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学校组织96位同学去参观游览，给每人发一瓶矿泉水，每瓶矿泉水单价2元，如果整箱买：小箱12瓶可打九折，大箱20瓶可打八折，请你认真开动脑筋，设计只买96瓶矿泉水最省钱的购买方案．
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学校组织96位同学去参观游览给每人发一瓶矿泉水每瓶矿泉水单价2元如果整箱买小箱12瓶可打九折大箱20
两会实名制矿泉水亮相服务员们沏茶倒水的场景不再出现取而代之的是为每名委员提供一瓶矿泉水而且每瓶矿泉水
这种做法是倡导节俭新风
水是人体六大类营养物质之一
矿泉水中的矿物质钙、锌、铁、硒都属于人体需要的微量元素
罐装矿泉水的塑料瓶子由聚乙烯材料制作而成
暑假里三个同学去郊游途中他们喝了9瓶矿泉水每人喝的同样多．买矿泉水时小聪付了5瓶的钱小明付了4瓶的
如果4个矿泉水空瓶可以换一瓶矿泉水现有15个矿泉水空瓶不交钱最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
商店规定用5个空矿泉水瓶可以换一瓶矿泉水现在要让100个人每人喝一瓶矿泉水至少要买矿泉水.
70瓶
75瓶
80瓶
85瓶
已知4个矿泉水空瓶可以换矿泉水一瓶现有16个矿泉水空瓶若不交钱最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
校运会期间某班预计用90元为班级同学统一购买矿泉水生活委员发现学校小卖部有优惠活动购买瓶装矿泉水打
校运会期间某班预计用90元为班级同学统一购买矿泉水生活委员发现学校小卖部有优惠活动购买瓶装矿泉水打9
校运会期间某班预计用90元为班级同学统一购买矿泉水生活委员发现学校小卖部有优惠活动购买瓶装矿泉水打
给全班同学买面包和矿泉水共花了192元每人发2个面包2瓶矿泉水．每个面包2.5元每瓶水1.5元全班
在2014年全国两会召开时实名制矿泉水亮相服务员们沏茶倒水的场景不再出现取而代之的是为每名委员提供一
矿泉水属于溶液
水是人体六大类营养物质之一
矿泉水中的矿物质钙、锌、铁、硒都属于人体需要的微量元素
罐装矿泉水的塑料瓶子可以回收
冰冰凉冷饮店在十一期间开展促销活动凡在本店购买矿泉水喝完后每5个空瓶可换原装矿泉水1瓶壮壮一人买了2
某中学八年级学生李斌在学校附近小卖部购买了一瓶矿泉水他发现矿泉水属三无产品是假冒伪劣产品李斌与同学们
已知4个矿泉水空瓶可以换矿泉水一瓶现有15个矿泉水空瓶若不交钱最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
.一群驴友自助登山登山前组织者给每人都发了矿泉水若每人发2瓶则剩余5瓶若每人发4瓶则其中有一人有矿泉
已知4个矿泉水空瓶可以换矿泉水一瓶现有16个矿泉水空瓶若不交钱最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
如果4个矿泉水空瓶可以换一瓶矿泉水现有15个矿泉水空瓶不交钱最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
已知4个矿泉水空瓶可以换矿泉水一瓶现有16个矿泉水空瓶若不另拿钱购买最多可以喝矿泉水
3瓶
4瓶
5瓶
6瓶
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假如你是学校AdventureClub的秘书Secretary你和社团__President讨论LiuDong的申请讨论完后请你根据对话内容给LiuDong回一封邮件. SecretaryWhatdoyouthinkaboutLiuDong'sapplication? PresidentIthinkhe'sexcellent.Heknowshowtoorganizeadventuresandheknowsalotabouthistoryandnature.HeoncemanagedtoarrangethetriptotheMogaoCavesforhimandhisparents. SecretaryThat'struebutIthinkhe'stooindependent.Weneedclubmemberswhocanworkwellwithothers. PresidentOntheotherhandwealsoneedpeoplewhoknowhowtomakeplansandcarrythemout.IthinkLiuDongcandothat. SecretaryButifheisnotfriendlynoonewillwanttotakepartintheactivitiesheorganizes. PresidentYou'reright.Ihaveasuggestion.Let'sofferhimatrialmembershipforthreemonths.Wecanaskhimtotrytobefriendlierandmoreoutgoing.Attheendofthreemonthshecanbecomeafullmemberifwethinkheisfitforourclub. SecretaryIthinkthat'sagoodidea.Let'ssendhimanemail. 注意1.词数100左右 2.邮件的开头和结尾已给出但不计入总词数. DearLiuDong I'mpleasedtotellyouthattheAdventureClubhasacceptedyouasamember.ThecommitteethinksthatyouwereverybravetoarrangethetriptotheMogaoCavesforyouandyourparents. Sincerelyyours MaLi.
