首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
下列结构中所含化学成分相同的一组是（ ）
查看本题答案
包含此试题的试卷
高三下学期生物《》真题及答案
点击查看
你可能感兴趣的试题
稻谷籽粒中所含有的化学成分有矿物质和维生素等
细胞化学染色步骤中的固定是
改变细胞内化学成分
保持细胞结构和化学成分
改变细胞内化学结构
保持细胞化学结构和化学成分
保持细胞结构和改变化学成分
压力容器受压元件所用钢材只需材料的力学性能和化学成分相同就可以批准代用
机体内环境的稳态是指
细胞外液的理化性质保持不变
细胞内液的化学成分相对恒定
细胞外液的理化性质相对恒定
细胞外液的化学成分相对恒定
由于同质多象变体的化学成分相同因此其相对密度也应相同
石墨和金刚石的化学成分相同
在一定的温度且化学成分相同的条件下铁液中碳的饱和浓度不定
细胞化学染色步骤中的固定是
改变细胞内化学成分
保持细胞结构和化学成分
改变细胞内化学结构
保持细胞化学结构和化学成分
保持细胞结构和改变化学成分
化学成分相同厚度相同以下哪一类工件对超声波衰减最大
钢板
钢管
锻钢件
铸钢件
与番泻叶所含的化学成分相类同的药材是
黄连
黄柏
大黄
黄芩
胡黄连
光彩夺目的金刚石的化学成分与玻璃的化学成分相同
化学成分不同即为不同矿物种化学成分相同晶体结构不同亦为不同矿物种
中药化学的研究对象是
植物药中的化学成分
中药中含量高的化学成分
中药中某一标志性的成分
中药中具有生物活性或能起防病治病作用的化学成分
中药中所含有的所有化学成分
内环境稳态是指
血液的化学成分和物理特性维持相对稳定
血浆pH值维持相对稳定
血浆的化学成分相对稳定
细胞内液的化学成分和物理特性维持相对稳定
细胞外液的化学成分与物理特性维持相对稳定
细胞中许多具有膜结构的细胞器在化学成分上很相似其中与高尔基体的化学成分相似的细胞器是
线粒体
核糖体
叶绿体
滑面型内质网
金属中具有相同的化学成分相同的结构和相同的物理性能的组织称为
组织
组元
合金
相
脂多糖是________所含有的一种化学成分
灰垢和灰渣的化学成分相同
热门试题
更多
依托孕烯是一种激素类药物结构如图所示．下列有关依托孕烯的说法正确的是
下列离子方程式不正确的是
刘徽是我国魏晋时期卓越的数学家他在九章算术中提出了割圆术利用圆的内接正多边形逐步逼近圆来近似计算圆的面积．如图若用圆的内接正十二边形的面积S1来近似估计⊙O的面积S设⊙O的半径为1则S﹣S1＝π取3.14
计算|﹣1|﹣2sin60°+﹣1+．
下述实验不能达到预期目的是
8分Morestudentsthaneverbeforearetakingagap﹣year间隔年beforegoingtouniversity.Itusedtobecalledtheyearoffbetweenschoolanduniversity.Thegap﹣yearphenomenonoriginated起源withthemonthsleftovertoOxbridgeapplicantsbetweenentranceexamsinNovemberandthestartofthenextacademicyear. Thisyear25310studentswhohaveacceptedplacesinhighereducationinstitutionshaveputofftheirentryuntilnextyearaccordingtostatisticsonuniversityentranceprovidedbyUniversityandCollegeAdmissionsSerbiceUCAS. Thatisarecord14.7%increaseinthenumberofstudentstakingagapyear.TonyHigginsfromUCASsaidthatthestatisticsaregoodnewsforeveryoneinhighereducation.Studentswhotakeawell﹣plannedyearoutaremorelikelytobesatisfiedwithandcompletetheirchosencourse.Studentswhotakeagapyearareoftenmorematureandresponsiblehesaid. Butnoteveryoneishappy.OwainJamesthepresidentoftheNationalUnionofStudentsNUSarguedthattheincreaseisevidenceofstudenthadship﹣youngpeoplearebeingforcedintoearningmoneybeforefinishingtheireducation.Newstudentsarenowawarethattheyarelikelytoleaveuniversityupto￡15000indebt.Itisnotsurprisingthatmoreandmorestudentsaretakingagapyeartoearnmoneytosupporttheirstudyforthedegree.NUSstatisticsshowthatover40%ofstudentsareforcedtoworkduringtermtimeandthefigureincreasesto90%duringvacationperiodshesaid. 