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阅读短文，并回答问题． 中国高寒动车组 动车组在40℃的风雪环境下高速行驶，若不采取措施，车厢底部会被“卷入”大量的积雪，中国高寒动车组利用空气动力学原理，解决了这一难题． 此外，在极寒的天气...
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动车组发生故障后采用机车或动车组进行救援救援机车采用自动空气制 动机和中国标准15号自动车钩对故障动
CR400AF型动车组车端跨接电连接器安装于中国标准动车组车厢之间用于 动车组之间的电气连接
动车组按牵引动力方式可分为内燃动车组和电力动车组按动力配置方式可分为动力集中式动车组和动力动车组
铁路技术管理规程对动车组按牵引方式分为动车组和动车组按动力配置方式分为动力动车组和动力动车组
CR400AF型动车组时速350公里中国标准动车具备互联互通要求即不同厂 家生产的相同速度等级动车组
CR400AF型动车组动车组运行速度达到5km/h时警惕装置正常启用30 秒时动车组同时触发音频信号
修理费用超过该型动车组新车现价70％的符合条件
动车组报废
动车组大破
动车组中破
动车组小破
中国标准动车组CR400AF救援无火回送时牵引变流器可以给动车组发电
动车组运用所是动车组运用检修的主体不承担工作
动车组一级检修
动车组二级检修
专项检修
动车组三级检修
动车组重联时被控动车组应退出占用主控动车组使用调车模式与被控动 车组连接
动车组有3种车钩用于动车组头车重联动车组内部靠连挂用于机车与动车组连挂
动车组运用质量鉴定办法考核评定动车组等级评定实际得分900～999 分为A级动车组800～899分为
通过建设动车组管理信息网络提供动车组配属运用维修______等信息 服务
动车组修程编制
动车组检修计划
动车组履历管理
文献管理
中国复兴号动车组CEMU指形成________体系的动车组
世界标准
亚洲标准
欧洲标准
中国标准
动车组解编时被控动车组应退出占用主控动车组使用隔离模式与被控动 车组连接
动车组按牵引动力方式可分为
内燃动车组和电力动车组
动力集中式动车组和动力分散式动车组
内燃动车组和动力分散式动车组
电力动车组和动力集中式动车组
维修费用超过该型动车组新车现价70％的符合条件
动车组报废
动车组大破
动车组中破
动车组小破
动车组重联操作是指2列动车组编组运行其驾驶方式与单列动车组相同 所有的系统彼此之间相互通信从一个激活
单列动车组
长编动车组
重联动车组
动车组
中国标准动车组具备互联互通即不同厂家生产的相同速度等级动车组能够重 联运营不同速度等级的动车组能够相
修理费用超过该型动车组新车现价70%的符合条件
动车组报废
动车组大破
动车组中破
动车组小破
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6分Rules —Anymediapaintscrayonpenciletcmaybeusedbutnocomputergeneratedpostersareallowed. ——Postersizemustbebetween18cm×25cmand50cm×65cm. —Rememberlargerpostershavemoreimpact! ——AcompletedentryformmustbeattachedtothebackoftheposterDownloadfromwww.watersheds.org/comp/forms. ——Allpostersmustbecreatedbyanindividualstudentratherthanateamofstudents. ——The2019competitiontitleWatersheds﹣OurWaterOurHomemustappearontheposter. ——Noadulthelppermitted. POSTEREVALUATION: —Conservationmessages50% —Visualeffectiveness30% —Originality10% —Universal/Popularappeal10% PRIZES: Cashprizeswillbeawardedforfirstsecondandthirdplacewinnersineachofthefivecategories.Eachfirstplacepostergoestothenationalpostercompetition. WHOCANPARTICIPATE Thepostercontestisopentoallstudentsingrades1to12.Studentsinpublicorprivateschoolscantakepart. Categories:Grades1﹣23﹣45﹣67﹣910﹣12. RESEARCHTHETOPIC: TheInternetandlibraryaregreatplacestovisittocomeupwithanideaforyourposter.Youcanalsovisitwww.watersheds.orgtogetideasonwhatmakesagreatposterandviewpostersthathavepreviouslywon. ———Ifyourposterisinthetop3initscategoryandyouwouldliketoreceiveitbackpleasecall130﹣767﹣3070. 1WhatisthemainfunctionoftheparagraphunderthePOSTERCONTESTheading A.Toannouncethestartofanewcompetition. B.Todescribethecompetition'stermsandprizes. C.Tostatewhoisentitledtotakepartinthecompetition D.Toexplainwhythecompetition'sthemeisimportant. 2Whatisthemostimportantcriterionforjudgingtheposters A.Theaudienceresponsetotheposter. B.Theeffectivenessofthemessage. C.Thegraphicsandcoloursused. D.Theoriginalityofthedesign. 3Howmanyprizeswillbeawardedintotal A.3. B.5. C.15. D.20.
