalreadybeenacceptedbyanothergoodschoolbecausetheadmissionsfornewacademicyearwerestill15!AsIambackonthetrackofnormallifeIcan16saythatthemostimportantthingsthathelpedme17thecrisis危机weremyconsistentcharacterofpatienceand18attitudetowardslife.SowhileIwishyouallthebestlifecan19youIwouldhighlyrecommendtakingthesameattitudetowardslife20youaretrappedinanyofsuchsituations.1.A.admission B.benefit C.diploma D.permission2.A.share B.reduce C.break D.raise3.A.showedup B.setoff C.felldown D.passedaway4.A.putting B.finding C.forming D.lifting5.A.problems B.concerns C.choices D.activities6.A.link B.replace C.mix D.exchange7.A.regret B.stop C.keep D.risk8.A.practicing B.suffering C.producing D.relieving9.A.intelligence B.body C.character D.reputation10.A.carful B.hard﹣working C.easy﹣going D.successful11.A.life B.wealth C.time D.health12.A.hide B.destroy C.strengthen D.kill13.A.desperately B.unwillingly C.hopefully D.fortunately14.A.regardlessof B.dueto C.insteadof D.apartfrom15.A.occupied B.empty C.open D.closed16.A.disappointedly B.surprisedly C.deliberately D.confidently17.A.fight B.meet C.change D.delay18.A.general B.positive C.friendly D.honest19.A.offer B.expect C.manage D.send20.A.asif B.inthat C.nowthat D.incase
15分RecentlyanIndianfilm'HindiMedium'hasmade1hit!Ittoldastorythatacouplesparednoeffort2givetheirdaughterthe3goodeducationandfinallyshewasacceptedbytheeliteofDelhi.ActuallythisphenomenoncanalsobeseeninChina.Todaymoreandmoreparentsadopttheideaof''personalqualityeducation'andcommittoencouragingtheirchildrentocultivateavarietyofinterestsoutsidethe4traditionclassroomactivitieslikeplayingtheviolinrobotprogrammingandsoon.Butparticipating5toomanyextracurricularactivitiesdoesdeprivethechildrenoftheirplaytime.It6pointoutthatmoreChineseparentsneedtorealizethatthehand﹣holdingmentalityisoverwhelmingtheirchildren.Theyhavetoloosentheircontrolgivethekidstimeof7theyownandletthemtaketheinitiative.Todayparentsworry8endlessaboutpreparingthekidsfortherealworldabattlefieldwhereeveryonemustarmthemselvesforafight.Butthereisnodenying9thebesttimesinlifearethose10stealmomentswespendwithothers﹣anidleafternoonwithabelovedcompanionacupofteawithanoldfriendorasimplegameoftagwithclassmatesafterschool.
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