29.Whatdowelearnaboutthegapyearfromthetext A.Itisflexibleinlength. B.Itisatimeforrelaxation. C.Itisincreasinglypopular. D.Itisrequiredbyuniversities. 30.AccordingtoTonyHigginsstudentstakingagapyear. A.arcbetterpreparedforcollegestudies B.knowalotmoreabouttheirfuturejobs C.aremorelikelytoleaveuniversityindebt D.haveabetterchancetoentertopuniversities 31.HowdoesOwainJamesfeelaboutthegap﹣yearphenomenon A.He'spuzzled. B.He'sworried. C.He'ssurprised. D.He'sannoyed. 32.WhatwouldmoststudentsdoontheirvacationaccordingtoNUSstatistics A.Attendadditionalcourses. B.Makeplansforthenewterm. C.Earnmoneyfortheireducation. D.Preparefortheirgraduatestudies.
火箭发射常以液态肼N2H4为燃料液态H2O2为助燃．已知 N2H41+O2g＝N2g+2H2Og△H＝﹣534kJ•mol﹣1 H2O21＝H2O1+1/2O2g△H＝﹣98.64kJ•mol﹣1 H2O1＝H2Og△H＝+44kJ•mol﹣l 则反应N2H41+2H2O21＝N2g+4H2Og的△H＝．
已知 现有一种用于治疗高血脂的新药“灭脂灵”是按如下路线合成的． 已知C的分子式为C7H7Cl试回答以下问题 1上述反应①②③④⑤中属于取代反应的是．填序号 2反应⑤的条件可能是． A．NaOH溶液加热B．NaOH醇溶液加热C．稀硫酸加热D．浓硫酸加热 3写出BH的结构简式BH． 4写出I与银氨溶液反应的化学方程式． 5写出含六个甲基且属于酯类的E的3种同分异构体．
15分Theadobedwellings土坯房61buildbythePuebloIndiansoftheAmericanSouthwestareadmiredbyeven62mostmodernofarchitectsandengineers.Inadditiontotheirsimplebeautywhatmakestheadobedwellingsadmirableistheir63abletoairconditionahousewithout64useelectricequipment.Wallsmadeofadobetakeintheheatfromthesunonhotdaysandgiveoutthatheat65slowduringcoolnightsthuswarningthehouse.Whenanewdaybreaksthewallshavegivenuptheirheatandarenowcoldenough66coolthehouseduringthehotday67thesametimetheywarmupagainforthenightThiscycle68godayafterdayThewallswarmupduringthedayandcooloffduringthenightandthusalwaysatimelyoffset抵消fortheoutsidetemperatures.As69naturearchitectsthePuebloIndiansfiguredoutexactly70thicktheadobewallsneededtobetomakethecycleworkonmostdays. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70.
