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小刚利用如图所示的滑轮组及相关器材进行实验，改变所挂物体重G，在绳自由端施加竖直向上的拉力F，使滑轮组匀速提拉重物升高相同的高度，拉力所做的总功为W，滑轮组的机械效率为η．不计绳重及轮与轴的摩擦，选...
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如图所示在测滑轮组机械效率实验中物体重为5.4N.1实验时要_____向上_______拉动弹簧测力
小刚利用如图所示的滑轮组及相关器材进行实验改变所挂物体重G在绳自由端施加竖直向上的拉力F使滑轮组匀
如图所示在测滑轮组机械效率实验中物体重为5.4N若物体上升高度为10cm此时弹簧测力计的示数如图中所
如图13所示在测滑轮组机械效率实验中物体重为5.4N.1实验时要竖直向上且拉动弹簧测力计若物体上升高
小明用如图所示的滑轮组做测滑轮组机械效率实验时将物重G.为3.6N的物体匀速提起时滑轮组的机械效率为
如图所示在测滑轮组机械效率的实验中若物体重6N.1实验时应沿竖直方向拉动弹簧测力计.若物体上升高度为
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如图所示在测滑轮组机械效率实验中物体重为5.4N若物体上升高度为10cm此时弹簧测力计的示数如图中所
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某兴趣小组利用电解装置探究“铁作阳极”时发生反应的多样性实验过程如下． I．KCl作电解质 1一定电压下按图1装置电解现象如下 石墨电极上迅速产生无色气体铁电极上无气体生成铁逐渐溶解． 5min后U型管下部出现灰绿色固体之后铁电极附近也出现灰绿色固体10min后断开K．按图﹣2进行实验． ①石墨电极上的电极反应式是． ②确认灰绿色固体中含有Fe2+的实验现象是． ③灼烧晶体X透过蓝色钴玻璃观察到火焰呈紫色．结合平衡移动原理解释“试管i中析出白色晶体”的原因是． 2其他条件不变时用图3装置重复实验10min后铁电极附近溶液依然澄清断开K．按图﹣4进行实验 ①盐桥的作用是． ②与实验I中vivii与ii～v中的现象比较可以得出的结论是答两点． II．KOH作电解质 3用图1装置电解浓KOH溶液观察到铁电极上立即有气体生成附近溶液逐渐变为淡紫色FeO42﹣没有沉淀产生． ①铁电极上OH﹣能够放电的原因是． ②阳极生成FeO42﹣的总电极反应式是． ③某同学推测生成FeO42﹣的必要条件是浓碱环境将图5中的实验方案补充完整证实推测成立．
HowtoBecomeCleverer Onceaboycametoaskafishermanhowtobecomeclevererbecausehismotheralwayscalledhimfoolishboy. That'seasyansweredthefisherman.Iknowonewaytomakeyoubecomecleverer. Really? Ofcourse.Itissaidafishheadisgoodforbrain.Ifyoueatoneyou'llbecomeclevererindeed.Payonlythreepoundsforonefishhead.Theboypaidhimthreepoundsandthefishermancutoffafishheadandhandedittohim. Arawfishheadisnotgood﹣notevenforahungryboytoeatbuttheboyateitupintwogulps. Doyoufeelanything?askedthefisherman. Notinmyheadsaidtheboy. Theboylayonthegroundandthought.Onewholefishcostsonlytwopounds.Ihadpaidhimthreepoundsforthefishhead.Whycouldn'tIhavethewholefishforsoupaheadforbrainandonepoundleftover?Hejumpedupandshoutedatthefisherman.Youthief!Youarefoolingme!ThefishermanlaughedsayingThefishheadworksnowyousee. 1Theboyateuptherawfishheadonlyintwogulpsbecausehe. A.enjoyit B.wantedtotasteit C.tookitasagoodmedicine D.wasafoolishboy 2Theboycametothefishermaninorderto. A.buyafishhead B.askthefishermanaquestion C.buyawholefish D.AandC 3Theboypaidthreepounds.Heshouldhavehad. A.awholefish B.afishheadandonepoundback C.awholefishandonepoundback D.awholefishafishheadandonepoundback 4helpedtheboybecomecleverer. A.Agoodmeal B.Therawfishhead C.Nothing D.Whathadhappened
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某同学探究SO2使品红溶液褪色的过程将SO2通入水中得到pH＝2的溶液A后续操作如下下列说法不正确的是
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一定温度下探究铜与稀HNO3反应过程如图下列说法不正确的是