如图是健康小鼠从温度为T的环境中进人温度为T的环境后机体散热量随时间变化的模式图回答下列问题 1当小鼠从温度为T1的环境中进入温度为T2的环境后皮肤温度感受器兴奋经传入神经引起兴奋引起毛细血管收缩和汗腺分泌同时机体分的泌增多引起产热增多以维持体温稳定上述过程的调节方式是 2根据图示分析环境温度T1填“低于”“等于或““高于”T2在T2环境中小鼠机体数热量图增多原因是．
WhenRonaldReaganwhowasPresidentoftheUSAfrom1982to1989diedin2004manypeoplerememberedhisgoodsenseofhumor.Reaganenjoyedagoodjokeandoftenmadefunofhimself.Hewasveryoldalmost70yearsofagewhenhebecamePresidentoftheUSA.Becauseofthispeopleoftenjokedabouthisage.OnceduringameetingPresidentReaganwascomplainingaboutsomereporterswhosaidthathecouldnothearverywell.HewantedtoprovethathewashealthyandcouldhearwellsohetookouthishearingaidandsaidtothepeopleatthemeetingSaysomething.Onemanpretendedtospeak.Hemovedhismouthandmademovementswithhishands.EveryonethoughtReaganwouldbeangrybuthelaughedandlistenedforaverylongtime. PresidentReagannotonlyenjoyedagoodjokewhenhewasrelaxingbuthealsolikedtojokeduringserioussituations.In1981hehadashotaccident.Atthehospitalhejokedtothedoctorsthathehopedtheysupportedhiminthegovernmentandwouldlethimalive.Hewasabletokeephissenseofhumorevenwhenhewashurt. 29.RonaldReaganwasintheyear1985. A.areporterB.anactorC.adoctorD.apresident 30.ThereasonwhypeoplejokedaboutReagan'sagewasthat. A.hebecamePresidentoftheUSAattheageofalmost70 B.hewasnotoldenoughtobePresidentoftheUSA C.hecouldnotliveanormallifeathisage D.helackedasenseofhumorathisage 31.DuringameetingReagantookouthishearingaidtoprove. A.therewassomethingwrongwithhisears B.hewasabletomakeagoodspeech C.hewashealthyenoughtohearwell D.hehadagoodsenseofhumor 32.WhatsentRonaldReagantohospitalin1981? A.Hispoorhearing. B.Hisaccident. C.Hisoverwork. D.Hisillness.
福寿螺进入新的生态环境后种群迅速增长大量取食本土植物给入侵地的湿地生态系统和农业造成严重破坏．请回答下列问题 1调查水田中福寿螺种群密度时取样的过程中与分布密集的季节相比在分布较稀少的季节应当 2福寿螺属于入侵地水田生态系统组成成分中的．若要调查某水域的福寿螺是否为优势种需要在水平上展开研究． 3放养某些禽类和鱼能防治福寿螺繁衍它们的便也能为浮游植物提供营养有利于增加水城生态系统 的生物量．放养食类和鱼增加了水域生态系统中的复杂性同时也增加了生态系统中动物类群的．
因式分解a-ba-4b+10ab
下列关于生物实验的说法正确的是
已知2a=52b=102c=50那abc之间满足的等量关系不成立的是A．c=2b-1 B．c=a+b C．b=a+1 D．c=ab
WhenaskedaboutthepossibilitywhatJustinwastakenbyaliensthepolicemansaidnothing..
