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因式分解：8a3﹣2ab2＝ ．
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因式分解a3-ab2=.
因式分解ab2﹣2ab+a
将a3－ab2因式分解的结果是
.因式分解a3﹣ab2=.
因式分解3a3b﹣12ab2
给出三个整式a2b2和2ab.1当a=3b=4时求a2+b2+2ab的值2在上面的三个整式中任意选择
因式分解a3﹣ab2=
因式分解ab2－4ab＋4a＝________.
因式分解8a3﹣2ab2=.
对代数式a2-2ab+b2进行因式分解属于的问题.
因式分解a3﹣ab2=______.
因式分解:3a2b-4ab=.
因式分解a3－ab2=.
因式分解ab2﹣a=______.
因式分解:3a2-12ab+12b2=.
因式分解a3﹣4ab2
因式分解a3－3a2b－4ab2＝
因式分解a3﹣2a2b+ab2=
因式分解3a2﹣6ab+3b2﹣12c2.
因式分解a3-ab2=.
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BANG!thedoorcausedareverberation回声.ItwasjuststandingtherewithfatherstandingononesideandIontheotherside. Wewerebothingreatanger.Neversetfootinthishouseagain!stormedfather.WithtearswellingupinmyeyesIrushedoutoftheflatandranalongthestreet. Thestreetlightswereshiningcausingrathersad﹣feeling.Iwanderedaimlessly. Ayoungfatherwhoheldachildinhisarmswalkedpastme.IfeltasifIsawmychildhoodfromanotherspacehappyandcarefree. Butnow…Idon'tknowwhetheritisbecauseIhavegrownuporbecausedadisgettingold.Wedifferinourwaysofthinking.Healwaysputhisopinionsandcodesofbehavioronme.WheneverIdosomethingwrongheneveradmitsit.Wearejustliketwopeoplecomingfromtwodifferentworlds.Itfeelslikethereisanirondoorbetweenusthatcanneverbeopened. Iwanderedthestreetswithoutadestinationinmind.Myheartwasfrozenonthishotsummernight.AsIwalkedontherewerefewerandfewerpeopleonthestreetsuntilIhadonlythestreetlightstokeepmecompany.WhenIfinallyreachedthehigh﹣riseapartmentblockinwhichIlivedIsawthatthelightwasstillon. IthoughttomyselfIsfatherwaitingformeorishestillangrywithme? Infactitwasnothing.Perhapsdadwasthrowingawaysomeofhisoldstamps.Perhapshethoughttheywereuseless.IneverhadthecouragetotellhimthatIlikedcollectingstamps.Ican'tstandhisoutrageous蛮横的wordsIcan'tthrowyouawayletalonetheseoldpapers? Allthelightswereoffexceptfather's. Dadwasalwayslikethis.Maybehedidn'tknowhowtoexpresshimself.Aftershoutingatmehenevershowedanymercyoranymomentsofregret.Afteranargumenthehasthehabitofcreeping蹑手蹑脚upinmysleepandthentucking掖盖meunderneaththecovers. Thiswashowhealwayswas.Hehasbeenaleaderforsolongthattellingeveryoneelsewhattodohasbecomehissecondnature. Thelightwasstillon.AmIwrong?Iwhisperedmaybe…WiththekeyinhandIwasasnervousasIhadeverbeen.AtlastIdecidedtoopenthedoor.AssoonasIopenedthedoortearsrandownmycheeks.IsuddenlyrealizedthattheirondoorthatIhadimaginedbetweenusdidnotexistatall.Love﹣itsecondtonone. 1Decidewhichisthebestorderofthefollowingaccordingtowhathappenedinthepassage. a.Iopenedthedoorandenteredthehouse. b.SadlyIranoutintothestreet. c.IreachedtheplacewhereIlivedandsawmyhousestillbrightlylit. d.Ithoughtofmyfather'skindnesstowardsme. e.Iwalkedaboutinthestreetwithoutanyaim. A.bedca B.beacd C.becad D.becda 2Whydoyouthinkthefatheroftenshoutsathisson? A.perhapsthefatherisgettingolderandolder. B.perhapsthesonhasalreadygrownup. C.perhapstheyneveragreewitheachother. D.perhapsthefatherhasgotusedtodoingthat. 3Whatconclusioncanyoucometoafterreadingthepassage? A.Thefathertreatshissoninanunfairway. B.Thefatherisactuallykindtohisson. C.Thefatherisneitherkindnorcrueltohisson. D.Thefatherisalwaysfindingfaultwithhisson.