IhaveafriendnamedMontywhoownsahorseranch牧场.Onedayhetoldmeastory. Therewasayoungmanwhowasthesonofahorse1.Hisfatherhadtogofromtheirhousetoranchtraininghorses. Onedaytheboy*steacheraskedthestudentsto2apaperaboutwhattheywantedtobeanddowhentheygrewup.Thatnighttheboyfinishedaseven﹣pagepaper3hisdreamofowningahorseranch.Heevendrewa4ofa4000﹣square﹣foothouse.Buthe5gotaredFonthefirstpage.Theboywiththedreamaskedhisteacher‘WhydidIreceiveanF?'Theteachersaid.Thisisan6dreamforayoungboylikeyou.Owningahorseranchneedsalotof7.There'snowayyoucouldeverdoit.'Thentheteacher8‘IfyourewritethispaperwithamorerealisticdreamIwillgiveyouamorerealistic9.' Theboywenthomeandaskedhisfatherwhatheshoulddo.Hisfathersaid‘Looksonyouhavetomakeyourown10.' Finallytheboy11thesamepapermakingnochangeatall.Hesaid‘You12keeptheFandI'llkeepmydream.' MontythenlookedatmeandsaidItellyouthisstory13youaresittinginray4000﹣square﹣foothouseinthemiddleofmy200﹣acrehorseranch.HecontinuedTwosummersagothe14teacherbrought30kidstocampoutonrayranchforaweek.Whentheteacherwasleavinghesaid‘LookMontyIcantellyouthisnow.WhenIwasyourteacherIwasadream15.DuringthoseyearsIstolealotofkids'dreams.16youhadnotgivenyoursup. Don'tletanyonestealyourdream.17yourheartnomatterwhat.Youcanachieve18youwantinlifeifyouhavethe19todreamittheintelligencetomakearealisticplanandthe20toseethatplanthroughtotheend. 1A.keeper B.farmer C.driver D.trainer 2A.copy B.write C.check D.recite 3A.describing B.spreading C.realizing D.predicting 4A.conclusion B.line C.circle D.picture 5A.also B.just C.really D.still 6A.unrealistic B.strange C.funny D.common 7A.knowledge B.practice C.money D.creation 8A.requested B.warned C.repeated D.added 9A.opinion B.grade C.impression D.suggestion 10A.decision B.promise C.standard D.living 11A.setdown B.gaveout C.handedin D.toreup 12A.must B.can C.should D.dare 13A.when B.although C.until D.because 14A.particular B.devoted C.experienced D.same 15A.stealer B.maker C.holder D.leader 16A.Hopefully B.Fortunately C.Surprisingly D.Sadly 17A.Follow B.Search C.Take D.Feel 18A.nothing B.however C.anything D.wherever 19A.energy B.patience C.wisdom D.courage 20A.lime B.will C.skill D.chance
三效催化剂是最为常见的汽车尾气催化剂其催化剂表面物质转化的关系如图所示下列说法正确的是
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在群体中位于某对同源染色体同一位置上的两个以上决定同一性状的基因称为复等位基因．已知紫色企鹅的常染色体上也有一系列决定羽毛颜色的复等位基因Ggchgbg显性效应为G＞gch＞gb＞g．该基因系列在决定羽毛颜色时表现型与基因型的关系如表 请回答下列问题 1以上复等位基因的出现体现了基因突变的特点企鹅羽毛颜色的基因型共有种． 2基因型Gg的个体是深紫色的研究发现由于臭氧层“空洞”近年来在紫外线的辐射增强的地区某些基因型Gg个体的背部也会长出白色羽毛产生这种变异的原因可能是某些细胞在有丝分裂的间期发生了基因中序列的改变也可能是染色体结构发生的变异． 3现有一只浅紫色雄企鹅和多只其他各色的雌企鹅如何利用杂交方法在一个繁殖季节里检侧出该雄企鹅的基因型写出实验思路和预期实验结果即可．
下列关于NH4Cl的化学用语正确的是
Cl2是一种重要的工业原料液氯储存区贴有的说明卡如下 下列解释事实的方程式不正确的是
假如你是李华请按如下提示给酷爱中国书法的外教Mr.Smith写一封信邀请对方参加你校举办的国庆书法展NationalDaycalligraphyexhibition. 1.展出时间2017年10月1日﹣5日 2.展出地点学生活动中心5楼 3.展出作品300多幅师生作品 注意1.词数100词左右 2.可以适当增加细节以使行文连贯.
