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华为Mate20手机搭载了全球首款7纳米制程芯片,7纳米就是0.000000007米.数据0.000000007用科学记数法表示为( )
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全球首款千元4G手机是
中兴ZTE-U9815
酷派-8720L
华为-G716
HTC-T6(Onemax)
2017年10月16日华为Mate系列手机正式发布该手机采用了华为自己研发的麒麟970国产芯片具有初
导体
绝缘体
半导体
超导体
关于AMDE系列APU下列说法正确的是
支持全高清视频、音频
支持3D与高清游戏
采用40纳米制程技术
拥有21.5亿晶体管
全球芯片制造已经进入10纳米到7纳米器件的量产时代.中国自主研发的第一台7纳米刻蚀机是芯片制造和微
0.7×10
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7×10
﹣8
7×10
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﹣10
华为发布了首款5G折叠屏手机其被命名为
MateX
MateS
TateX
MateL
继华为Mate7后华为最新打的年度旗舰华为Mate8已经成为全球抢手的高端智能手机机型它采用了华为最
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②③
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③④
2017年9月华为发布了全球首款人工智能手机芯片麒麟970被称为人工智能芯片近日美国商务部禁止美国企
导体
绝缘体
半导体
超导体
2018年8月31日华为正式发布了全新一代自研手机SoC麒麟980这款号称六项全球第一的芯片随着华为
7×10
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m
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﹣9
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0.7×10
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m
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m
继华为Mate7后华为最新主打的年度旗舰华为Mate8已经成为全球抢手的高端智能手机机型它采用了华为
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国产手机芯片麒麟980是全球首个7纳米制程芯片已知1纳米=0.000000001米将7纳米用科学记
OPPOFind7是全球首款采用SONY第二代堆栈式传感器—IMX214的手机
中国华为麒麟985处理器是采用7纳米制程工艺的手机芯片在指甲盖大小的尺寸上塞进了120亿个晶体管是
1.2×10
9
个
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9
个
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10
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11
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11月26日华为在上海发布了年度旗舰手机MAte8发布会的主题是执念是一种信仰余承东对未来M
te8和P9手机在市场上的表现表示出很高的期待和信心。就像在通讯方面,华为不仅远远超过了国内的竞争对手,还超过了全球的行业领导者。实现这一超越就要 ①认识到整体功能大于部分功能之和 ②坚持一切从实际出发.实事求是 ③根据自身发展需要,建立新的联系 ④发挥意识活动的主动创造性和自觉选择性 A. ①④
②③
①③
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11月26日华为在上海发布了年度旗舰手机Mate8发布会的主题是执念是一种信仰余承东对未来Mate8
①④
②③
①③
②④
华为Mate8手机充满电后电板储存的电能为1.38×10﹣2kW•h相当于J结果精确到0.01华为的
Y480N/Y580N的核心卖点有
2G-GDDR5显存
1TB硬盘(您选择的答案)
28纳米制程高性能显卡
华为Mate20手机搭载了全球首款7纳米制程芯片7纳米就是0.000000007米.数据0.000
7×10
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线宽是集成电路芯片制造中重要的技术指标目前芯片制造的主流技术中线宽为
几个微米
几个纳米
50纳米左右
100纳米左右
华为手机芯片麒麟980采用了纳米的最新工艺
集成电路自1959 年被发明以来其发展的总趋势是在单位面积的芯片上集成的电子元件越来越多 而连接这些
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H2C2O4为二元弱酸.20℃时配制一组cH2C2O4+cHC2O4﹣+cC2O42﹣=0.100mol•L﹣1的H2C2O4和NaOH混合溶液溶液中部分微粒的物质的量浓度随pH的变化曲线如图所示.下列指定溶液中微粒的物质的量浓度关系一定正确的是
材料是人类社会发展的物质基础 港珠澳大桥是世界最长的跨海大桥建造过程中使用了多种新型材料. ①撑起这座海上“钢铁巨龙“的“不锈基座“所用的是双相不锈钢钢筋这是利用了双相不锈钢钢筋的强度高填字母下同的性质. A.导热性B.导电性C.耐腐蚀性 ②建造大桥需用重达6000吨的钢筋混凝土预制件海上吊装钢筋混凝土预制件的吊带是超高分子量聚乙烯纤维组成.这种超高分子量聚乙烯纤维属于. A.金属材料B.无机非金属材料C.复合材料 ③建造大桥的过程中还使用了大量的钢结构这些钢结构露置在潮湿的环境中易发生电化学腐蚀写出发生电化学腐蚀时负极的电极反应式.
