首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
在H、O、C、Na、Cl、Ca六种元素中,选择元素组成物质,用化学式填空: (1)用于金属表面除锈的酸 ; (2)改良酸性土壤的碱 ; (3)作干燥剂的氧化物 ; (4)相...
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
从H.O.C.NaFeCa六种元素中选择适当的元素组成符合下列要求的物质并用化学式填空每空只填一种物
请用C.HONaClCa六种元素中的一种或几种写出符合下列要求的符号①易导电的非金属单质______
从KC.ClHON六种元素中选择适当的元素按要求填空.1五个氮分子2可用于实验室制取氧气的物质是任写
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
在HOC.ClCaNa六种元素中选择适当的元素组成物质写出物质的化学式①可用于人工降雨的氧化物②可用
在hocclnaca六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨的氧化
在HOCClCaNa六种元素中选择适当的元素组成物质并将其化学式填入空格中 可做厨房调味品的盐可
生活中各种物质都是由元素形成的请你用C.H.O.N.ClCa六种元素中的一种或几种组成相应物质按要求
在HOC.ClCaNa六种元素中选择适当的元素组成物质写出物质的化学式①可用于人工降雨的氧化物②可用
在HOC.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中.1人工降雨的
21.3分在H.O.C.ClNaCa六种元素中选择适当的元素组成符合下列要求的物质将其化学式填入空格
请从C.HOClCaNa六种元素中选择恰当的元素组成符合下列要求的物质将其化学式填在空格中1人体胃液
生活中各种物质都是由元素形成的请你用C.H.O.N.ClCa六种元素中的一种或几种组成相应物质按要求
在H.O.C.CaNaCl六种元素中选择适当的元素组成符合下列要求的物质请将其化学式填入空格中1引起
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
选择H.O.C.ClCaNa六种元素中的适当元素组成符合下列要求的物质将其化学式填在空格中1常用来改
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
在H.O.C.ClNaCa六种元素中选择适当元素组成符合下列要求的物质将其化学式填入空格中1人工降雨
热门试题
更多
AbroadsmilespreadJack'sfacewhenheeventuallygainedascholarship. A.across B.through C.at D.in
一种盐水盐与水的比是1150要配制这种盐水755克需盐克需水克.
Thoughatyphoonisonthewaypeoplearestilllookingforwardtheoutdoorconcert. A.tocanceling B.nottocanceling C.nottocancel D.tonotcanceling
Noneoftheunderwaterworkershasbeenharmedbythegreatfish.mostfishweresofriendlythattheyplayedwiththeinstruments. A.Instead B.Eventhough C.However D.Though
xy都是自然数如果+=则x+y=.
长方形的长16厘米宽12厘米它的周长是厘米面积是平方厘米.
长方体长和宽可以相等长宽高也可以相等.判断对错
IfaskedifspaceexplorationshouldcontinuemostAmericanswouldgiveanimmediateresponseeitherinfavorofcontinuingorinfavorofendingspaceexploration.Acommonresponsewouldbethatspaceexplorationisawasteofmoney.AnaverageAmericanuneducatedonthesubjectmightbelievethatthegovernmentiswastingbillionsofdollarsontheresearchthathasnomerit.Someonestrangetothesubjectmightsaythataspaceshuttlegoesuponceinawhileandthatisaboutallthathappens.Researchisongoingandcontinueswhentherearenoshuttlesbeinglaunched.Thisalsocoststhegovernmentmoney.Doestheextremecostofspaceexplorationmakesense? OneargumentisthatthegovernmentiswastingmoneyontheresearchnotbeingusedonEarth.ActuallythemoneygoestoworkersandscientiststhatsupportNationalAeronauticsandSpaceAdministrationNASAmissions任务andgoestomajorcompaniesthatplayimportantrolesinmajorsectorsoftheUSeconomy.BoeingisapartnerofNASAforaircraftthesamecompanythatmakescommercialaircraftfortheairlineindustry. Anotherbenefittocontinuingspaceexplorationisthemanyspinoff衍生的technologiesitprovides.Theartificialheartresultedfromexperimentsonthespaceshuttle.ThehandheldJawsofLifeusedtosavevictimsfromcaraccidentsoriginatedfromthesystemusedtoseparatethespaceshuttlefromitsboosterrockets.Insulationinhomesthatkeepsthemwarmandenergyefficientisbasedonthetechnologyusedtoinsulatethespaceshuttle. TherearedirectbenefitstotheeconomyprovidedbyNASAmissionsaswellasspinofftechnologies.Theseadvancesarefoundinfoodbuildingmaterialsmedicalproceduresandthevehicleswedrive.Whileitcanbeproventhatbillionsofdollarsthatcouldbeusedelsewhereisbeingspentonspaceexplorationthebenefitsitprovidesoutweightheterribleaspects.Asamatteroffactthemoneyspenthelpstoimprovethequalityofourlives. 1HowisParagraph2mainlydeveloped? A.Byofferinganalyses. B.Bymakingcomparisons. C.Bygivingsomeexamples. D.Bypresentingresearchfindings. 2ThefunctionofJawsofLifeisto. A.savepeoplefromtrafficaccidents B.doexperimentsonthespaceshuttle C.keephouseswarmandenergyefficient D.separatethespaceshuttlefromitsboosterrockets 3Intheauthor'sopinionspaceexploration. A.haschangedourlifecompletely B.coststoomuchofourtime C.benefitsusinmanyways D.hasnothingtodowithus 4Whatwouldbethebesttitleforthetext? A.Benefitsofspaceexploration B.Isspaceexplorationworththecost? C.Howtomakespaceexplorationaffordable D.MissionsoftheNASAspaceshuttleprogram
在一条线段上共有9个点则这9个点可以构成38条线段.判断对错
求出下图中的阴影部分的周长和面积. 阴影部分的周长 阴影部分的面积
河道中的水位比正常水位高0.6m记作+0.6m那么比正常水位低0.2m可记作﹣0.2m.判断对错
计算. 1×8× 2++×36 3×+× 487×
某市为迎接全国卫生文明城市评比涌动城市建筑工人日夜奋斗在自己的工作岗位上. 1一条城市道路需要铺上沥青原计划每天铺0.4千米需要15天才能完成实际只用了8天就完成了铺路任务实际每天铺路多少千米 2某工地上要运走一堆约100吨重的建筑垃圾甲乙两车各运了5趟正好把这堆垃圾运完.已知甲车每趟运12.5吨则乙车每趟运多少吨列方程解答
所有的自然数不是质数就是合数..判断对错
质检员共抽查了96件产品不合格产品有4件产品的合格率是
几个完全一样的正方体小木块摆放在桌面上从正面右面上面看都是桌面上至少摆放了个小木块.
如果三角形的面积是24平方厘米则同它等底等高的平行四边形的面积是平方厘米.
假设你是红星中学高二1班的学生李华.下面四幅图描述了上周五你在放学路上撞倒一位骑车老人并实施救助的过程.请根据图片的先后顺序写一篇英文周记. 注意:1.文章的开头已为你写好;2词数不少于60. LastFriday.
Temperaturesquitedramaticallyatnightinmountainssoputonsomewarmclothesbeforegoingout. A.aredropped B.drop C.arebeingdropped D.havedropped
FirstyououghttoknowthatI'monlyfourteen.Mymotherpointsthisoutoften.IcanmakemyowndecisionswhenI'moldenoughtovoteshesays.SecondIshouldtellyouthatshe'sright﹣I'mnotalwaysresponsible.Isometimestaketheprizeforgrade﹣Adork呆子.Takelastweekendforinstance.IwasstayingatDad'sandIdecideditwastimeIlearnedtodrive.ItwasSundaymorning7A.M.andIhadn'tsleptwell.I'dbeenupthinkingaboutanargumentwhichI'lltellyouaboutinaminute.WellnobodywasupyetintheneighborhoodsoIthoughtitcouldn'thurttobackthecaroutofthegarageanddrivearoundtheblock.ButDadhasaclutch离合器car.TheRontheshifthandlewasupontheleftsiderightnexttofirstgear档位.Iguessyoucanguesstherest. Dad'salwaysbeenunderstanding.Hedidn'tsayOkaylittleMissKnow﹣It﹣AllyoucanjustspendtherestoftheyearpayingthisoffwhichiswhatMomwouldhavesaid.InsteadDadworriedaboutwhatmighthavehappenedtome.Andthatmademefeelmoreguiltythananything.Ithinkhe'dbeabetternumber﹣onecaregiverbutIcan'tsaythingslikethattoMom.ToherIhavetosayButMomDad'splaceisclosertoschool.IcouldridemybiketowhichsherepliesAmyLynnyoudon'townabike.Remember?Youleftitintheyardanditwasstolen.Andyouhaven'tgotthepatiencetoearnthemoneytoreplaceit. 