Althoughmostparentsdon'tlikedoingitafteralongandexhaustingworkdayreadingbedtimestoriesdoesmakeapositiveinfluenceonyourchild'semotionalandmentalhealth.1 Ithelpstodevelopchildren'simagination. Readingbedtimestoriescandevelopyourchildren'sabilitytoformpicturesorideasintheirmind.Ahealthyimaginationmakestheirmindsworkwellandteachesthemtothinkquicklyyeteffectively.2 Itimproveschildren'slanguage. Readingalsoimprovesyourchildren'slanguage.3They'llmostlikelyusethosewordsinthestoriesyoureadrightaftertheyhearthem.Listeningtomanystorieshelpskidstoexpresstheiropinionsbetter. 4 Readingbooksmakespeoplemorelearned.Whenchildrenhearthestoriesyoutelltheylearngrammarandvocabularyforexample.Ithelpsthembesuccessfulinschoolastheyalreadyknowalotfromyourstories.What'smoreeverystoryhasitsmoralaspectandtellsthemwhat'sgoodandwhat'sbad. Thesereasonsleavenochancesofdoubtingwhethertoreadbedtimestoriestoyourchildrenornot.5TheywillthankyouinfutureIpromise. A.Itfosterschildren'saffectionforreading. B.Itmakeschildrenknowledgeable. C.Takealookatthebestbenefitsofitandyou'llneverbelazytodothat. D.Sohowevertiredyouarefindtimetoreadbedtimestoriestoyourchildren. E.Bedtimestoriescreatejustunforgettablemoments. F.Theyremembermostwordsyousayandenlargetheirvocabulary. G.They'llbesuccessfulinmanyaspectsthankstoawonderfulimagination.
SO2广泛用于医药硫酸工业等领域回收废气中的SO2可用如下方法． 1方法Ⅰ的过程如下． ①制备Al2SO4xOHy 向Al2SO43溶液中加入CaO粉末调pH至3.6．CaO的作用之一是促进水解填离子符号下同二是沉淀一部分． ②吸收Al2SO4xOHy吸收SO2后的产物是写化学式． ③解吸加热②中产物产生SO2Al2SO4xOHy再生． 2方法Ⅱ中在Fe2+催化下SO2O2和H2O生成H2SO4的化学方程式是． 3方法Ⅱ中Fe2+的催化过程可表示如下 ⅰ2Fe2++O2+SO2＝2Fe3++SO42﹣ ⅱ…… ①写出ⅱ的离子方程式． ②下列实验方案可证实上述催化过程．将实验方案补充完整． a．向FeCl2溶液滴入KSCN无变化 b．向FeCl2溶液通入少量SO2滴入KSCN颜色变红． c．取b中溶液． 4方法Ⅱ中催化氧化后采用滴定法测定废气中残留SO2的含量．将VL已换算为标准状况废气中的SO2用1%的H2O2完全吸收吸收液用如图所示装置滴定 共消耗amLcmol/LNaOH标准液． ①H2O2氧化SO2的化学方程式． ②废气中残留SO2的体积分数为．
InModemsocietythereisagreatdealofargumentaboutcompetition.Somevalueithighlybelievingthatitisresponsibleforsocialprogressandprosperityotherssaythatcompetitionisbadthatitsetsonepersonagainstanotherthatitleadstounfriendlyrelationshipbetweenpeople. Ihavetaughtmanychildrenwhoheldthebeliefthattheirself﹣worthreliedonhowwelltheyperformedattennisandotherskills.Forthemplayingwellandwinningareoftenlife﹣and﹣deathaffaire.Intheirsingle﹣mindedpursuit追求ofsuccessthedevelopmentofmanyotherhumanqualitiesissadlyforgotten. Howeverwhilesomeseemtobelostinthedesiretosucceedotherstakeanoppositeattitude.Inaculturewhichvaluesonlythewinnerandpaysnoattentiontotheordinaryplayerstheystronglyblamecompetition.Amongthemostvocalareyoungsterswhohavesufferedundercompetitivepressuresfromtheirparentsorsociety.TeachingtheseyoungpeopleIoftenobserveinthemadesiretofail.Theyseemtoseekfailurebynottryingtowinorachievesuccess.BynottryingtheyalwayshaveanexcuseImayhavelostbutitdoesn'tmatterbecauseIreallydidn'ttry.Whatisnotusuallyadmittedbythemselvesisthebeliefthatiftheyhadreallytriedandlostthatwoundmeanalot.Suchalosswouldbeameasureoftheirworth.Clearlythisbeliefisthesameasthatofthetruecompetitorswhotrytoprovethemselves.Botharebasedonthemistakenbeliefthatone'sself﹣respectreliesonhowwelloneperformsincomparisonwithothers.Botharcafraidofnotbeingvalued.Onlyasthisbasicandoftentroublesomefearbeginstodissolve化解canwediscoveranewmeaningincompetition. 1Whatdoesthispassagemainlytalkabout? A.Competitionhelpstosetupone'sself﹣respect. B.Peopleholddifferentopinionsoncompetition. C.Failuresarenecessaryexperienceincompetition. D.Competitionisharmfultoone'sdevelopment. 2Whydosomepeoplefavorcompetitionaccordingtothepassage? A.Itpushessocietyforward. B.Itbuildsupasenseofduty. C.Itencouragesindividualefforts. D.Itimprovespersonalabilities. 3Whatisthesimilarbeliefofthetruecompetitorsandthosewithadesiretofail? A.One'ssuccessincompetitioncallsforgreatefforts. B.One'sachievementisdeterminedbyhisparticularskills. C.One'ssuccessrelieslargelyonhisfirmbeliefofwinning. D.One'sworthliesinhisperformancecomparedwithothers. 4Whichpointofviewmaytheauthoragreewith? A.Competition﹣damagesfriendshipamongpeople. B.Performanceincompetitiondeterminesone'svalue. C.Fearoffailureshouldberemovedincompetition. D.Winningshouldbeamaileroflifeanddeath.