若xm=2xn=3则xm+2n的值为
阅读材料若m²-2mn+2n²-8n+16=0求mn的值． 解∵m²-2mn+2n²-8n+16=0∴m²-2mn+n²+n²-8n+16=0∴m-n²+n-4²=0∴m-n²=0n-4²=0∴n=4m=4．根据你的观察探究下面的问题1已知x²+2xy+2y²+2y+1=0求2x+y的值2已知a-b=4ab+c²-6c+13=0求a+b+c的值．
Ittookmemorethantwohourstocleanoutthefridgeandfreezerlastweek.AfterI41everydrawerandthrewaway42leftoversIwenttothegroceryshopforthefirsttimeinmonths. I'drunintotheshopforaloafofbreadmilkoreggs.I43fruitsandvegetablesandcleanedandcutthemintosmallpiecestostoreinmynewlycleanedfridge.I44clothesoutfromunderthegirls'45andwashedthem.Itookthree﹣inchpilesofpapersoutoftheirschoolfoldersandread46fromtheirteachers. Afterafewmonthsofworkinglike47IspentlastweekworkingasMomma.WhenyouareThemommaalotof48youfeellikethereisnoone49behindyoutotakeupthechores杂物.Icannot50imaginehowitmustfeeltobean51parent.ButI'mforfortunatebecauseasI52myselfinworkmyhouseandmychildren's53didn'thavetosuffer. MyhusbandZeb54uptotakecareofmykidandhome.Mymothercametostaywithmeforacoupleofweeks55Zebtravelledforwork.ThentherewasMrs.VelmamyangelIsentstraighthomefromheavenwhodoesasamatteroffactcleanmy56betterthanIevercouldbutwhomore57fillsmyhousewithpositiveenergyandwouldn'tletmeget58. Workingparentsall59tofindthebalancebetweenworkandhomethejobandfamily.Ipersonallydon'tthinkthatbalanceexistswithout60.WhileIwasontheworkendmymomVelmaZebandMadeleinemybabysittergavemehelp. 41.A.searched B.emptied C.watched D.noticed 42.A.broken B.separated C.unrecognizable D.different 43.A.judged B.sent C.bought D.took 44.A.kicked B.put C.picked D.dug 45.A.boxes B.cupboards C.beds D.tables 46.A.notes B.blame C.instructions D.articles 47.A.blind B.crazy C.mindless D.angry 48.A.ways B.aspects C.times D.moments 49.A.hiding B.running C.standing D.calling 50.A.still B.yet C.already D.even 51.A.strict B.loving C.single D.hard﹣working 52.A.stick B.devote C.absorb D.involve 53.A.lives B.study C.homework D.relationship 54.A.woke B.stepped C.put D.got 55.A.before B.since C.while D.if 56.A.bedroom B.yard C.road D.house 57.A.luckily B.gladly C.importantly D.diligently 58.A.angry B.pleased C.relaxed D.discouraged 59.A.deserve B.struggle C.keep D.continue 60.A.effort B.knowledge C.support D.judgment
山楂果含有丰富的果胶黏度大．某科研小组用果胶酶处理山植鲜果浆来制备山楂酒流程如图所示． 请回答下列问题 1与用果胶酶处理鲜果浆相比燕煮处理过的山賛酒口感较差原因可能是 酒精能与产生颜色反应因此可用该试剂来检测酒精的生成情况．果浆发酵山楂酒前期向发酵液通入无菌空气的目的是． 2为了使果胶酶得到充分利用需要控制好酶的用量．在25℃条件下用果胶酶处理山楂鲜果浆5h后 所得结果如图所示 ①提高果胶酶的利用率又方便与产物分离可使用技术 ②增加果胶用量后果酒的透光率上升pH下降的原因分别是从透光率考虑鲜果浆中果胶醇的合适添加量应为mL・L﹣1
