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计算下面各题，能简算的要简算． 0.25×+2.5% ×[+（﹣）] ×9.3+9.3×2.25 4.05﹣2.83﹣0.17．
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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.
下列从左到右的变形是因式分解的是A．3-x3+x=9-x² B．y+1y-3=3-yy+1C．4yz-2y²z+z=2y2z-zy+z D．-8x²+8x-2=-22x-1²
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.
若a2+2a=1则a+12=
因式分解4xa-2-2y2-a
因式分解a-ba-4b+10ab
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
因式分解x2+ax+b甲看错了a的值分解的结果是x+6x﹣2乙看错了b的值分解的结果为x﹣8x+4那么x2+ax+b分解因式正确的结果为
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
DearMsCai Thankyouforyourpresentationaboutvirtualreality.WewereamazedbyRealCine'sachievementin36userstoexperiencetheHimalayaswithouteverhavingtogothere.Certainlynooneusingitforfunandgameswillbe37.Howeverinmanywaysvirtualrealityseemsmorelikeatoyratherthanauseful38.Inthiscasewewouldlikeyoutofurther39howwecanusethisinurbanplanning.Wearenotvery40astowhetheranoperatorwillbeabletouseRealCineeasily. Weareconcernedaboutthepriceaswell.Youputforwardtheideathatwewillsave41ifweuseRealCine.Thismaybetrueinthelongterm.42thecostofbuildingaVRstudioisquitehighandthisseemslikeareal43.Pleasesendusmoreinformationonthedailycostsandonhowmuchtimeadesignusually44usingRealCine.Otherwisewecannotgoforward. WhileweareveryinterestedinRealCinewewillneedmuchmoreinformationbeforewecanmakea45. 36.A.forbidding B.allowing C.stopping D.asking 37.A.embarrassed B.excited C.disappointed D.delighted 38.A.technology B.book C.knowledge D.computer 39.A.explain B.guess C.decide D.include 40.A.interested B.worried C.frightened D.confident 41.A.life B.money C.face D.trouble 42.A.So B.Besides C.However D.Also 43.A.disadvantage B.danger C.reason D.chance 44.A.spends B.takes C.pays D.devotes 45.A.mistake B.difference C.decision D.living
下列关于细胞的叙述不能体现“结构与功能相适应”观点的是
Kidsattractedto2017SwedishOutdoorShowasspringstarts STOCKHOLMMarch12Xinhua﹣﹣AlthoughstillcoldintheNordicinearlyspringSwedishkidscouldn'twaittogoforoutdooractivitiesintheearlyspring. OnSaturdayoutdoorclubsandexhibitorsbroughttheirnewproductstotheSwedishOutdoorShow2017inStockholmandencouragedkidstoplayandjointheiractivities. Thisisgoldpanning淘金thatwedointhemiddlepartofSwedenasmalltowncalledKopparberg.ItisaniceactivityforchildrenforadultsjusttobeoutinthenatureandseethelovelynaturethatwehaveinSwedenandmaybefindsomegoldexhibitorUllaKalander﹣KarlssontoldXinhua.TheyhaveseentheprogramontelevisioncalledGoldRushthatcomesfromCanada.Somanypeopleareinterestedingoldpanningtheywanttoberich.Butyoudonotberichyoujustberichofseeingthenaturesheadded. ApartfromtraditionalactivitieslikekayakingandclimbingdivingisanotherfavoriteoutdoorsportsfortheSwedes. Stockholmissurroundedbylakesandeveryoneisreallygoingintolakesanddivingswimmingetc.KidsaretaughttoswimalreadyinschoolsoeverySwedishkidcanswimandgoingfromthereintodivingiseasyofcourseexhibitorAndersHolmbergtoldXinhua. Thethree﹣daySwedishOutdoorShowlastsuntilSundayandisexpectedtobringabout30000activeoutdoorpeoplewithdifferentinterestsandlevelsofexperience. 32.ThemainpurposeofholdingSwedishOutdoorShowisto. A.makesomepeoplebecomerich B.makeaprofitfortheorganization C.getmorepeopletogetclosetonature D.makepeoplemuchstrongerinhealth 33.Theunderlinedpartinthefirstparagraphprobablymeans. A.werenotwillingtogo B.hadastrongdesiretogo C.couldhavenoalternativebuttogo D.couldn'tdecidewhethertogoornot 34.Theauthor'spurposeofwritingthepassageisto. A.informB.entertainC.persuadeD.describe 35.Whichofthefollowingcanbethebesttitleforthepassage? C.ThePastandPresentofSwedishOutdoorShow B.NewProductsAddedto2017SwedishOutdoorShow A.AnOverallIntroductionof2017SwedishOutdoorShow D.KidsAttractedto2017SwedishOutdoorShowasSpringStarts.
下列关于细胞代谢的叙述正确的是
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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