玻璃钢可由酚醛树脂和玻璃纤维制成． 1酚醛树脂有苯酚和甲醛缩聚而成反应有大量热放出为防止温度过高应向已有苯酚的反应釜中加入甲醛且反应釜应装有装置． 2玻璃纤维由玻璃拉丝得到．普通玻璃是由石英砂和石灰石或长石高温熔融而成主要反应的化学方程式为． 3玻璃钢中玻璃纤维的作用是．玻璃钢具有等优异性能写出亮点即可． 4下列处理废旧热固性酚醛塑料的做法合理的是． a．深埋b．粉碎后用作树脂填料 c．用作燃料d．用有机溶剂将其溶解回收树脂．
6分ChooseYourOne﹣DayTours TourA﹣Bath&StonchengeincludingentrancefeestotheancientRomanbathroomsandStonehenge﹣￡until26Marchand￡39thereafter. Visitthecitywithover2000yearsofhistoryandBathAbbeytheRoyalCrescentandtheCostumeMuseum.Stonehengeisoneoftheworld'smostfamousprehistoricmonumentsdatingbackover5000years. TourB﹣Oxford&StratfordincludingentrancefeestotheUniversityStMary'sChurchTowerandAnneHathaway'shouse一32until12Marchand36thereafter. OxfordIncludesaguidedofEngland'soldestuniversitycityandcolleges.Lookoverthecityofdreamingspires尖顶formStMary'sChurchTower.StratfordIncludesaguidedtourexploringmuchoftheShakespearewonder. TourC﹣WindsorCastle&HamptonCourtincludingentrancefeestoHamptonCourtPalace﹣﹣£34untilMarchand£37thereafter. IncludesaguidedtourofWindsorandHamptonCourtHenryMill'sfavouritepalace.FreetimetovisitWindsorCastleentrancefeesnotincluded.With500yearsofhistoryHamptonCourtwasoncethehomeoffourKingsandoneQueen.Nowthisformerroyalpalaceisopentothepublicasamajortouristattraction.Visitthepalaceanditsvarioushistoricgardenswhichincludethefamousmaze迷宫whereitiseasytogetlost! TourD﹣CambridgeincludingentrancefeestotheTowerofSaintMarytheGreat﹣£33.until18Marchand£37thereafter. IncludesaguidedtourofCambridgethefamousuniversitytownandthegardensofthe18thcentury. 33.WhichtourwillyouchooseifyouwanttoseeEngland'soldestuniversitycity A.TourAB.TourBC.TourCD.TourD 34.Whichofthefollowingtourschargesthelowestfeeon17March A.WindsorCastle&HamptonCourt. B.Oxford&Stratford C.Bath&Stonehenge. D.Cambridge. 35.WhyisHamptonCourtamajortouristattraction A.Itusedtobethehomeofroyalfamilies. B.Itusedtobeawell﹣knownmaze C.ItistheoldestpalaceinBritain D.Itisaworld﹣famouscastle.
如图在P处利用测角仪测得某建筑物AB的顶端B点的仰角为60°C点的仰角为45°点P到建筑物的距离PD＝20米则BC＝米．
25分假定你是李华计划和同学去敬老院nursinghome陪老人们过重阳节theDoubleNinthFestival.请给外教露西写封邮件邀她一同前往内容包括 1.出发及返回时间 2.活动包饺子表演节目等. 注意1.词数100词左右 2.可以适当增加细节以使行文连贯 3.结语已为你写好. Lookingforwardtoyourreply. Yours LiHua.