关于离子化合物NH5H有正价和负价下列说法正确的是
Itisoftendifficultforfarmerstoidentifydiseasesquicklyenoughtoprotecttheircropsandthoseonneighboringfarms.Nowsomefarmersareusingasimpledevicedirectlyinthefieldtofindvirusesbeforetheyspread.InTanzaniaseveralvirusesareathreattocassavacrops.Farmersstruggletoidentifythediseasesinanurgentefforttoavoidseverecropdamage.Thediseaseidentificationprocessisoftendifficultwhenfarmersareactingontheirown.Iftheydonotknowwhatisattackingtheircropstheycannotdecidethebestwaytofightthedisease.AdevicefromBritishtechnologycompanyOxfordNanoporeischangingthat.ThedeviceextractsdeoxyribonucleicacidbetterknownasDNAfromplants.DNAisthecarrierofgeneticinformationinnearlyalllivingthings.Thedevicehelpsfarmersidentifywhatisharmingtheircropssotheycanchangetomoreresistantcrops.LauraBoykiniswiththeUniversityofWesternAustraliaandalsoworkswiththeCassavaVirusActionProject.ShebroughtthedevicetoaTanzanianfarmownedbyAshaMohamed.Shesaid'WeareherecollectingleafpunchesfrominfectedmaterialtotesttodoaDNAextractionandthenstartsequencing排序inthefield.'ThetestingidentifiedanumberofvirusesinthecassavafieldsnearMohamed'sfarm.Theprocessalsodiscoveredthatplantsconsideredresistanttodiseasehadaverylowvirallevel.OncetheviruseswereidentifiedAshaMohamedwasgiventwokindsofseedsthatareresistanttothediseases.InanothercaseDNAwascollectedfromapawpawtreefarminKenya.WiththattestthetechnologywasabletoidentifydiseasesaffectingNaomiMumo'scrops.NaomiMumosaid'AllmypawpawwereaffectedbyadiseaseandIdidn'tknowwhatkindofdiseaseitwas.ButnowIhavepeoplewhohaveidentifiedthediseaseusingnewtechnologyandwithinaveryshorttime.SoI'mveryhappy.'Thespeedatwhichfarmersidentifydiseasescanmeanthedifferencebetweenthesuccessorfailureonlargeareasofcropland.NowtheuseofsuchsimpleandeasilytransportableDNAsequencingdevicesismakingthatpossible.1What'sthemainideaofthewholepassage?A.FarmersInTanzaniastruggletoidentifythediseasesintheircropsB.HowLauraBoykinhelpedAshaMohamedtoidentifytheviruses.C.DNAsequencingdevicehelpsfarmerstofindvirusesandidentifythediseasesintheircropsquickly.D.ADNAsequencingdevicehelpsfarmerstoidentifythediseasesandkeephealthy.2Whichofthefollowingbestexplains'extracts'underlinedinparagraph2?A.producesB.createsC.refusesD.gets3WecaninferfromthepassagethatNaomiMumoiswiththeDNAsequencingdevice.A.relaxedB.satisfiedC.disappointedD.annoyed4Whichofthefollowingisnottrueaccordingtothepassage?A.Farmersoftenhavedifficultyinidentifyingdiseasesintheircropsquicklybythemselves.B.DNAcarriesgeneticinformationinnearlyalllivingthings.C.BothAshaMohamedandNaomiMumoarefarmersinTanzania.D.Iffarmerscanidentifydiseasesintheircropsquicklytheycanprotecttheircropsandsucceedonlargeareasofcropland.
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. Itwasraininghardlyoutsidewhichmadeitdifficultformetogohomeforlunch.JustasIwaswonderingwhatIshouldeatatnoonIsawafamiliarfigurepassedbyourclassroom.Irushedoutanditwasmymotheralreadyinfiftieswhichbroughtmelunchinspiteoftheheavyrain.InChinamanyparentsmakegreatsacrificesforourchildren.Butwhathadthechildrendoneinreturn?Alltoooftenmostchildrenjusttakeitforgrantedthattheirparentshouldserveforthemunconditionally.Mydearmumordadthankyouverymuchforbringingmeup.HowshallIdoforyou?