1Thewriterfeelsguiltybecauseshe. A.madeherdadworry B.ruinedthecar C.brokethelaw D.didn'ttellhermomaboutthecarincident 2Themainconflictbetweenthewriterandhermotherisaboutwhethershe. A.canmakeherowndecisions B.shouldlivewithhermomorherdad C.shouldbeallowedtodrive D.shouldpayforthingsshelosesorbreaks 3Thewriter'smotherthinksthewriteris. A.tooattachedtoherdad B.tooemotional C.tooshy D.irresponsible 4Inthefirstsentencethewriterusedonlytosuggestthatshe. A.doesn'twanttogrowold B.thinksfourteenisoldenoughforsomethings C.wishesshewereolder D.thinksfourteenisanembarrassingage
Youngpeoplewhohavegotjobsmayrealizeuniversitylessonscan'tbetheonlypreparationforallofthesituationsappearintheworkingworld. A.where B.when C.that D.what
Itisgoodmannerstoeatupisleftinyourplate. A.that B.what C.which D.all
FortherestofMarchadiseasewillsweepacrosstheUS.Itwillkeepkidshomefromschool.1Employeeswillsuddenlylosetheirabilitytoconcentrate. ThediseaseknownasMarchMadnessreferstoyearly65﹣teamUSMen'scollegebaskeballtoumanment锦标赛.2Teamscompeteahainsteachotherinasingle﹣elimination单局淘汰 toumamentthateventuallycrownsanationalchampion. 3Thefuncomespartlyfromguessingthewinnersforeverygame.Friendscompeteagainstfriends.Husbandsagainstwives.Colleaguesagainstbosses. Big﹣nameschoolsareusuallyfavoredtoadvanceintothetournament.Buteachyeartherearedarkhorsesfromlittle﹣knownuniversities.Thisaddstothemadness.Watchingateamfromaschoolwith3000studentsbeatateamfromaschoolwith30000formanyAmericansisanexcitingexperience.Twoyearsagothelittle﹣knownGeorgeMasonUniversitywasoneofthefinalteams4 Collegebasketballplayersarenotpaidsothegameismoreaboutmakinganamefortheiruniversityandthemselves.5About﹩4billionwillbespentgamblingontheevent.AccordingtoMediaLifemagazinetheeventwillbringin﹩500millioninadvertisingincomethisyeartoppingthepost﹣seasonincomeofeveryUSprofessionalleagueincludingthatoftheNBA. A.Nearly20millionAmericanswillfindthemselvesprisonersofbasketballfestivalMadness. B.Theplayerswillgoalloutforthegames. C.Butthatdoesn'tmeanmoneyisn'tinvolved. D.Collegestudentswillignorepilesofhomework. E.Peoplearewillingtospendmoremoneyonwatchingit. F.ItbeginsonMarch15andlaststhroughthebeginningofApril. G.Manypeoplehadneverevenheardoftheuniversitybeforethetournament.
3台同样的织布机4小时共织布840米平均每台织布机每小时织布多少米
一个底面直径和高都是3分米的圆锥它的体积是立方分米一个与它等底等高的圆柱的体积比它大立方分米.
李爷爷家去年共收12000千克玉米今年换了新品种产量增加两成今年一共收千克玉米.
Itoreachthemanagerforthelasttwohoursbutthelineisalwaysbusy. A.tried B.havetried C.hadtried D.havebeentrying
线段AB长3厘米绕着它的端点A旋转180度后这条线段变成了6厘米.判断对错
﹣﹣IhearthattherewasaterriblecrashinthesubwayinShanghaitheotherday. ﹣﹣Yesnewscameasshocktoallofus. A.the;the B.a;/ C.the;a D./;a
三千零六亿五千万写作
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库