现代生物工程技术推动了免疫学畜牧业和生态工程的发展回答下列相关问题 1某高校研发的幽门螺杆菌疫苗为基因工程疫苗实验证明一定时间内间隔口服该疫苗3次效果更好其主要原因是体内产生的细胞数量增多该类细胞在病原体再次进入人体后会迅速增殖分化产生更多的浆细胞进而产生更多的导致获得的免疫预防作用更强持续时间更久． 2对大面积烧伤病人利用自身健康皮肤细胞借助技术可获取大量用于移植的皮肤培养细胞时的条件为的环境合适的营养适宜的温度通入含有95%空气和5%CO2混合气体．CO2的作用是． 3用细胞核移植技术繁育良种牛的过程需要进行胚胎移植移植前需要对供体和受体牛进行处理受体对外来胚胎基本不发生为胚胎在受体内的存活提供了可能． 4依据生态工程的原理黄河三角洲自然保护区的建立需考虑提高农民经济收入使保护环境和经济发展相互协调．
Afterayearatsea16﹣year﹣oldLauraDekkercanfinallysayMissionaccomplished!Lastmonthshefinishedadaringtriparoundtheworldaboardher38﹣footboatGuppy.DekkerwhoisfromtheNetherlandstraveledmorethan30000milesallbyherself.Sheistheyoungestpersonevertosailaroundtheglobealone. Dekkerhadwantedtolakeonthischallengewhenshewasevenyounger.Shefirsttriedtosetsailattheageof13butacourtintheNetherlandsstoppedher.Theysaidthatshewastooyoungtomakesuchariskytripbyherself.ButDekkerinsistedshehadthenavigationskillsandpatienceofanadultsailor. ShefinallytookoffonJanuary202011.DuringhertripDekkerbattledlonelinessstormsandworriesaboutpirates.Butshealsogottosurfscubadiveandstartedanewhobbyplayingtheflute.AlthoughDekkerdidn'tspendallofhertimeatsea﹣shestoppedatportsalongtheway﹣shedidspendher16lhbirthdayontheopenocean.Tocelebrateshealedoughnutsforbreakfast. ButDekkerdidn'tsailintotherecordbooks.GuinnessWorldRecordsandtheWorldSailingSpeedRecordCouncilnolongerrecognizerecordsforyoungestsailors.Theydroppedthecategoryin2009todiscouragechildrenfromattemptingsuchdangerousfeats壮举Butthatdidn'tstopDekkerwhowasbornonayachtduringaseven﹣yearworldvoyageundertakenbyherparents. Dekkerdoesn'tmindthatshewon'tholdanofficialrecord.Shesaysitwasapersonalgoalandsheishappysheachievedit. IamnotdisappointedatallthatGuinnessWorldRecordwon'trecognizemyattempt.Dekkerwroteonherwebsite.Ididnotstartonmytriptoachieveanyrecord…Ididitjustformyself. 1Dekkerwasn'tallowedtosailattheageof13because. A.peoplewereconcernedabouthersafety B.shedidn'tlearnanysailingskillswell C.shehadtocontinueherstudyatschool D.shedidn'thaveenoughpatienceforlongtrips 2WhatdoestheunderlinedwordaccomplishedinParagraph1mean? A.Failed. B.Completed. C.Continued. D.Started. 