下列有关生物学实验的叙述正确的是
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
NoticeforTouriststoBeijingExpo2019 The2019BeijingHorticulturalExpo园博会fromApril29toOctober7isanopportunityforinternationaldiscoverywhereculturalelementsofdifferentplacesinChinaareondisplayaswellasgardensandbuildingsabouteachcountry'swonderfulcultureandhistory.Hereisanoticeforwhoeverplanstocome. QuickEntrybyShowingIDCards TomakesureyourquickandorderlyentryintotheExpoSite.pleasewaitinlinesandgetyourIDcardreadyforpre﹣checkticketcheckandsecurityinspectionbeforeentering.Duringtheticketcheckthosewhoholddiscountedticketsmustprovidethematerialsaboutdiscount. SafeTourtotheExpo Consideringyourpersonalsafetypleasedon'ttakeanythingthatmaydisturbothervisitorsortheorderoftheExpoSitesuchaspetskitesandspeakers.Exceptforwheelchairsfortheelderlyandthedisabledandstrollers婴儿推车forchildrennovehicles机动车辆areallowedtoentertheExpoSite TakingActiontoProtecttheEnvironment Tocreateagreenbeautifulenvironmentforyourselfandotherspleasefollowthetravelrules.protectpublicbuildingskeepenvironmentcleanandcareplantsgrowingintheExpoSite.Behaviorssuchasclimbingordestroyingstructuresandexhibitsarenotpermitted. OrderlyTravelbyLimitingtheNumber ForthesafetyofvisitorssometimesstaffmembersmaylimitthenumberoftouristsintosomegardensandbuildingsintheeventofovercrowdingThankyouforyourunderstanding. EnjoyingServiceandHavingFun TouristservicecentersintheExpoSiteprovideservicesincludinginformationinquiry查询storageofpersonalbelongingswheelchairandstrollerrentinglostfoundserviceandsearchformissingpersons.WehopeyouhaveagoodtimeattheExpo. Youcancalltheservicehotlineat86﹣10﹣86484017forinquirysuggestionorcomplaint.Thanksforyourattention. 1WhichofthefollowingisallowedtoentertheExpoSite? A.Wheelchairs. B.Dogs. C.Trucks. D.Cars. 2WhichserviceisNOTprovidedbythetouristservicecentersintheExpoSite? A.Strollerrenting. B.Informationinquiry. C.Sellingthesouvenirs. D.Lostfoundservice. 3Whatcanwelearnfromthepassage? A.Visitorscanbuyticketsonline. B.Thenumberofthetouristsisnotlimited C.Whoeverclimbsthestructurewillgetfined. D.VisitorsshouldshowIDcardbeforeentering
草原是绿色生态环境的重要组成部分．图1所示曲线表示某草原生态系统中三个不同种群的生长和繁衍情况已知种C为自养生物．图2表示该生态系统中光合作用积累的有机物被植食性动物利用的过程图中的字母表示所含的能量．下列说法不正确的是
Tobeagoodteacheryouneedsomeofthegiftsofagoodactoryoumustbeableto1theattentionandinterestofyourstudentsyoumustbea2speakerwithagoodstrongpleasingvoicewhichisfullyunderyourcontrolandyoumustbeableto3whatyouareteachinginordertomakeitsmeaningclear. Watchagoodteacherandyouwillseethathedoesnotsitstill4hisclasshestandsthewholetimeheisteachinghewalksaboutusinghis5handsandfingerstohelphiminhisexplanationandhisfacetoexpressfeelings.Listentohimandyouwill6theloudnessthequalityandthemusicalnoteofhisvoicealways7accordingtowhatheis8about.Thefactthatagoodteacherhassomeofthegiftsofagoodactordoesn't9thathewillindeedbeabletoact10onthestageforthereareveryimportant11betweentheteacher'sworkandtheactor's.The12hastospeakwordswhichhehaslearntbyhearthehastorepeatexactlythe13wordseachtimeheplaysacertainpart14hismovementsandthewaysinwhichheuseshisvoiceareusually15beforehand.