如图点I是△ABC的内心BI的延长线与△ABC的外接圆⊙O交于点D与AC交于点E延长CDBA相交于点F∠ADF的平分线交AF于点G． 1求证DG∥CA 2求证AD＝ID 3若DE＝4BE＝5求BI的长．
某无色溶液中可能含有Mg2+NH4+K+Al3+SO42﹣CO32﹣Cl﹣等离子．现进行如下实验①取10mL该溶液于试管中滴加BaNO32溶液加稀硝酸酸化后过滤得到6.99g白色沉淀②另取10mL该溶液于试管中滴加NaOH溶液产生白色沉淀当沉淀增加到一定量后开始产生气体必要时可加热最后沉淀完全溶解并且随NaOH溶液的加入沉淀和气体物质的量变化如图所示．下列说法不符合事实的是
已知关于x的一元二次方程x2﹣2a﹣1x+a2﹣a﹣2＝0有两个不相等的实数根x1x2． 1若a为正整数求a的值 2若x1x2满足x12+x22﹣x1x2＝16求a的值．
10分Trainingforamarathonrequirescarefulpreparationandsteadygradualincreasesinthelengthoftheruns.36buythebest﹣fittingbest﹣builtrunningshoesyoucanfind.Noonecansaywhichbrandwillworkbestforyouorfeelbestonyourfeetsoyouhavetorelyonyourexperienceandonthefeelofeachpairasyoushop.Whenyouhavefoundshoesthatseemrightwalkinthemforafewdaystodouble﹣checkthefit.37.Asalwaysyoushouldstretch伸展atleasttenminutesbeforeeachruntopreventinjuries. Duringthefirstweekdonotthinkaboutdistancebutrunfiveminuteslongereachday.38itiswisetotakeadayofftorest.Butduringthenextweeksetagoalofatleastamileandahalfperrun.39.Aftertwoweeksstarttimingyourself.40.Dependingonthekindofraceyouplantoenteryoucansetupatimetablefortheremainingweeksbeforetherace. A.Aftersixdays B.Foragoodmarathonrunner C.Beforeyoubeginyourtraining D.Witheachdayincreasethedistancebyahalfmile E.Iftheystillfeelgoodyoucanbeginrunninginthem F.Timespentforpreparationraisesthequalityoftraining G.Nowyouarereadytofigureoutagoalofimprovingdistanceandtime. 36. 37. 38. 39. 40.
草酸H2C2O4是一种有机二元酸具有还原性不稳定性．回答下列问题． 1常温下0.1mol•L﹣1的H2C2O4的溶液的pH约为3写出其电离方程式． 2实验室常通过加热草酸H2C2O4的方法来获取一氧化碳． ①加热草酸分解反应的化学方程式为． ②KHC2O4溶液呈酸性则该溶液中cHC2O4﹣CH2C2O4．填“大于”“等于”或“小于” ③KHC2O4溶液中离子浓度大小顺序． 3实验室常用酸性高锰酸钾标准溶液滴定草酸来测定草酸溶液的浓度判断滴定终点的现象是其反应的离子方程式为． 4草酸钴是制备氧化钴及钴粉的重要原料．在空气中对CoC2O4•2H2O持续加热时的热分解失重数据见下表． CoC2O4•2H2O相对分子质量183固体失重率＝ ①120﹣220℃CoC2O4•2H2O热分解的生成物为． ②300﹣350℃热分解的化学方程式为．
30分WheredoyougowhenyouwanttolearnsomethingAfriendAtutorTheseareall41acesoflearning.Butitmaywellbethatthelearningyoureallywant42somewhereelseinstead.Ihadthe43ofseeingthisfirsthandona44. Mydaughterplaysonarecreationalsoccerteam.Theydidverywellthisseasonandso45atournamentwhichnormallywasonlyformoreskilledclubteams.Thisledtosome46experiencesonSaturdayastheyplayedagainstteams47trained.Throughthefirsttwogamesher48didnotgetonseriousshotongoal.AsapparentI49seeingmydaughterplayingherbest50stilldefeated. ITseemedthatsomethingclickedwiththe51betweenSaturdayandSunday.Whenthey52fortheirSundaygametheywere53different.Theyhadbegunintegrate融合thekindsofplayandteamworktheyhad54thedaybeforeintotheir55.Theyplayedaggressivelyand56scoredagoal. It57methatplayingagainsttheotherteamwasagreat58momentforallthegirlsontheteam.Ithinkitisageneralprinciple.59isthebestteacher.Thelessonstheymaynotbe60whattheywouldhavegotteninschool.Butarecertainlymorepersonalandmeaningfulbecausetheyhadtoworkthemoutontheirown. 41.A.public B.traditional C.official D.special 42.A.passes B.works C.lies D.ends 43.A.dream B.idea C.habit D.chance 44.A.trip B.holiday C.weekend D.square 45.A.won B.entered C.organized D.watched 46.A.painful B.strange C.common D.practical 47.A.less B.poorly C.newly D.better 48.A.fans B.tutors C.class D.team 49.A.imagined B.hated C.avoided D.missed 50.A.if B.or C.but D.as 51.A.girls B.parents C.coaches D.viewers 52.A.dressed B.showedup C.madeup D.planned 53.A.slightly B.hardly C.basically D.completely 54.A.seen B.known C.heard D.read 55.A.styles B.training C.game D.rules 56.A.even B.still C.seldom D.again 57.A.confused B.struck C.reminded D.warned 58.A.touching B.thinking C.encouraging D.learning 59.A.Experience B.Independence C.Curiosity D.Interest 60.A.harmfulto B.mixedwith C.differentfrom D.appliedto.