DevonGallagheracollegegraduatefromPhiladelphiawantstheworldtoknowexactlywhereshe'sbeenduringherworldwidevacationinaspecialway.Thetravelerwhowasbornwithabonediseasehadherrightlegamputated截肢attheageoffour.AlthoughtheamputationcausedsetbacksforGallagherearlyonshenowseesitasnothingshortofinspirationforlivingherbestlife.Tospreadthatmessage.Gallagherhastakentosocialmediawhereshesharesphotosofhertravelsacrosstheglobebutinsteadofsimplyusingageo﹣tagshewritesherlocationacrossherartificiallegbeforetakingapicture.NowshehasbeentakingpicturesacrosstheContinentwhichshowhercyclingoverthecanalinAmsterdamrelaxingonawalloverlookingthecityofBarcelonaposingwithawaffleinBrusselstakinginthespectacularParthenontempleinAthensandenjoyingarivercruiseinBudapestallwiththewell﹣knownlocationswrittenonherartificialleg.'IgetanewlegeverytwoyearsandIcanchoosethedesignonit.OnedayIhadasuddenthoughttogetachalk﹣board'Gallaghersaid.'Mymumandgrand﹣motherweren'ttookeenontheideabutmyfriendsthoughtitwasgreatandtoldmetogoforitsoIdid.'Gallaghersaidpeopleoftenstarewhenshe'swritingonherlegbutonceshesharesthephotosshereceivesonlypositivefeedback'Myleghasn'tstoppedmefromdoinganythingI'vewantedtodo'shesaid.'Idon'tknowifit'smydeterminationtoprovetomyselfthatIcandoitbutregardlessI'vebeenabletokeepupwithmypeersandleadaprettygreatlife.'Gallaghershowsusthatyoushouldneverletanythingstandinthewayofyourdreams.Andiflifegivesyouanartificiallegmakeart.1WhatmessagedidGallapherwanttospreadinherspecialway?A.Sheenjoyshertravellingacrosstheglobe.B.Shesufferslittlefromherlegsamputation.C.shelooksonhermisfortuneasanotherformofblessing.D.Shehasexactlyfalleninlovewithpostingphotosonline.2Whatdoestheword'which'underlinedinparagraph4referto?A.thecontinentB.thepicturesC.thelegD.thelocation3Gallaphercanbestbedescribedas.A.helpfulandambitiousB.friendlyandgenerousC.determinedandcreativeD.independentandsensible4Whichofthefollowingmightbethebesttitleforthetext?A.NeverTooLatetoshareB.ASpecialArtificialLegC.AnOutstandingPhotographerD.Gallagher'sSummerHolidays
下列反应只需破坏共价键的是
下列实验方法能达到实验目的是
Nowlet'sdiscusssomethingaboutpeople'shabits.1Someofthemaregoodonesbutsomeofthemmaybebadones.Canyourememberanyofthebadhabitsyouusedtohavewhenyouwereveryyoung?2Ofcourseyoudonotdothatanymorebutyoucansurelyrememberyourmotherseffortstotrainyou.Thegoodhabitsyounowhaveinsuchmattersaspersonalcleanlinesswerepartofthisearlytraining.Wemaynotsuckourthumbsanymorebutaswegetolderwegetotherbadhabits.3Anyonewhohastriedtogiveupsmokingknowsthisverywell!4Inbabyhoodit'sthumbsuckingInchildhoodit'snail﹣biting.Inourteensit'ssmoking5Andifanyonetellsyouthathehasnobadhabitsyoucanbesurethathemusthavetheworsthabitofall.Isn'tthattrue?A.Wecan'tgivethemupeasilyeither.B.Eachperiodbringsitsownproblems.C.Generallyspeakingaboylikesbitingnails.D.Everyonehashisorherownhabits.E.Webenefitfromourfriendskindhelp.F.Inmiddle﹣ageit'sover﹣eatingandsoon.G.Perhapsasababyyouusedtosuckyourthumb拇指.
已知有一种烃的结构类似自行车简称“自行车烃”如下图所示下列关于它的叙述正确的是
下列说法错误的是
假设你校英语学习报在组织一个关于城市生活问题的讨论.你也想在报上谈谈你的看法.你谈的主要内容如下 1.城市中有许多高楼大厦繁忙的街道舒适的生活环境但也有许多的污染如噪音和烟尘等 2.乡村生活平静安宁但也有如城市中的问题 3.你的看法. 注意1.词数100个左右 2.可适当增加细节以使行文连贯.
25℃时0.005mol/LBaOH2中H+浓度是
下列物质的制备能够成功的是
化学与生活社会发展息息相关下列说法不正确的是
有机物X是合成青蒿素原料之一. ①X分子中官能团的名称为醛基和. ②X分子中一定在同一平面上的碳原子有个. ③1molX最多能与molH2发生反应.