3In2009recordsforyoungestsailorswerecanceledinorderto. A.setahighersailingstandardforteensailors B.stopchildrenenteringGuinnessWorldRecords C.encourageparentstosailwiththeirchildren D.preventchildrenmakingdangerousattempts 4Whatcouldbethebesttitleforthispassage? A.ANewGuinnessWorldRecordinSailing B.ANewSailingStandardforTeenSailors C.ATeenGirlSailingAloneAroundtheWorld D.TheYoungestSailorinGuinnessWorldRecords
Checkoutthesegreatopportunitiesforfamilyfun. Boo﹣CampJack﹣O'﹣LanterLoreandPumpkinCarving～HalfMoonBay JoinusatBob'sPumpkinFarminHalfMoonBaywherestudentsofallageswilllearnaboutthehistoryofjack﹣o'﹣lantersbeforepickingtheirownpumpkinlearningfuncarvingtechniquesandcarvingtheirownjack﹣o'﹣lanternforHalloween. SaturdayNightAstronomyShowsatFujitsuPlanetarium天文馆～Cupertino LearnaboutspaceandscienceonSaturdayeveningsattheFujistuPlanetariumontheDeAnzaCollegecampus.FamilyshowsincludeSecretoftheCardboardRocketTheLittleStarThatCouldMagicTreeHouseSpaceMissionWeAreStarsThisIsOurSky!andExtremePlanets. HolidayBasketballCamp～MountainView LearnvaluableskillsfromMVHSbasketballcoachesinthishalf﹣daycamp.Shootingballhandlinganddefensewillbeamongtheskillscoveredinahigh﹣energyfast﹣pacedenvironment.Thisisagreatopportunitytohavefunstayactiveandworkonyourgame.Opentoboys&girlsingrades3﹣8thecampwilltakeplace9am﹣12intheMountainViewHighSchool. AGoat'sLifeatHarleyFarms～Pescadero JoinHomeroomEducationforadayoffamilyfunatHarleyFarmsinPescadero.Familieswillgetupclosewithdairygoatsinoneofourmostpopularhands﹣onworkshopsforstudentsofallages.PullonyourbootsandheadouttoHarley Farmstomeetthegoatsandlearnallabouttheirbiologyandecology. 1Wherecanyougoifyou'reinterestedinstars? A.HalfMoonBay. B.HarleyFarms. C.ThefuitsuPlaetriunm. D.MountainViewHighSchool. 2WhatdoesHomeroomEducationoffertofamilies? A.Achanceofpersonalparticipation. B.Aglanceatraisingdairygoats. C.Anexperiencewithbasketballstars. D.Funofcarvingtheirownpumpkins. 3Whattypeofwritingisthispassage? A.Anofficialreport. B.Anexhibitionguide. C.Anactivityreview. D.Anactivityintroduction.