10分假如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的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错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. OnedaylittleTonywenttoashoppingcenterwithhisparent.Itwasverycrowded.Tonysawatoyonashopwindow.Helikeditsoverymuchthathequicklywalkedintotheshop.Afterlooksatthetoyforsometimeheturnedaroundandfoundwherehisparentsweremissing.Tonywasscaredandbeguntocry.Awomansawhimcryingandtellinghimtowaitoutsideashop.Fiveminuteslater.Tonysawparents.MomsaidHownicetoseeyouagain!DadandIwereterribleworried.Tonypromisedherthatthiswouldneverhappenagain.
8分Yourhousemayhaveaneffectonyourfigure.Expertssaythewayyoudesignyourhomecouldplayaroleinwhetheryoupackonthepoundsorkeepthemoff.Youcanmakeyourenvironmentworkforyouinsteadofagainstyou.Herearesomewaystoturnyourhomeintopartofdietplan. Openthecurtainsandturnupthelights.Darkenvironmentsaremorelikelytoencourageovereatingforpeopleareoftenlessself﹣consciouswhenthey'reinpoorlylitplaces﹣andsomorelikelytoeatlotsoffood.Ifyourhomedoesn'thaveenoughwindowlightgetmorelampsandfloodtheplacewithbrightness. Mindthecolors.Researchsuggestswarmcolorsfuelourappetites胃口.Inonestudypeoplewhoatemealsinablueroomconsumed消耗33percentlessthanthoseinayelloworredroom.Warmcolorslikeyellowmakefoodappearmoreappetizingwhilecoldcolorsmakeusfeellesshungry.Sowhenit'stimetorepaintgoblue. Don'tforgettheclock﹣﹣﹣ortheradio.Peoplewhoeatslowlytendtoconsumeabout70fewercalories卡路里permealthanthosewhorushthroughtheirmeals.Beginkeepingtrackofthetimeandtrytomakedinnerlastatleast30minutes.Andwhileyou'reatitactuallysitdowntoeat.Ifyouneedsomehelpslowingdownturnonrelaxingmusic.Itmakesyoulesslikelytorushthroughameal. Downsizethedishes.Bigservingbowlsandplatescaneasilymakeusfat.Weeatabout22percentmorewhenusinga12﹣inchplateinsteadofa10﹣inchplate.Whenwechoosealargespoonoverasmalleronetotalintake摄入jumpsby14percent.Andwe'llpourabout30percentmoreliquidintoashortwideglassthanatallskinnyglass. 1.Thetextisespeciallyhelpfulforthosewhocareabout. A.theirhomecomforts B.theirbodyshape C.housebuying D.healthydiets 2.Ahomeenvironmentinbluecanhelppeople. A.digestfoodbetter B.regaintheirappetites C.burnmorecalories D.reducefoodintake 3.Whatarepeopleadvisedtodoatmealtimes A.Fatquickly. B.Playfastmusic. C.Usesmallerspoons. D.Turndownthelights. 4.Whatcanbeasuitabletitleforthetest A.IsYourHouseMakingYouFat B.WaysofServingDinner C.EffectsofSelf﹣Consciousness D.IsYourHomeEnvironmentRelaxing