有关物质的转化关系如图所示部分物质和条件已略去.X是最常见的无色液体B是红色粉末状的物质CD的组成元素相同且D常用于编织物的漂白. 请回答下列问题 1X的电子式为. 2E的化学式为. 3写出反应①的化学方程式. 4写出反应②的离子方程式.
“绿水青山就是金山银山”良好的生态环境是实现美丽中国的基础 ①下列做法与上述观点符合的是填字母. A.作物秸秆露天焚烧 B.废干电池就地填埋 C.植树造林 D.废旧塑料随意丢放 ②生活垃圾的无害化处理包含堆肥法封闭焚烧和. ③居室装修应使用合格板材以防止挥发的甲醛超标.写出甲醛的结构简式.
用标准盐酸溶液滴定未知浓度的氢氧化钠溶液用甲基橙作指示剂下列说法正确的是
Theworldistoobigtotakeinallatonce.Tomakesenseandbeautyofityouhavetolookatasmallpartatatime.Inusingacamerayouchooseasmallpartthroughheviewfinder.Youmovethecamera'framing'picturesuntilyouseeonethatpleasesyou.Then﹣click!Ifyoumakeagoodchoiceyourpicturewillpleaseothersaswellasyourself.'Whereveryouare'saysphotographerErnstHaas'youaresurroundedbypictures.Thetrickistorecognizethem.'Hisphotographofatwistofbarbedwireshowswhathemeans.Mr.Haastellsusofwaystopracticeseeing.Makeasimpleframeofblackcardboard.Takeitoutofthedoorsandlookthroughitateverydaythingslargeorsmallfarawayornear.Atfirstyoumayseenothingtointerestyou.Butsoonpicturesseemtoleap跳atyouthroughtheframe.Oilfloatingonwatermakesapictureinrainbowcolors.Threepeopleonthestepsofanoldhouseformapicturethatseemstotellsastory.Didyounoticesuchthingsbeforeyouusedtheframe?Perhapsnot.Butwithpracticeyousoondonotneeditshelp.Youseethingsasartistsdo.Everywhereshapesandcolorscatchyoureye.Yourmindtakes'snapshots快照'oftheirpatterns.Thenifyouwishyoucansharewhatyouseebytakingaphotographorbymakingadrawingorapainting.Sometimesit'sfunto'seesmall'.Didyouevernoticethedesignoftheseedsinslicedbananas?Haveyoulookeddeepinsidealily?Orseenthestarburstinthecenterofaweticecube?Doyouseecolorsastheyreallyare?Whenyoupainttreetrunksyouwouldmakethembrownorblack.Buttreetrunksarereallygraypurpleyellow﹣green﹣almostanycolorexceptbrownorblack!Doyounoticedetail?Doingsocanbeinmanyways.Rememberingwhatyouseeisoftenusefultoo.Practicecanhelpyou.Atrickforhelpingyoutorememberdetailisthedoubletake.Look﹣don'tlook﹣thenlookagain.1Whatdoestheunderlinedword'trick'inParagraph3probablymean?A.jokeB.magicC.habitD.skill2Whatdoestheauthorwanttotellus?A.Thebetteryoulearntoseethemorealiveyouare.B.Walkinginthecountryyoushouldlookcloselyatthetrunks.C.Abranchwithafewleavesfillstheframewithabeautifuldesign.D.Closeyoureyesandtrytorememberhowitlooks.3Whichofthefallowingistrueaccordingtothetext?A.Whenyoupainttreesyouwouldmakethemgray.B.Glanceatabillandyourememberhowitlooked.C.Seeingisonewayofliving.D.Giveasecondlookandyourememberallthedetail.4Whatisthemainideaofthetext?A.Theworldistoobigtotravelaround.B.Lookaround﹣andsee!C.Whereveryouareacameraisimportant.D.Agoodwaytoseeistocarryacamera
短周期元素mnpq在元素周期表中的排序如图所示其中m的气态氢化物与其最高价氧化物对应的水化物能反应.下列说法正确的是
汽车尾气中排放的NOx和CO污染环境在汽车尾气系统中装置催化转化器可有效降低NOx和CO的排放. 已知①2COg+O2g⇌2CO2g△H=﹣566.0KJ•mol﹣1 ②N2g+O2g⇌2NOg△H=+180.5KJ•mol﹣1 ③2NOg+O2g⇌2NO2g△H=﹣116.5KJ•mol﹣1 回答下列问题 1CO的燃烧热为.若1molN2g1molO2g分子中化学键断裂时分别需要吸收946kJ498kJ的能量则1molNOg分子中化学键断裂时需吸收的能量为KJ. 2CO将NO2还原为单质的热化学方程式为. 3为了模拟反应2NOg+2COg⇌N2g+2CO2g在催化转化器内的工作情况控制一定条件让反应在恒容密闭容器中进行用传感器测得不同时间NO和CO的浓度如表 ①前2s内的平均反应速率vN2=此温度下该反应的平衡常数K=. ②能说明上述反应达到平衡状态的是. A.2nCO2=nN2B.混合气体的平均相对分子质量不变 C.气体密度不变D.容器内气体压强不变 ③当NO与CO浓度相等时体系中NO的平衡转化率与温度压强的关系如图所示则NO的平衡转化率随温度升高而减小的原因是图中压强p1p2p3的大小顺序为.