8分Mostautonomousvehiclestest﹣drivingincitiesnavigate导航byusing3﹣Dmapsmarkingeveryedgeofroadsidewithalmostcentimeter﹣levelaccuracy.Butfewplaceshavebeenmappedinsuchdetailwhichhasleftmostareaslikesmallertownsinaccessibletothosedriverlesscars. ResearchersattheMassachusettsInstituteofTechnologyMITnowhavedevelopedanewnavigationsystemthatguidesautonomousvehicleswithoutsuchaccuratemaps.Thistechnologycanhelpdriverlesscarstravelalmostanywhere. Thenavigationsystemmapsoutacoursedownunfamiliarroadsmuchasahumandriverwouldbycontinuallyscanningitssurroundingswithalasersensor激光感应器tomeasurehowcloseitistotheedgesoftheroad.Meanwhilethecaralsofollowsatoollikeasmartphonemapappthatprovidesdirectionstoitsdestinationaswellasinformationabouttherulesoftheroadsuchasspeedlimitsandthepositionsofstoplights.TeddyOrtaroboticistatMITtest﹣droveacarequippedwiththisnavigationsystemonaone﹣wayroad.Itslowlytraveledonekilometerwithoutanyhumanassistance. Thissystemassumesthatacarhasaclearpathdowntheroadbutitcanbepairedwithotherexistingcomputingtechnologytodiscoverin﹣roadobstacles障碍saysOrt.Theresearchersalsoplantobuildaversionofthissystemwhichcanspotmarkingspaintedonstreetssothatthecarcandriveontwo﹣wayroads.Self﹣drivingcarswiththisnavigationsystemmayneedothersensorstoworkindifferentconditionsAlexanderWyglinskiandelectricalengineeratWorcesterPolytechnicInstitute.Sincelasersensorsdon'tworkwellinrainorsnowthesecarsmightneedadditionalimagingtechnologiestodrivesafelyinbadweather. 1Whatmaybeaproblemformostdriverlesscars A.Theyfailintest﹣driving. B.Theirmapsareout﹣dated. C.Theyruninlimitedareas. D.Theirguidesareunreliable. 2WhatcanweinferabouttheMITnavigationsystem A.Itincludesaccuratemaps. B.Itremovesin﹣roadobstacles. C.Itworksbydetectingtheroad D.Itfeaturesasmartphoneapp. 3WhatisthepurposeofParagraph4 A.Toconfirmthetest﹣driveresults. B.Toindicatefurtherresearchareas: C.Torecognizescientists'achievements. D.Toshowthecreativityofdriverlesscars. 4Whatisthemainideaofthetext A.Autonomouscarsbeathumandriversoncountryroads. B.Navigatingself﹣drivingcarsmayworkindifferentconditions. C.Smartmappingtechnologyaddstothefunctionsofself﹣drivingcars. D.Anewnavigationsystemhelpsautonomouscarsdriveremoteroads.
10分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八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. Ihaveadreamtobeadoctor.ThreeyearsagoIambadlyinjuredincaraccident.Theambulancerushedmetothenearesthospitalthatthedoctorsandnursesdidtheirbesttolookaftermyself.FivedayslateIwasgettingbetter.Iwatchedthedoctorstoperformtheirdutiestirelesslybutofferalltheirpatientsthebesttreatmentavailable.Myexperienceinthathospitalgreatinfluencedme.EversincethenIhavemadeitmylife'sambitiontofightagainstdiseasesandsavelife.IknowmydreamwillcometrueifIkeepworkhardforit.
下列事例属于物理变化的是
如图四棱锥S﹣ABCD中底面ABCD是梯形且AB∥CD∠ABC＝90°AB＝SD＝2CD＝1∠BAD＝60°SA⊥SB． 1求证平面SAB⊥平面ABCD 2若SA＝SB求二面角A﹣SD﹣C的余弦值．
已知px2+3x﹣4≤0qx+1x﹣m＜0． 1若m＝2命题“p∨q”为真求实数x的取值范围 2若p是q的必要不充分条件求实数m的取值范围．