事先预先Whathehastodoistomakeallthesecarefullylearntwordsandactionsseemnaturalonthestage. Agoodteacher16inquiteadifferentway.Hisstudentstakeanactivepartinhis17theyaskandanswerquestionstheyobeyordersandiftheydon't18somethingtheysaysorry.Theteacherthereforehastosuithisacttotheneedsofhisstudentswhichisinhisclass.Hecan'tlearnhispartbyheartbutmust19itashegoesalong. Ihaveknownmanyteacherswhowerefine20inclassbutunabletotakepartinastage﹣playbecausetheirbrainswouldn'tkeepdisciplinetheycouldnotkeepstrictlytowhatanotherhadwritten. 1A.play B.hold C.give D.know 2A.clear B.slow C.quick D.loud 3A.act B.talk C.say D.report 4A.for B.before C.behind D.arms 5A.tongues B.word C.legs D.arms 6A.hear B.see C.think D.guess 7A.making B.changing C.expressing D.giving 8A.talking B.thinking C.hearing D.saying 9A.tell B.express C.show D.mean 10A.carefully B.badly C.well D.actively 11A.things B.differences C.points D.similarities 12A.actor B.teacher C.audience D.student 13A.different B.same C.above D.following 14A.just B.never C.ever D.even 15A.read B.known C.fixed D.written 16A.talks B.works C.teaches D.thinks 17A.groups B.party C.play D.class 18A.give B.place C.obey D.hear 19A.create B.discover C.teach D.continue 20A.speakers B.watchers C.actors D.listeners
为了防止干旱阻碍小麦的生长可采用不同给水措施以调整小麦的光合效率．确保产量．各组实验处理及结果如图所示请回答下列问题 1据图分析可知在对小麦的各种处理中处理不会导致植株出现“午休”现象其原因可能是． 2施用磷肥可以提高小麦产量是因为确可以参与光合作用过程中物质的构成列出两种物质． 3调查研究发现同一小麦植株的底部叶片呼吸作用强度比顶部叶片弱其内部原因最可能是． 4在小麦苗期至穗期经常发生蚜虫危害．调查蚜虫密度常用法．为防止蚜虫病害可引入蚜虫的选填“捕食者”“竞争者”“寄生者”．
Everyfestivalhasitsownmeaning.LaborDay.forexamplecelebratesthevalueofhardwork.Thanksgivingisaboutshowingthankstopeoplearoundyou.AndValentines'DayisatimewhenyouexpresslovetoyourlovedonesButsomehowitnowseemsthatallfestivalswejustaboutonething﹣shopping.Andthatcanbeabigproblem. Inawayover﹣consumption过度消费isthemotherofallourenvironmentalproblems.KalleLasnoncetoldCNN.LasnistheorganizerofBuyNothingDayadaysetupinCanadain1992tofightagainstunhealthyspendinghabitsandhasnowbecomeaninternationalevent.It'shelonthedaywhichisknownasBlackFridny﹣afamousshoppingdayintheUSandCanada. Youcanseetheirony讽刺here. EventhoughtheideaofBuyNothingDaywasbroughtup26yearsagoweseemtoneeditnowmorethaneverIt'sjustasLasnsaidallthedifferentkindsofpollutioninourlivestodaybadairqualitythereductionofforestareaendangeredanimalspeciesandplasticbagsfoundintheocean﹣seemtobethesamecauseover﹣consumption. ThelatestexampleistheSingles'DayshoppingcrazeofNov1l.whichsawanewsalesrecordButasNieLiacampaigneratGreenpeacetoldReuters.Record﹣settingover﹣consumptionmeansrecord﹣settingwaste.AnditwasreportedthatlastyeartheSingles'Daypackagesleftmorethan160000tonsofwasteincludingplasticandcardboard.TheCollinsdictionaryhasalsojustnamedsingle﹣useitsWordoftheYearpointingouttheproblemthatthere'retoomanythingswetowoutafteronlyusingthemonce. SoBuyNothingDaymightonlybehereforonedayayearbutit'snotjusttoremindustotheabreakfromshoppingonthatdaybuttochangeourlifestylecompletelyfocusingonfunwithpeoplewecareaboutratherthanwastingmoneyonuselessthings. 1What'stheauthorspurposeofwritingthefirstparagraph? A.Toexpressthepeople'sloveforallfestivals. B.Totalkaboutthemeaningofthefestivals. C.Toappreciatethevalueofthefestivals. D.Tobringoutthetopicofthepassage. 2WhydidKalleLasnorganizeBuyNothingDay? A.Tohelppeoplesavemoney. B.Tocutthecostfordailylife. C.Topreventover﹣consumption. D.Tosetupanewsalesrecord. 3What'sNieLi'sattitudetowardstheshoppingcraze? A.Opposed反对的. B.Supportive. C.Unknown. D.Neutral中立的. 4Whatcanbeasuitabletitleforthepassage? A.CreatingaNewLifestyle. B.BuyNothingDay. C.FestivalsAroundtheWorld. D.AChangeinPeople'sLife.