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. Haveyoueverhadaheadacheduringatest?Haveyoueverbeentooworriedaboutsomethingthatyouhaveaheadacheorevencan'tsleepatnight?Ifsothenyouknowthatstressis. Notallstressisbadforyou.Somekindsofstresscanhelpyougetthingsdobetterlikewhenyouarerunningtowardsthefinishinglineorwhenyouarebeingaskedtogiveaspeechtoyourclass.Stresssometimescanhelppushyoutomakefullpreparationforatest.Howevertoomuchstresscanresultinangerdepressionandotherrelatedproblemswhichweneedtotakeserious. Therearemanythingsinourlifewhatmightcausestress﹣havingtoomuchhomeworktakingadifficulttestandhavingeconomicproblems. It'simpossibletoliveinalifecompletelyfreeofstresssoyoushouldlearntodealwithstress.Thebestwayreducestressistohaveabalancelife.Ifyougetenoughsleepeatproperlytakemoreexerciseandhaveenoughfantimeyou'llprobablyfeellessstressed.
某学习小组探究铁和硝酸银溶液的反应实验过程如下 1根据上述实验现象甲同学认为有Fe2+生成铁和硝酸银溶液的反应的离子方程式是． 2乙同学认为实验中可能生成Fe3+设计并完成如下实验 查阅资料Ag+与SCN﹣生成白色沉淀AgSCN乙同学判断有Fe3+理由是． 3乙同学继续探究红色褪去的原因设计并完成如下实验 ①实验IV的目的是 ②用平衡移动原理解释实验V中溶液红色褪去的原因． 4丙认为溶液中Fe3+是Fe2+被Ag+氧化所致．按如图连接装置并进行实验一段时间后取出左侧烧杯溶液加入KSCN溶液溶液变红 ①其中X溶液是 ②由实验得出Ag+和Fe2+反应的离子方程式是 ③丙同学的实验设计及结论是否合理请说明理由．
It'sdifficulttothinkofabetter﹣knownworkofartthanLeonardodaVinci'sMonaLisa.Michelangelo'sTheCreationofAdamontheceilingoftheSistineChapelcomesclosebutthat'sadetailofahugeworknotaworkofartonitsown.Imagesbymany20th﹣centuryartistslikeSpain'sPabloPicassoandtheUS'AndyWarholarealsoinstantlyrecognizable.HowevernootherpaintingisnearlyasfamousastheportraitinoilsofafashionableyoungladyofFlorenceItaly. Thispaintingisn'tjustfamousbecausetheimageisnowabletobereproducedoverandoveragain.Itsfamehasatleastsomethingtodowiththefactthatit'safinepieceofwork.DaVinciwasaleaderintherevolutioninpaintingintheRenaissanceperiod.TheRenaissancewasmorecenteredaroundhumansthanperviousEuropeanculturewasandtheMonaLisaisafineexampleofRenaissancehumanism.Theworkisaboutaperson.ThewomandaVinicpainteddoesnotrepresentareligiousideabutisanindividualwhomonefeelsthatonecouldtalktoandnow. Andthequestionofwhothewomanishasalwaysinterestedthepublic.Theearliestanswerfrom＝1517isthatshewasjustacertainFlorentineladybutin1550famoushistorianandpainterGiorgioVasarisaidshewasMonaLisathewifeofsilkmerchantFrancescodelGioeondo.OverthecenturiesanumberofotherwomenhavebeenputforthasthemodelincludingasuggestionthatdaVinciusedhimselflookinginamirroraswellastheideasthatshewaspaintedfromdaVinci'simagination.Theworkinvitestheviewer/readertodiscoverforhimselforherselfperhapsinventwhatitmeans. LeonardokeptithimselfandtookitwithhimtoMilanRomeandFranceanduseditasacallingcardsaidLarryFeinbergfromtheArtInstituteofChicago﹣sortofanadvertisementHeylookwhatIpainted!Icanpaintforyoutoo! 1Whydoestheauthorrefertothreeotherartists? A.ToshowtheMonaLisaisveryfamous. B.TocomparedaVinciwithotherpainter C.Tointroducedifferentgreatpainters. D.ToprovenootherpainterisequaltodaVinci. 2WhatisstressedbymentioningtheRenaisance? A.PaintingskillsoftheMonaLisa. B.DifferentattitudestotheMonaLisa. C.TheeconomicvalueoftheMonaLisa. D.Thetradition﹣breakingideaoftheMonaLisa. 3WhathelpedtheMonaLisa'spopularityaccordingtoParagraph3? A.Itsbeingpaintedfromimagination. B.Itsbeingopentointerpretation. C.DaVinci'susinghimselfasthemodel D.Manywomen'sclaimingtobethemodel. 4WhatdoesFeinbergsayaboutdaVinci? A.Hewaseagertopaintforpeople. B.HefellinlovewiththeMonaLisa. C.HemadeafortunethrouglhtheonaTis. D.HeusedtheMonaLisatoearnareputation.
日前中科院生物化学与细胞生物学陈剑峰研究组最新研究成果对发烧在机体清除病原体感染中的主要作用及其机制做出了全新阐述．研究成果发表在国际免疫学权威期刊免疫上．该发现让人们对发热的作用和退热药的使用有了全新的认识．下列有关说法错误的是
Anumbrellaisafoldingclothcoversupportedbywoodenormetalribs伞骨.Thewordumbrella1typicalreferstoagreatinventionofChinausedfor2protectfromrain. TheChinesecharacterforumbrellaisrelatedtotheshapeofarealone3resemblethemodernumbrellaindesign.Someinvestigatorshavesupposedthatitsinvention4createbytyinglargeleavestobranchy﹣likeribs.Othersadvocatethattheideaprobablycamefromthetent5remainsunchangedinformtothepresentday. 6useoftheumbrellawasoftenlinkedtohigh﹣rankinginancientChina.7atleastoneoccasiontwenty﹣fourumbrellaswerecarriedbeforetheEmperor8hewentouthunting.Theumbrella9serveinthiscaseasadefenseagainstrainratherthansun.TheChinesedesignwaslaterbroughttoJapanviaKoreaandalsointroducedtoPersiaandtheWesternworldviatheSilkRoad.TheChineseandJapanesetraditionalumbrellaoften10useneartemplesremainssimilartotheoriginalancientChinesedesign.
药物Q适用于治疗高血压心绞痛可由有机物P和L制备． 1有机物P的合成路线如下． 已知RR′R″代表烃基或氢 ①A的分子式为C3H8O其所含的官能团是． ②B的核磁共振氢谱只有一个吸收峰其结构简式是． ③由D生成有机物P的反应类型是． 2有机物L的合成路线如下． 已知 ①生成E的化学方程式是． ②与有机物M发生加成反应M的结构简式为． ③F含羧基化合物N是． ④生成有机物L的化学方程式是． 3以为起始原料合成聚合物甲的路线如下 写出聚合物甲的结构简式．
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