6分Questioningtheexistenceofaliensissomethingthatscientistshavedonefordecades.Infactmostpeopledobelievethataliensexistinsomefashion.Themainnecessitiesforlifearewaterandsomeformofenergysource.Notsurprisinglytherearesomeplanetsexoplanetsandmoonsthatfitthebill.Hereareseveralbestchancesatfindinglifeintheuniverse. ◆TRAPPIST﹣1 TRAPPIST﹣1isaplanetarysystemafewdozenlight﹣yearsawaywhosediscoverywasannouncedinearly2017.ThissystemconsistsofsevenEarth﹣likeexoplanetsorbitinganultra﹣coolstaranditisoneofourshotsatfindingpossiblelifebeyondourownsolarsystem. ◆Titan TitanisthelargestmoonofSaturnthesixthplanetfromourSun.Thismooncouldpotentiallyharborlifebutpossiblynotinthesensethatwethink.Titandoesnotexactlyfitthedescriptionofbeinginatypicalhabitablezone. Titanhaswaterandithasliquid.Itjustdoesn'thaveliquidwater.Thewateronthismooniscompletelysolidbecauseoftheextremelycoldtemperature. ◆Europa EuropaisoneofJupiter'smoonshereinourownsolarsystem.Itisanothercandidateduetoitspotentialtoholdliquidwater.Europaisthoughttohaveallthenecessitiesforlifeincludingwaterenergysourcesandtherightchemicalbuild﹣up. ◆Mars TheRedPlanetthefourthfromtheSunisprobablyoneofthemosttalked﹣aboutpotentialcandidatesforextraterrestrial地球外的lifeandevenforhumancolonization.DespitesomedifferentvoicesfindingextraterrestriallifeonMarsreallyisaseriouspossibility. Weknowbynowthatwewon'tfindlittlegreenmenoranyintelligentformoflifethatweunderstand.Howeverthereisevidencethattherewasandmaystillbemicroscopiclifeonthesmallredplanet. 1Thecommonpointofthesecelestialbodiesisthat. A.solidwaterexistsonthemrespectively B.lifemightexistoneachofthem C.theyallcontainliquidwater D.eachofthemhaslivingthingsonit 2Whichcelestialbodycouldhavelifedifferentfromhumanimagination A.TRAPPIST﹣1. B.Titan. C.Europa. D.Mars. 3WhichofthefollowingstatementsisTRUE A.Europaisthemosttalked﹣aboutpotentialcandidateforextraterrestriallife. B.TRAPPIST﹣1istheonlybodythatcontainslifebeyondthesolarsystem. C.Allthescientistsdobelievethataliensexistinsomemanner. D.ThereisproofthatlifeexistedonthecelestialbodyMars.
10分Protectingtheenvironmentisreallychallengingbutthereareactionsthatyoucantaketohelppreservethenaturalworld.Participateinbeachorrivercleanup.Whenpeoplelittertheirtrashoftenmakesitswaytoourlocalwaterwaysdestroyingthenaturalhomesofbirdsfishandothercreaturesinwater.1.Plantnativetreesandshrubs.2Onceestablishedlittleornoirrigationshouldbeneededformostwell﹣placednativeplants.Byplantingtreesandshrubsthatarenativetoyourareayou'llbeworkingwiththelocalecosystemratherthanagainstit.Checkwithyourlocalnurseryorwithyourstate'scooperativeextensionagencytolearnmoreabouttheparticularvarietiesofnativeplantsthatmightgrowwellinyourarea.3Conserveenergyinyourhomebyprovidingweather﹣strippingandcaulkingallwindowsinsulatingyourceilingsandfloors.Purchaseappliancesthatareenergy﹣efficient;lookfortheenergy﹣Stardesignation.Raiseawarenessofthreatstonature.Makesureyousharenewsaboutthethreatstotheenvironmentbothinsideandoutsideyourcommunity.Followsocialmediacampaignsandsharetheirposts.Considerjoininginralliesandprotestmarchesifyou'reable.4Eatloweronthefoodchain.Thismeanseatlessbeefhighonthefoodchainandmorerootsvegetablesandfruits.Smallerfishbeingloweronthefoodchainareusuallybetterthanlargerfish.5Shiftingtoamoreplant﹣basedstyleofeatingwillslowthedeforestationthatmeatproductionrequires.A.Reducethecarbonfootprintofyourhome.B.Trytobuyfromlocalgrowerswheneverpossible.C.Plant﹣basedfoodsrequirelessenergytoproduce.D.Plantingnativeplantshelpswithwaterconservation.E.Considerjoininginbeachorriversidecleanupevents.F.Writeletterstolocalnewspapersandcommunityblogs.G.Helpoutbyorganizingcleanupnearyourschoolduringholidays.