ThatholidaymorningIdidn'thavetoattendschool.UsuallyonholidaysMother1metosleepin.AndIwouldcertainlytakefulladvantageofit.Onthisparticularmorning2Ifeltlikegettingupearly. Istoodbymywindowoverlookingthe3havingnothingbettertodo.ButasitturnedoutIwassoontolearnaboutsomething4inlife. AsIwatchedseveralpeoplegobygetintotheircarsanddriveoffI5anoldmanonabicyclewithabucketonits6andabasketofragsandbottlesonitsback﹣carriage.He7fromonecartoanotherwashingandcleaningthem.Fromthewateronthegrounditseemedthathehadalready8washingandcleaningaboutadozenormorecars.Hemusthavebeguntoworkquiteearlyinthemorning. Severalthoughts9mymindasIwatchedhimwork.Hewasn'twell﹣dressed.Hehadonapairofshortsandan10T﹣shirt.Thebicycleherodewasnotbyanymeansthekindmodern11wouldwanttobeseenridingon.Butheseemed12withlife.Therehewasworkinghardathissmallbusiness13atpassers﹣byandstoppingtochatnowandthen14elderlymenandwomenontheirwaytothemarketnearby. Therewasanoticeabletouchof15inthewayheseemedtobedoingthings﹣16thewindscreen挡风玻璃thenstandingbacktoadmireitscrubbing擦净thewheelsand17standingbacktoseewhattheylookedlikeafterthescrub. Itwasa18tolearn.Ifelt.Atnoageneedonehavetobegfora19ifonehasgoodhealthandiswillingtoworkhard.ForawhileIfelt20ofmyself.YoungasIam﹣justsixteenandtherewasthisoldmanwhomusthavebeenusefullyengagedperhapsbeforethesunappearedabovethehorizon. 1A.forces B.allows C.causes D.forbids 2A.otherwise B.therefore C.however D.besides 3A.parkinglot B.busstop C.school D.market 4A.interesting B.surprising C.awful D.useful 5A.noticed B.recognized C.called D.assisted 6A.back B.handle C.wheel D.seat 7A.searched B.left C.moved D.wandered 8A.stopped B.started C.intended D.finished 9A.crossed B.slipped C.disturbed D.inspired 10A.attractive B.shiny C.simple D.expensive 11A.repairmen B.businessmen C.drivers D.cyclists 12A.busy B.content C.careful D.bored 13A.waving B.looking C.laughing D.pointing 14A.about B.for C.with D.like 15A.worry B.respect C.sympathy D.pride 16A.cleaning B.fixing C.replacing D.covering 17A.still B.yet C.again D.soon 18A.lesson B.subject C.skill D.fact 19A.business B.living C.success D.right 20A.tired B.doubtful C.fearful D.ashamed
因式分解a²a-b+4b²b-a
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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∧并在其下面写上该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下面划一横线并在该词下面写上修改后的词. 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. IattendedtoasummerschoolinLondonthissummer.OncewehadadebateonWhichisbetterablogorabook?.Wedividedintotwogroups.Mygroupsupportedblogs.DuringtheheatingdiscussionIpointedoutthatblogswerebetterthanbooksfortheirconvenientandlowprice.ThenotherstudentfromthesamegroupaddedAblogalsobuildconnectionsbetweenthewriterandthereadersandbetweenthereaderswhosefeelingsaresimilarlybycommentsandreplies.Thiscommunicationfurtheraddstoagoodsocialorder. ItsuddenlyoccurstomethatallthereasonsIhadgivenwerejustbasedonthebenefitsofoneside﹣thereaders.Andmyclassmateconsideredtheconnectionbetweenpeopleandsocietyasawholethatimpressedmealot.