下列离子方程式书写正确的是
8分Mycolortelevisionhasgivenmenothingbutaheadache.IwasabletobuyitalittleoverayearagobecauseIhadmyrelativesgivememoneyformybirthdayinsteadofalotofclothesthatwouldn'tfit.IletasalesclerkfoolmeintobuyingadiscontinuedmodelIrealizedthisadaylatewhenIsawnewspaperadvertisementsforthesetatseventy﹣fivedollarslessthanIhadpaidThesetworkedsobeautifullywhenIfirstgotithomethatIwouldkeepitonuntilstationssignedoffforthenightFortunatelyIdidn'tgotanychannelsshowingall﹣nightmoviesorIwouldneverhavegottentobed. ThenIstarteddevelopingaproblemwiththesetthatinvolvedstatic静电noise.Forsomereasonwhencertainshowsswitchedintoacommercialaloudnoisewouldsoundforafewseconds.GraduallythisnoisebegantoappearduringashowandtogetridofitIhadtochangetoanotherchannelandthenchangeitback.SometimesthistechniquewouldnotworkandIhadtopickupthesetandshakeittoremovethesound.Iactuallybegantobuildupmyarmmuscles肌肉shakingmyset. WhenneitherofthesemethodsremovedthestaticnoiseIwouldsithelplesslyandwaitforthenoisetogoaway.AtlastIendeduphittingthesetwithmyfistanditstoppedworkingaltogether.Mytriptotherepairshopcostme$62andthesetisworkingwellnowbutIkeepexpectingmoretrouble. 21.WhydidtheauthorsayhewasfooledintobuyingtheTVset A.Hegotanoldermodelthanhehadexpected. B.Hecouldn'treturnitwhenitwasbroken. C.Hecouldhaveboughtitatalowerprice. D.Hefailedtofindanymovieshowsonit. 22.WhichofthefollowingcanbestreplacethephrasesignedoffinParagraph1 A.endedalltheirprograms B.providedfewerchannels C.changedtocommercials D.showedall﹣nightmovies 23.HowdidtheauthorfinallygethisTVsetworkingagain A.Byshakingandhittingit. B.Byturningitonandoff. C.Byswitchingchannels. D.Byhavingitrepaired. 24.Howdoestheauthorsoundwhentellingthestory A.Curious B.Anxious C.Cautious D.Humorous.
一个装有进水管和出水管的空容器从某时刻开始4min内只进水不出水容器内存水8L在随后的8min内既进水又出水容器内存水12L接着关闭进水管直到容器内的水放完．若每分钟进水量和出水量是两个常数容器内的水量y单位L与时间x单位min之间的函数关系的图象大致是
一个不透明的袋子中有四个小球上面分别标有数字﹣2﹣101它们除了数字不同外其它完全相同．1随机从袋子中摸出一个小球摸出的球上面标的数字为正数的概率是．2小聪先从袋子中随机摸出一个小球记下数字作为平面直角坐标系内点M的横坐标然后放回搅匀接着小明从袋子中随机摸出一个小球记下数字作为点M的纵坐标．如图已知四边形ABCD的四个顶点的坐标分别为A﹣20B0﹣2C10D01请用画树状图或列表法求点M落在四边形ABCD所围成的部分内含边界的概率．
中国神威•太湖之光计算机最高运行速度为1250000000亿次/秒将数1250000000用科学记数法可表示为
据报道以硼氢化合物NaBH4B元素的化合价为+3价和H2O2作原料的燃料电池负极材料采用Pt/C正极材料采用MnO2可用作空军通信卫星电源其工作原理如图所示．下列说法正确的是
下列计算正确的是
已知二元一次方程组则的值是
下列说法正确的是
热门题库
更多
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
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
国际法
教案备课库
教案备课库
教案备课库
教案备课库
湘公网安备 43130202000226号