30分Myfamilyisbigonbaseball.Grandpa1coachedhisteamtotwonationalgames.Fatherplayedforthreedifferentcollegesandwas2askedtotryoutfortheLosAngelesAngelsoneofthetopteamsintheUS.MinutesbeforeIwasbornmy3werewatchingalivebaseballmatchonTVYoucouldsayIwas4toplaythegamebutfranklyallthrough.elementaryschoolIhatedit. Ispentmostdaysofmysummeratthebaseballparkinmyneighborhood.Ireallyshouldhavebeen5atbaseballforIpracticedalmosteverydaybutIwasnot.Iwouldn'thittheballhardorthrowit6.WhenmydadorgrandpaaskedmeifIwantedto7myanswerwasalwaysno.Finallytheystoppedgivingmea8justmakingmeplaywhetherIlikeditornot. Thissameold9continuedforyears.MydadandgrandpawouldmakemepracticeandIwouldputno10inuntilaroundGrade10.Iwasolderand11thanmy12﹣year﹣oldself.Ifinally12theirtruemotive:itwasn'tbecausetheywantedmetoimprovebutbecausetheywantedto13timewithme.Theywerejusttryingtosharea14partoftheirlifewithmeand15meinsomethingthathadbeeninthefamilyforever.16Igot.thisIstoppedtreatingitasworkand17itasabondingexperience. NowIoften18toplaybaseballwithmydadorgrandpa.The19practicesandtoughloveIgotfrommy20taughtmeausefullifelesson:findoutwhysomeonedoessomethingbeforejumpingtoconclusions. 1A.fairly B.successfully C.naturally D.accidentally 2A.still B.seldom C.even D.yet 3A.parents B.coaches C.doctors D.neighbors 4A.ordered B.prepared C.honored D.born 5A.amazed B.disappointed C.great D.mad 6A.casually B.accurately C.regularly D.clumsily 7A.practice B.relax C.leave D.quit 8A.reply B.reason C.chance D.choice 9A.project B.business C.routine D.policy 10A.effort B.wealth C.promise D.trust 11A.calmer B.smarter C.happier D.kinder 12A.searchedfor B.focusedon C.benefitedfrom D.figuredout 13A.save B.waste C.spend D.set 14A.normal B.special C.short D.general 15A.include B.spoil C.test D.judge 16A.Before B.Although C.Unless D.Once 17A.expected B.described C.treasured D.recognized 18A.fail B.offer C.forget D.hesitate 19A.forced B.regretted C.disturbed D.ended 20A.team B.school C.neighborhood D.family
10分ThreeinfivepeopleintheUKholdalibrarycard.Forsomethey'reashelterfromthestressesofday﹣to﹣daylife.1Ifyou'reconsideringjoiningyourlocallibrarynowisthetimetodoso.Andifyouneedanymoreencouragementhereareseveralreasonswhyyoushould. MostlibrariesintheUKallowmembersofthegeneralpublictocomeandgoastheylike. 2Youcanalsotakeoutalibrarycardandborrowbooksforfreealthoughyouwillinevitablyfaceafineforlatereturns. 3ImaginejusthowmanybooksyouhaveatyourfingertipswithalibrarycardTherearelotsofmodernonesaswellasoriginalsandyoucancontinuetoexpandyourlearningandvocabularyallthetime.It'sapricelessexperienceespeciallyforkidsandalsoagreatwaytoleveltheeducationalplayingfield. Librariesdevelopwithtimes.Theyhavechangedgreatlysincedecadesago.4Somelibrarieshaveappssoyoucanseewhenyourbooksareduebackandevenreservebooksinsomecases.Therearealsolibrarieswhichletyouaccessbooksindigitalformatsonyourmobiledevice﹣prettycool. Librariesareoneofveryfewspacesleftintownsandcitieswheremembersofthepubliccancometogetherandactuallybeandfeellikeacommunity.Theyhavenoticeboardstoofferserviceslikeexerciseclassesorlearningcenters.5 A.Librarieshelppeoplelearn. B.Librarieshelpeducatethekids. C.Theycreateagreatsenseofcommunity. D.Youcangoinsettledownandreadabookwithoutbeingchargedapenny. E.MostlibrariesnowhavecomputersandallowpeopletoborrowCDsandDVDs. F.Librarieshelpussavemoneyaswe'reborrowingbooksratherthanbuyingthem. G.Forothersparticularlythehomelessandpeopleinpovertyalifelinetotheworld.
8分TreessomeofthetallestintheworldtoweredaboveHannahGriffithsandhercolleagueseachmorningastheywalkeddeepintotherainforestintheMaliauBasininBorneowheretheyhadsetupasetofexperimentstolookattheecologicaleffectsofsmallcreatures:termites白蚁. Termitesgetabumrap.TheymakeheadlinesforchewingupbillionsofdollarsofpropertyeachyearintheU.S.Andtheyareresponsibleforsomethingliketwopercentofglobalcarbonemissionssimplyasaresultoftheirhugepopulationsandpreferenceforchewingthroughcarbonrichmaterials.Awholeindustryisaimingatkillingthem. Buttheyplayakeyroleinmanynaturalecosystems.Scientistshaveknownforyearsthatintropical热带的foreststermiteschewupfallenleavesanddeadwoodkeepingthefallenmaterialundercontrolandlettingnutrientsfromthedeadmaterialbackintothesystemtobeusedbyotherplantsinsectsandanimals.Buttheydidn'tknowexactlyhowimportanttheinsectswereinkeepingtheforesthealthyandfunctionalsotheyremovedtermitesfromaparticularspotintheforestandsawhowitresponded. AsluckwouldhaveitHannahGriffithsandhercolleaguesstartedtheirexperimentwhentheforestwashitbyanextremedrought干旱.Duringthenon﹣droughtyearstheysawtherewasn'tmuchdifferencebetweenthenormalplotsandtheoneswherethey'dremovedthetermites.Butduringthedroughttheeffectsweremarked.Whattheyfoundwasunexpected:inthetermite﹣richareasthesoilstayedslightlywetmoretreeseedlingssprouted抽芽andthesystemwasfullofactivitydespitethelongharddryclimate. ForGriffithsitwasonlybecausetheyhappenedtostudythedroughtthattheycouldpickouttherealimportanceoftermitestothesystemshepointsout.Andthatringsalarmbellsinmyheadshesaysbecauseitmakesmethinkwellwhatelsedon'tweknowIfwestartdamagingbiologicalcommunitieswedon'tknowwhatthatwilldo. 1WhichofthefollowingbestexplainsabumrapunderlinedinParagraph2 A.Unfairblame. B.Widepopularity. C.Publicattention. D.Specialpreference. 2Whathavescientistslearnedabouttermites A.Theydoseriousharmtotropicalrainforests. B.Theycontributealottotheecosystemtheylivein. C.Theyactasfoodforotherplantsinsectsandanimals. D.Theyspeedupthelossofnutritionintherainforest. 3WhatcanweinferfromthefindingofGriffithsexperiment A.Termiteshelpforestssurviveclimatechange. B.Termitespreferdroughtyearstonon﹣droughtones. C.Termitesbenefitmorefromtheforestduringthedrought. D.Termitesenjoyeatingtreeseedlingsduringthedrought. 4WhatdoesGriffithstellusinthelastparagraph A.Termitesarenowindangerofextinction. B.Termitesdamagebiologicalcommunities. C.Weshouldthinktwicebeforedamagingaspecies. D.Weshouldstudythedroughttoimprovethesystem.