EVENTS Bicycletourandrace AbiketourandracewillbeheldonAugust26and27Sat.&Sun..At530a.m.theriderswillleaveTian'anmenSquareandridethefirst35kilometersasatrainingleg.Thenthenext55kilometerslegfromYanjiaotoJixianwillbethefirstcompetitivepartofthetour.TheridersandtheirbikeswillthenbetakenfromJixiantoChangli.ThesecondracinglegofthetourwillbefromChanglitotheseasideofNandaihecoveringadistanceof20kilometers.SaturdaynightincludesthestayatNandaiheandsupper.Sundaymorningisfreeforplayingattheseaside.AtnoonallthepeopleandtheirbikeswillbetakenbacktoBeijing. Cost200yuanTelephone84675027 Rockclimbing TheThirdNationalRockClimbingCompetitionwillbeheldonAugust26﹣27attheHuairouMountainclimbingTrainingBase.Morethan10teamsfromBeijingWuhanDalianJilinandotherplaceswilltakepartinit.AJapaneseteamwillgiveanexhibitionclimbing.Freeforspectators观众. Time/Date9﹣12a.m.August26﹣27 Telephone8714317787144850WangZhenghua 21.Ifyoutakepartinthebiketouryouwillridekilometers. A.35B.55C.75D.110 22.Theunderlinedwordleginthefirstparagraphprobablymeans. A.race B.practice C.partofthetraining D.partofthetour 23.Whatisspecialabouttherockclimbingcompetition? A.Aforeignteamtakespartinit. B.Youcanwatchitwithoutpaying. C.Youdon'thavetobeasportsmantotakepartinit. D.Thebustriptotheplaceofcompetitionisfree. 24.WhichtelephonenumberswillyoucallifyouwanttoknowmoreabouttheThirdNationalRockClimbingCompetition? A.Both84675027and87143177. B.Both87144850and84675027. C.Either87143177or87144850. D.84675027.
Useyourbrainyouwillfindanapproachtosolvingtheproblem..
AmericanswearblackformourningwhileChinesewearwhite.WesternersthinkofdragonsasmonsterswhileChinesehonorthemassymbolsofGod.Chinesecivilizationhasoftenshownsuchpolarities截然对立两极化withtheWestasthougheachstandsatextremeendsofaglobalstring.NowintheUniversityofCaliforniaBerkeleyapsychologisthasdiscovereddeeperpolaritiesbetweenChineseandAmericancultures﹣polaritiesthatgototheheartofhowwereasonanddiscovertruth. HisfindingsgofartowardexplainingwhyAmericanculturesseemtobecontentiousandChineseculturessopassivewhencomparedtoeachother.MoreimportantlytheresearchopensthewayforthepeopleoftheEastandtheWesttolearnfromeachotherinfundamentalway.TheChinesecouldlearnmuchfromWesternmethodsfordeterminingscientifictruthsaidPengKaipingaformerBeijingscholarwhoisnowaUCBerkeleyassistantprofessorofpsychologyandAmericanscouldbenefitgreatlyfromtheChinesetolerance容忍foracceptingcontradictions矛盾insocialandpersonallifehesaid. Americanshaveaterribleneedtofindoutwhoisrightinanargument.saidPengTheproblemisthatattheinterpersonallevelyoureallydon'tneedtofindthetruthormaybethereisn'tany.ChinesepeoplesaidPengarefarmorecontenttothinkthatbothsideshaveadvantagesanddisadvantagesbecausetheyhaveaholistic整体的awarenessthatlifeisfullofcontradictions.TheydofarlessblamingoftheindividualthanAmericansdo.headded. InstudiesofinterpersonalargumentforexamplewhensubjectswereaskedtodealwithcontradictoryinformationstemmingfromconflictsbetweenamotherandadaughterorastudentandaschoolPengfoundthatAmericanswerenon﹣compromisingblamingoneside﹣usuallythemother﹣forthecausesoftheproblemsdemandingchangesfromonesidetogetasolutionandofferingnocompromise和解indealingwiththeconflict冲突.ComparedtothisangrytheChinesewereparagons模范ofcompromisefindingfaultonbothsidesandlookingforsolutionsthatmovedbothsidestothemiddle. 32.InParagraph1theauthorsetsexamplesinorderto. A.showthedifferencesbetweenChineseandAmericans B.showthedifferencesbetweenChinesecultureandAmericanculture C.findthereasonforthedifferences D.generalizethemainideaofthepassage 33.TheunderlinedwordcontentiousinParagraph2probablymeans. A.conservative B.optimistic C.objective D.argumentative 34.ComparedwithAmericansChineseare. A.likelytofindthetruthinlife B.unwillingtoadmittheirownfailure C.unwillingtohaveageneralideaofthings D.likelytoknowadvantagesanddisadvantagesofthings 35.Thestudiesshowthat. A.anAmericantreatshisorhermotherbadly B.ideasoftreatingtheoldaredifferent C.charactersofChineseandAmericansaredifferent D.conflictsofAmericansandChinesearedifferent.