短周期主族元素RXYZ的原子序数依次增大R的最简单气态氢化物分子的空间结构为正四面体X的+1价阳离子的电子层结构与氖原子相同.元素X和Z形成化合物GG中X和Z元素的质量之比为2316.有两种含Y元素的可溶性化合物E和F在10mL1.0mol•L﹣1E溶液中滴加1.0mol•L﹣1F溶液产生沉淀的物质的量n与F溶液体积V的关系如图所示.下列说法一定正确的是
Itwasmyfirstnightinmycollegedormroom.AcoupleofmonthsagoIwaspreparedforfinals1andthedayIwouldkeepmypromise﹣2outassoonasIhadthechance.I3usedthreatwhenIwasangryorcouldn'tgetmyway.4myparentsjustgrinned.NowI5watchingTVprogramswithmyparents.Imissedthetimemyparentsspentwithme.ImissedthehomevideosI6withmybrotherandsister.Nowthosemomentsareonlymemories.SittingatmydeskwithmylaptopopenI7ane﹣mailtoaradiostationmymomlistenstoeverymorningbeforework.I8aspecialsongcalledDon'tForgettoRemember.Thenextmorningmymomgotoutofbedand9theradioasusual.Shewasamazedbythespeakers'10'Youknowhow11IwasweeksagobecauseIsentmylittlegirltoschoolforthefirsttime?Acollegestudent12usandsaidthatshemissesherparentsand13theyhavedoneforher.Shealsochoseaspecialsongin14ofthem.SowewanttothankCindyforthate﹣mail15itreallyeasedmyworryaboutmylittlegirlgrowingupand16aboutthingsparentsdoforthem'.Thesongbegantoplaywhilemymomranovertomydadand17himup.'Honey!Didyouhearthat?WasthatourCindy?Ourdaughterwhocouldn'twaitto18home?'Mydadjustbarelyopeninghiseyesrepliedwith'Ifitisthatisvery19ofher.'Igotacallfrommymomthatnight.IwassoexcitedtotellherthatI20myfirstdayofcollegeandwetalkedforaboutanhour.JustwhenwewereabouttosayourgoodbyesIaddedonelastplea'Momdon'tforgettorememberme.'1A.revision B.decision C.vacation D.graduation2A.work B.make C.move D.burst3A.even B.yet C.ever D.still4A.And B.So C.But D.Or5A.tried B.missed C.avoided D.imagine6A.sold B.found C.saved D.made7A.downloaded B.addressed C.deleted D.received8A.requested B.sang C.wrote D.produced9A.turnedup B.turnedon C.turneddown D.turnedoff10A.notice B.announcement C.conversation D.argument11A.upset B.excited C.annoy D.cold12A.telephoned B.e﹣mailed C.messaged D.informed13A.something B.anything C.everything D.nothing14A.favor B.defence C.celebration D.honor15A.though B.because C.unless D.until16A.quarreling B.complaining C.bothering D.forgetting17A.woke B.lifted C.raised D.picked18A.return B.get C.leave D.arrive19A.selfless B.honest C.patient D.sweet20A.survived B.hated C.wasted D.expected
Intoday'sworldmanypeopleseemtobe1hungerformoney.Moneydoeshaveitsmostusefuleffectsonthepoor.2evenifapersonhasalreadygotplentyofmoney3happycan'tbeboughtbymoney.Ifmoneywerebeginningallmillionaires4havereallovetruefriendshipgoodhealthandalonglife.Howeverthisisnotalwayscorrect.Since5beginningoftimenothreewordshaveeverinvitedmore6pleasedthan'Iloveyou'.Butcanlovebebought?I'mafraidnotLove7meantogivenottotake.Toeverypersonhealthandalonglifeareboughtwithmoney?Theansweris'No'.Ofallthelongest8lifepeopleintheworldfewofthemaremillionaires.Truefriendshipcan'tbeboughteitherinaworldwheremoneyis9dreamtoomuchitcancausebrotherstoquarrelmarriagetoendloverstohateand10strangetofight.Nomatterhowmuchmoneyyouhaveitisstillnotenoughtomakeahappypersonifyouhavenoonetolaughwithnoonetocryfor.