25分假定你是李华你的新西兰朋友Terry十年前来过中国将于今年暑假再次来华旅行他发邮件向你了解这十年来中国在通讯方式购物支付和交通出行等方面发生的变化.请你回复邮件介绍相关情况. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
阻燃剂氢氧化镁[MgOH2]属于
15分HowmanyhoursdidyouspendreadinglastweekThisquestion1arriveinthousandsofAmericanhomeseveryotheryearsince1992aspartoftheUniversityofMichigan'sHealthandRetirementStudy.In2016researchersfoundthatpeoplewhoidentifiedthemselvesasregularbookreaderswere23percent2littlelikelytodiebetween2001and2012than3whoreadonlynewspapersormagazines. Youmayalreadybefamiliarwithrecentfindthatsuggestchildrenwhoreadbookswiththeirparentsseveraltimesaweekscorehigher5intelligentteststhannonreaders.Butrecentresearcharguesthatreadingmaybejustasimportantinadulthood.When6practiseoveralifetimereadingandlanguage﹣acquisitionskillscansupport7healthbrainfunctionsinbigways. Whatisitaboutreadingbooksthatboostsourbrainpowerwhereasreadingnewspapersdoesn't Foronereadingabookofanygenreforcesyourbraintothink8criticalandmakeconnectionsfromonechaptertoanotherandtotheoutsideworld9mayprovideagreaterdefenseagainsttheworsteffectsorcognitivedecay.Secondlyreadingbooksespeciallyfictionhasbeenshowntoincreaseempathyandemotionalintelligencebothofwhichareproven10helpyoulivelonger.
8分Mostchildrenarefullofthemostimpracticalschemesforbecomingpolicemenfiremenortraindriverswhentheygrowup.WhenIwasachildhoweverIdidnothavesuchordinaryambitions.Iwasgoingtohavemyownzoo.Atthetimethisdidnotseemtomeandstilldoesnotseemanunreasonableidea.MyfriendsandrelativeswhohadlongfoundmestrangebecauseIshowedlittleinterestinanythingthatdidnothavefurorfeathersacceptedthisasjustanotherexampleofmystrangeness.Theyfeltthatiftheyignoredmyoften﹣repeatedremarksaboutowningmyownzooIwouldeventuallygrowoutifit.AstheyearspassedhowevermydeterminationtohavemyownzoogrewincreasinglystrongandeventuallyaftergoingonanumberoftripstobringbackanimalsforotherzoosIwasreadytostartmyown.FrommylatesttriptoWestAfricaIhadbroughtbackaconsiderablecollectionandanimalswhichwerelivingtemporarilyIassuredherinmysister'ssuburbangardeninBournemouth.AfteranumberofunsuccessfulattemptstoconvincethelocalcounciltosupportmyplansIbegantoinvestigatethepossibilityofstartingmyzooontheislandofJerseyintheEnglishCannel.IwasintroducedtoamannamedHughFraserwhoIwastoldwasabroad﹣mindedkindlysoul.Hewouldshowmearoundtheislandandpointoutsuitablesites.SomywifeandIflewtoJerseyandweremetbyHughwhodroveustohisfamilyhomeprobablyoneofthemostbeautifuloldhousesontheisland.Therewasahugewalledgardenwithlotsofoutbuildingsallbuiltinthebeautifullocalstone.TurningtomywifeIsaidWhatamarvelousplaceforazoo!TomyreliefHughFraserdidnotthinkmyideaabsurdandaskedwhetherIreallymeantwhatIsaid.SlightlyembarrassedIrepliedthatIhadmeantitbutaddedhastilythatIrealizeditwasimpossible.Hughsaidhedidnotthinkitwasasimpossibleasallthat.HewentontoexplainthatthehouseandgroundsweretoobigforhimandsohewantedtomovetoasmallerplaceinEngland.WouldIcaretoconsiderrentingthepropertyforthepurposeofestablishingmyzooIcouldnotimaginemoreattractivesurroundingsformypurposesandbythetimelunchwasoverthebargainhadbeensealed.Thealarmdisplayedbyallwhoknewmewhenthisnewswasannouncedwasintense.Theonlyexceptiontothegeneralchorusofdisapprovalwasmysister.Althoughshethoughtitamadschemeatleastitwouldridherbackgardenoftheassortedjunglecreatureswhowerestrainingherrelationshipwithherneighbours.1Howdidtheauthor'sfriendsandrelativesrespondtohischildhooddreamA.Theyapprovedofhisidea.B.Theypaidnoattentiontohim.C.Theybelievedhe'dgiveituplateron.D.Theythoughthewasoverlyambitious.2WhatmadetheauthordecidetostarthiszooontheislandofJerseyA.Refusalbythelocalcounciltosupporthisidea.B.InspirationfromhislasttriptoWestAfrica.C.Failuretogetdonationfromotherzoos.D.Theneedforalargersuburbangarden.3WhydidHugheventuallyagreetorenthispropertytotheauthorA.Hughalsolovedanimalsverymuch.B.Hughfoundithardtomanagethepropertybyhimself.C.Hughdidn'tliketheplacesodecidedtomovetoEngland.D.Hughwasmovedbytheauthor'seagernesstoestablishazoo.4Whatcanbeinferredabouttheauthor'ssisterA.Shewasfondofchorus.B.Shewassureofhissuccess.C.Shedidn'tgetonwellwithherparents.D.Shewasbeingtroubledbyhisanimals.
15分BrookeMalorya34﹣year﹣oldmotheroftwodecidedtogetridofrarely﹣usedobjectsinherhousein2017.Shespenttwoyearsgettingridofaround25000objectsand1discoverwhatshedescribedasthebeautifulbenefitsoflivingwithless. Shewritesablogaboutherlife.Italkaboutsimplicity2formeisaboutnottyingourself﹣worthupin3thingthatweownshesays. Ididn'trealizehowheavyourbelongingswereuntilwedidn'thaveitanymore.Itwasagenuinephysicallightnesswithlettinggoandevennoweverysixmonthsorsowehave4cleaning.Itisfreedom.IthoughtIwouldbe5worrybutit'stheopposite. TheonlythingMaloryregrets6throwawayisaschoolassignmentshewroteinYear7thatinvolvedturningTheHobbit7apoem.Beyondthatthereisnotonesinglethingshesaysaddingthatsimplifyingtheirliveshasgivenherandherfamilythetimeenergyandmoney8dothingstheyotherwisewouldnothavedone. Theirrelationshipsarestrongertheyare9fitandtheytravelmoreshesays.Stuffis10realboring.I'dratherhaveexperiencesanyday.
8分KevindiagnosedwithDyslexia读写困难症rarelyspokeawordinclassandifhediditwouldbeaYesNoorMaybeinresponsetoquestions.Healwaysscoredbadlyintestsandsawnohopeforthefuture.ThatwasuntilhemetSarahanadvisoratayouthcentreKidpreneur.In2012KevinattendedacoursecalledReadySetGointhatcentre.ThecoursewasfordisadvantagedkidsinKingswood﹣alow﹣incomeareainSydney'swesternsuburbs﹣anditsgoalwastoteachthekidshowtocreatebusinessesandoffervaluetotheneighborhood.AttheendofthecourseSarahtookthekidstothelocalarea.Sheaskedvolunteerstosharetheirbusinessexperiences﹣Kevinimmediatelyputuphishand.Hischallengewastotradehishot﹣dogsellingserviceforfreebreadatabakery.AlthoughscaredKevinwasabletosharehisentrepreneur创业storywiththeshopownerandaskedifhecouldexchangehisserviceforsomebread.UnexpectedlytheshopownertoldKevinhowmovedhewasbyhisstoryandhandedhimsomebreadforfree.Bytheendoftheafternoonhisbeliefinhimselfandwhatwaspossiblewasatanall﹣timehigh.ThefollowingweekKevinsold70hot﹣dogsintwohoursandmadeover﹩200.Soonafterhedeliveredpublicspeechesin20schoolsandwasselectedaspartofhisschool'sleadershipteam.Nowheheadsabusinessgroupworkingonhowtoincreasepotentialcustomerbase.AllofhiswouldnothavebeenpossibleifKevinhadnotfoundhispassionandperseverancetoimprovehimselfandthosearoundhim.Theguidanceandtrustofhisadvisoralsohelpedtokindlehisenthusiasmtogoafterhisgoalsanddreamsinlife.1WhatwerethekidsexpectedtoachieveintheReadySetGocourseA.Toimprovetheirtestscores.B.Tocreateahot﹣dogbusiness.C.Toteachinlow﹣incomeareas.D.Tobebeneficialtothelocalarea.2HowdidKevinfeelaftervisitingthelocalbakeryA.Scared.B.Confident.C.Touched.D.Grateful.3WhatdoestheunderlinedwordkindleprobablymeanA.Inspire.B.Share.C.Continue.D.Express.4WhichcanbeasuitabletitleforthetextA.OntheRoadtoRecoveryB.TurningFailureintoSuccess.C.GrowingWealthythroughHardWork.D.FromHopelessYouthBusinessLeader
10分 Earworm Mostpeoplehavehadsongsstuckintheirheadsatsomepoint.ThescientificnameforthisisinvoluntarymusicalimageryINMIwhichsimplymeansthatpeopledonotchoosetokeepthesongsintheirheadsbutthatithappensunconsciously.Expertshavenicknamedthisconditionearwormeventhoughitisnotanactualwormanditdoesnottakeplaceintheear.1Itoccurswhenacatchytunesticksinaperson'smind.Whatmakesasongstickdependsontheindividual.Somepeoplegetstuckontheirfavoritesongswhileothersendupfixatedonsongstheyfindannoying. 