观察x-1x+1=x2-1x-1x2+x+1=x3-1x-1x3+x2+x+1=x4-1据此规律当x-1x5+x4+x3+x2+x+1=0时代数式x2015-1的值为
2017﹣03﹣10chinadaily.com.cn MotherNatureinChinesephotographer'slens Forthosewhohaven'tgotthetimetotravelthisexhibitionfeaturingnumerousphotosofthebeautyofMotherNaturewillbeadelightfortheweekend.Fromthesephotosvisitorscanseethegreatnessandpowerofnatureandthedifferencesbetweenhumansandanimals. Time9am﹣5pmthroughMar19closedonMondays VenueNationalArtMuseumofChina1WusiAvenueDongchengdistrict. TicketFree Contact010﹣64001476 TheBritishMuseumbringsahitshowtoBeijing TheBritishMuseum'shighly﹣acclaimedAHistoryoftheWorldin100Objectshasattractedmorethanonemillionvisitorsduringitsworldtour.ThatnumberisgrowingfastwithitsChinalegprovingasuccesssinceitopenedinBeijinglastweek. TheexhibitiondevelopedfromabroadcastingseriesthattheLondonmuseumstartedinpartnershipwiththeBBCin2010.Each15﹣minuteprogramintroducedoneof100objectsfromthemuseum'scollectionthatrevealed展现thecommunicationmethodsofvarioushumanculturesoverthecourseoftwomillionyears. Time9am﹣5pmthroughMay31closedonMondays VenueNationalMuseumofChina16EastChang'anAvenueDongchengdistrict. Ticket50yuan Contact010﹣65116400 Whenphotographslooklikepaintings Thelinebetweenpaintingandphotographyhasblurred模糊inconceptualartist概念艺术家FuWenjun'sworks.Fornearly30yearshehasdevotedhimselftotheexplorationofproducingphotosthatlooklikeabstractpaintingstoinspirepeopletothinkratherthansimplyappreciatetheaccuracyofimages.Fu'songoingexhibitionaimstoprovidemoreinsightsintohisartworld. Time9am﹣5pmthroughMarch19closedonMondays VenueNationalArtMuseumofChina1WusiStreetDongchengdistrict. TicketFree Contact010﹣64001476 Museumcelebrates80﹣year﹣oldlacquermaster KnownasthefatherofmodernChineselacquerart80﹣year﹣oldQiaoShiguangbreathesnewlifeintothecountry'slong﹣standingtraditionoflacquerpainting漆画. Heapplieseggshellchips蛋壳碎片todemonstratethepeacefulbeautyofSouthernChina.ThelacquerpaintsunderhisbrushespresentsthedepthofEasternaesthetics. Time9am﹣5pmthroughMar19 VenueNationalCenterforthePerformingArts2WestChang'anAvenueXichengdistrict. TicketFree Contact010﹣66550000 25.AccordingtothetextwecanlearnthatFuWenjunisan. A.photographerB.lacquerpainterC.broadcasterD.conceptualartist 26.AssumingyouareinterestedintraditionalChinesepaintingswhencanyougoandenjoyoneaccordingtothetext? A.10amMar31B.3pmMar19C.9pmMay31D.10amMay19 27.Youcanenjoythefollowingartworksfreeofchargeexcept. A.FuWenjun'sworks B.QiaoShiguang'sworks C.photosofthebeautyofMotherNature D.AHistoryoftheWorldin100Objects.