此题要求改正所给短文中的错误.如有错误则按下列情况改正 删除此行多一个词把多余的词用斜线\划掉 增加此行缺一个词在缺词处加一个漏字符号Λ 修改此行错一个词在错的词下划一横线并在该行下边写出改正后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多改者从11处起不计分 MyinteresthadbeeninbooksinsteadofinfoodsinceIwenttohighschool.InthepastIwasrealinterestedinallkindsoffood.InsummerIlikedtobuyicecreamandcolddrinksandinwinterIliketobuysweetsandsomeanotherfood.WheneverIwentforawalkwithmyparentIwouldaskthembuymesomething.HoweverafterIwenttohighschoolIfoundIwasputtingonmyweight.SoIgaveupthehabitofeatingandbeginningtospendmoneyinallkindsofbooksandmyparentsarealwayscomplainingthatIamamoneyspender!
Goodtimemanagementallowsyoutocompletemoreinashorterperiodoftimelowerstheamountofpressure压力andleadstocareersuccess.Hereissomeadviceforyou. Makeaplan Listallthetasksthatareimportant1Nexthighlightthetasksonyourlisttoshowtheirurgency紧急.Thenfocusonlyononeitematatimeandenjoythepleasureofcrossingoffthecompleteditems. Stayawayfromdistractions分散注意力的事 Thoughthee﹣mailandsocialmediaareimportanttoyoureverydaycommunicationtheyrequiremuchofyourattention.2 Learntosayno 3.Althoughsayingnotosomeoneolderthanyouismuchmoredifficultit'simportanttobehonestandtolookafteryourhealth.Sharingyourlistwithhim/herwillhelptorefusetheadditionalwork. Giveyourselfabreak Don'tbehardonyourself.Youwillactuallyperformbetterifyoutakebreak4.Theworldwillnotfalldownifyouputoffopeningsomee﹣mails. Improveyourplan 5Remakeyourplanandtakeoffthedistractingtaskstofocusonasolution.Dealingwithproblemsinthefaceoftimepressurewillbeoneofyourmostvaluableexperiencesinyourfutureemployment. A.Trynottodomoreworkifpossible B.Takingbreaksisgoodforyourbrains C.Behonestwithyourselfaswellasothers D.Avoidlookingatyourworke﹣mailswhennotworking E.Writethemdownanddon'tjustrelyonyourmemory F.Reviewyourworkplanregularlywhenthingsarenotgoingwell G.Shutthemoffasyouworkonataskrequiringyourfullattention
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
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．
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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.
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Whatwillhappentoyouifyoudon'teata平衡的diet?
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.
他们中许多人都有骑野马的天赋. Manyofthemhavearidingwildhorses.
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.
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
Thatjournalist谈到tohisexperienceinBritainduringWorldWarII.
Anumbrellaisafoldingclothcoversupportedbywoodenormetalribs伞骨.Thewordumbrella1typicalreferstoagreatinventionofChinausedfor2protectfromrain. TheChinesecharacterforumbrellaisrelatedtotheshapeofarealone3resemblethemodernumbrellaindesign.Someinvestigatorshavesupposedthatitsinvention4createbytyinglargeleavestobranchy﹣likeribs.Othersadvocatethattheideaprobablycamefromthetent5remainsunchangedinformtothepresentday. 6useoftheumbrellawasoftenlinkedtohigh﹣rankinginancientChina.7atleastoneoccasiontwenty﹣fourumbrellaswerecarriedbeforetheEmperor8hewentouthunting.Theumbrella9serveinthiscaseasadefenseagainstrainratherthansun.TheChinesedesignwaslaterbroughttoJapanviaKoreaandalsointroducedtoPersiaandtheWesternworldviatheSilkRoad.TheChineseandJapanesetraditionalumbrellaoften10useneartemplesremainssimilartotheoriginalancientChinesedesign.
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