2Itcanbebroughtonafterrecentlyhearingasongoritcanbetriggeredbyamemory.Althoughearwormcanhappentoanyoneatanytimecertainpeoplearemorelikelythanotherstosufferfromit.Mostcommonlymusiciansexperienceitbutpeoplewhosimplylistentomusicmorefrequentlythanothersarealsomorepronetoearworm. Noevidencehasprovenoneeffectivecurebutanythingthatdisturbsthebraincanhelp.3Forexampleactivelychewinggummightswitchthebrain'sfocusfromtherepeatingsongtothemovingjaw.Engaginginataskthatrequiresconcentrationcanremovethepeskyearwormaswell.Howeverifthetaskrequirestoomucheffortitcanactuallyprolongtheearworm.4 Whileearwormcanbeveryannoyingthereisnoevidencethatsuggestsitisactuallyharmful.5Afterallthesesongsrepeatautomaticallywithnoeffort.WhatifsciencecouldapplythisinformationtolearningWhatifeveryonecouldlearnnewthingswithouthavingtotrysohardIfscientistscanfigureouthowtotapintothistypeofmemorylearningmightlookdifferentinthefuture. A.Wehaveatendencytomovetoearworms. B.Ratherittakesplaceinthememorycentersofthebrain. C.Onepossibilitytohelpshiftthebrainistooccupyitwithanewactivity. D.Nobodyknowsexactlywhyaparticularsonggetscaughtinaperson'sbrain. E.Thisisbecausethemindtendstowandertoescapethedifficultyofthejobathand. F.Psychologistshavelongbeenlookingforwaystoturnoffthoseunwelcomethoughts. G.Infactsomeexpertsarestudyingearwormtoseewhattheycanlearnaboutmemorycenters.
25分假如你是校英文报编辑李华.你校原定于本星期五下午在302室举办的英文经典片段配音比赛EnglishDubbingContest因故需更改时间和地点.请你写一封电子邮件通知评委中的外教Mrs.Jenkins内容包括: 1.比赛更改原因; 2.更改后的安排; 3.表达歉意. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯.
8分Plantsareboring.Theyjustsittherephotosynthesizing光合作用whileanimalshaveallthefun.RightNotsomuch.Anewstudyhasfoundthatthereisalonghistoryofinteractionsbetweenantsandplants.Theantandplantco﹣evolution协同进化startedwithantsfeedingonplantsandplantsevolvingant﹣friendlyfeatures. Plantsmakeanumberofdifferentstructuresthatarespecificforantuse.Someplantshaveevolvedfeaturesthatpersuadeantsintodefendingthemfromattackfromotherinsectsandevenmammals.Theseincludehollowthornsthatantswillliveinsideorextranectar琼浆onleavesorstemsfortheantstoeat.Someantswilljustcheatandtakethenectarandrunbutsomewillstickaroundandattackanythingthattriestohurttheplant.Otherplantsgetantstohelpthemmovetheirseedsaroundbyprovidingthemwithrichfoodpacketsattachedtotheseeds.Theantwillpickuptheseedandcarryitawayeatthefoodpacketandleavetheseed﹣ofteninanutrient﹣richareawhereit'llgrowbetterandsinceit'sfartherawayfromitsparenttheywon'thavetocompeteforresources. Butscientistsweren'tsurehowtheevolutionaryrelationshipbetweenantsandplantsgotstarted.Ifevolutionisanarmsracebetweenspeciesdevelopingwaystomakeuseoftheirneighborsthenscientistswantedtoknowwhetherplantsorantsfiredthefirstshot.Itwasachicken﹣and﹣eggquestionwhetherthingsstartedwithantsdevelopingbehaviorstotakeadvantageofplantsorplantsevolvingstructurestotakeadvantageofants. Thehistoryofantsandplantsevolvingtogethergoesbacktothetimeofthedinosaursandit'snoteasytotellfromfossilswhofiredthefirstshot.Howeveritisaquestionoflittlesignificance.Scientistssaytheirstudymattersbecauseitprovidesalookathowthesewidespreadandcomplexinteractionsevolved. 1Someplantsattachfoodpacketstotheirseedsinorderto. A.rewardtheants B.makeafoolofants C.providenutritionfortheseeds D.gettheseedsmovedaround 2WhatdoesParagraph2mainlytellus A.Howplantsandantsinteract. B.Whatantsdotoprotectplants. C.Howplantsandantssurviveattacks. D.Whyplantsandantsneedco﹣evolution. 3Whichistrueabouttheevolutionaryrelationshipbetweenantsandplants A.Antsdependedmoreuponplants. B.Itcausedaraceforbetterevolution. C.Howitgotstartedwasuncertain. D.Itwasoflittlevalueforfuturestudies. 4What'stheauthor'spurposeofwritingthepassage A.Tointroduceascienceresearchmethod. B.Toinformreadersofalatestresearchfinding. C.Toarousereaders'interestinscienceresearch. D.Tocriticizepeople'straditionalviewsaboutplants.