BritainandFrancearetwoimportantcountriesinEurope.Theyareneighborsseparatedonlybythe20﹣mileseawayoftheEnglishChannel.AndformostofthetimethatthetwocountrieshaveexistedtheFrenchandtheBritishhavebeenrivalsorevenenemies.Oneconflictbetweenthetwocountrieslastedover100yearsandtheBritishandFrenchwereatwarthroughthe18thcentury.Thereisnofightingnowofcourse.Butthereisstillastrongsenseofrivalry敌对betweenthetwonations.That'swhyarecentsurveyintheUKcausedamajorshock.Itrevealed揭露thatonethirdoftheBritishpeoplewouldliketoliveinFrance.Italsoshowedthattwenty﹣onepercentofBritishpeoplewouldactuallyprefertohavebeenborninFrance.Manyreasonsweregiven.FrancehasabetterclimateandamorerelaxedlifestylewithsomeofthelongestholidaysinEurope.Itisthoughttohavebetterpublicservicesineveryareafromhealthtotransport.PeopleinFranceworkshorterhoursandenjoylongervacations.Andthinkofthefoodandwine!Estimates估计ofthenumbersofBritonslivinginFrancerangefrom100000tohalfamillion.Butitisnotone﹣waytraffic.Around15000FrenchpeopleperyearcometoliveinBritainmainlysettlinginLondon.TheyareattractedbyhigherpayinBritainlowertaxesamoredynamiclifestyle.Nowitseemsthatpeoplecangototheplacethatsuitsthembest.1WhydosomeBritishpeopleliketoliveinFrance?A.Theypreferthelongerholidaysthere.B.EnglandhastheworstfoodinEurope.C.FranceisnotfarawayfromEngland.D.Thetwocountrieshavealwaysbeenfriends.2SomeFrenchpeoplemainlysetinLondonbecause.A.theylikebetterthemoredynamiclifestyleB.theythinktherearebetterpublicservicesinitC.theyliveinFranceforalongtimeD.theycanworkshorterhoursthere3Whichwouldbethemostidealwaytoliveforpeopleinbothcountries?A.WorkandliveinFrance.B.WorkandliveinLondon.C.WorkinLondonandliveinFrance.D.WorkinFranceandliveinLondon.4Whatasuggestiondoesthetextgive?A.Bothofthepeopleliketomovebetweentwocountries.B.BothofthepeoplearebecomingmoreEuropean.C.TheFrencharebecomingmoreBritish.D.TheBritisharebecomingmoreFrench.
下列说法正确的是
短周期主族元素XYZW的原子序数依次增大X是原子半径最小的原子Y原子最外层电子数是其内层电子总数的3倍W原子的核电荷数等于XZ原子核电荷数之和X和Z同主族.下列说法正确的是
元素Og中文名为气奥是一种人工合成的稀有气体元素下列正确的是
祖母绿的主要成分为Be3Al2Si6O18含有OSiAlBe等元素. 请回答下列问题 1基态Al原子中电子占据的最高能级的符号是该能级具有的原子轨道数为轨道形状为. 2在500﹣6000C气相中氯化铍以二聚体Be2Cl4的形式存在如图在10000C时氯化铍则以BeCl2形式存在.BeCl2分子中Be的杂化方式为二聚体Be2Cl4中Be的杂化方式为1molBe2Cl4中含有mol配位键. 3氢化铝锂LiAlH是有机合成中一种重要的还原剂可以将羧基还原为羟基如可将乙酸还原为乙醇乙酸和乙醇的熔沸点数据如表 乙酸分子中σ键与π键个数之比为乙酸熔点较高标准状况下乙酸是固体乙酸与乙醇熔点相差很大原因是. 4用氧化物的形式表示出祖母绿的组成.如图是Be与O形成的氧化物的立方晶胞结构已知氧化铍的密度为pg•cm﹣3则晶胞边长为cm.设NA为阿伏加德罗常数的值用含pNA的代数式表示
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