ItisapowerfreefridgewhichwasinventingbyafarmerfromFrance..
Todayrollerskatingiseasyandfun.Butalongtimeagoitwasn'teasyatall.Before1750theideaofskatingdidn'texist.ThatchangedbecauseofamannamedJosephMerlin.Merlin'sworkwasmakingmusicalinstruments.Inhissparetimehelikedtoplaytheviolin.JosephMerlinwasamanofideasanddreams.Peoplecalledhimadreamer. OnedayMerlinreceivedaninvitationtoattendafancydressball.Hewasverypleasedandalittleexcited.AsthedayofthepartycamenearMerlinbegantothinkhowtomakeagrandentranceattheparty.Hehadanidea.Hethoughthewouldgetalotofattentionifhecouldskateintotheroom. Merlintrieddifferentwaystomakehimselfroll.Finallyhedecidedtoputtwowheelsundereachshoe.Thesewerethefirstrollerskates.Merlinwasveryproudofhisinventionanddreamedofarrivingatthepartyonwheelswhileplayingtheviolin. OnthenightofthepartyMerlinrolledintotheroomplayinghisviolin.Everyonewasastonishedtoseehim.Therewasjustoneproblem.Merlinhadnowaytostophisrollerskates.Herolledonandon.Suddenlyheranintoahugemirrorthatwashangingonthewall.Downfellthemirrorbreakingtopieces.NobodyforgotMerlin'sgrandentranceforalongtime! 1Thetextismainlyabout. A.astrangeman B.anunusualparty C.howrollerskatingbegan D.howpeopleenjoyedthemselvesinthe18thcentury 2PeoplethoughtMerlinwasadreamerbecausehe. A.oftengaveotherssurprises B.wasfullofimagination C.inventedtherollerskates D.wasagiftedmusician 3Merlinputwheelsunderhisshoesinorderto. A.impressthepartyguests B.arriveatthepartysooner C.testhisinvention D.showhisskillinwalkingonwheels 4Whatisthemainpointthewriteristryingtomakeinthelastparagraph? A.Rollerskatingwasdangerousandharmful. B.ThepartygueststhoughtMerlinwasafool. C.Merlinsucceededbeyondexpectation. D.Merlingothimselfintotrouble.
顺铂是一种用于治疗肝癌的药物．线粒体内的活性氧ROS聚积后能激活线粒体依赖性的凋亡通路引起细胞凋亡．已知在正常培养条件下的肝癌细胞不发生凋亡下面两幅图表示用不同浓度的顺铂处理肝癌细胞后获得的结果．下列分析错误的是
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处不计分. OurEnglishteacherMs.Joancametoourschoolin1986.ShetaughtEnglishfornearly31yearssofar.Sheworkshardlyandhasbeenamodelteacherforages. Sheiskindtousbutsheisratherstrictwithusaswell.ShealwaysencouragesourselvestospeakandreadmoreEnglish.Sheisgoodatteachingandtriesherbesttomakeeverylessonlivelyandinterested.Sheisnotonlyourteacherandalsoourfriend.Westudentsloveandrespectforher. Tomorrowsheisgoingtoattendaimportantmeetingatwhichshewillbegivenamedalforhisadvanceddeeds.Webothsincerelycongratulateheronachievingsoextraordinaryachievements.
3a+3b+13a+3b-1=899则a+b=
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