15分Researchershavediscoveredthepeoplewiththe1healthyheartsintheworld.TheTsimanepeopleliveintheAmazonregionofBoliviaandhavealmostnoriskofseriousheartdiseasebecause2theirplant﹣baseddietandhighlevelsofphysicalactivity.Besides3haveahealthyhearttheTsimanealsohavelowbloodpressureandlowbloodsugar.This4meantheyarefreeofmanyofthediseasesandconditions5killhundredsofmillionsaroundtheworld.Astudyshowedthatan80﹣year﹣oldTsimanepersonhas6samecardiovascular心血管的ageasanAmericanintheirmid﹣50s. ThestudyontheTsimanewaspublishedinthemedicaljournalTheLancet.Studyco﹣authorDr.GregoryS.Thomasstated:Thisstudysuggeststhatsomediseasescould7avoidifpeopleadoptedsomeelementsoftheTsimanelifestylesuchaskeepingtheirbloodpressureandbloodsugarverylownotsmokingandbeing8physicalactive.Headded:Itmaynotbepossibleforpeopleintheindustrializedworld9copytheTsimanecommunity'swayoflifebuttherearecertainly10aspectoftheirdietandlifestylethatwecanbetterbringintoourlivestohelpreduceourriskofheartdisease.
在△ABC中abc分别为内角ABC所对的边且满足sinC+cosC＝2 Ⅰ求C的大小 Ⅱ现给出三个条件①a＝b②B＝③c＝2．试从中选择两个可以确定△ABC的条件写出你的选择并以此为依据求△ABC的面积S．只写出一种情况即可
函数的最小值是．
30分Aftermyhusband'sChinesekungfuschoolwasopenforaboutaweekmydaughtersandIdecidedtoseehowitwasgoing.Weweredeeply1toseetherewasn'tasinglestudentintheschool.Myhusbandwasstanding2intheschoolwaitingforcustomers. Wehadto3!Wedecidedtobehis4untilhegotsomerealones.Wethoughtitwasbettertohavefivepeopleintheschool5justhimifapasserbylookedinthewindow.Hestartedteachingus6andforms.Wefoundthatsomeofthemactuallywere7toballetmovesbutmuchmoredifficult.Itwaskindoffunbut8too!Wewereattractedbythensowe9aslearners. 10wegotactualstudentsinourschool.Thereweremanymenandteenageboysandwe11lotsofothergirlsandwomenaswell.Onespecialstudentwasa12sevenyear﹣oldgirl.Shewasgoing13andhadotherhealthproblems.Withmydaughters'helpand14thislittlegirlgottobearealkungfukid.AlthoughsheisnowasightlessgrownadultI'mconfidentshecan15herselfifsheneedsto. Iam16tosaymydaughtersaremoreconfidentineveryareaoftheirlives.Thisexperiencetaughtmeto17thingsIneverwouldhave18beforekungfu.Ihaven'tbeen19inallofmyeffortsbutI'llgivealmost20ofnicenessatry! 1A.bored B.upset C.nervous D.moved 2A.cheerfully B.aggressively C.alone D.forever 3A.act B.joke C.appear D.learn 4A.families B.workmates C.consultants D.students 5A.morethan B.inplaceof C.ratherthan D.incaseof 6A.speeches B.moves C.manners D.designs 7A.useful B.accessible C.similar D.comparable 8A.challenging B.astonishing C.relaxing D.inspiring 9A.gottogether B.signedup C.brokeaway D.stayedon 10A.Eventually B.Unfortunately C.Obviously D.Regularly 11A.discovered B.joined C.united D.attracted 12A.traditional B.homeless C.disabled D.typical 13A.blind B.deaf C.lame D.stupid 14A.threat B.encouragement C.adjustment D.approval 15A.protect B.recognize C.feed D.educate 16A.stubborn B.proud C.sensitive D.tentative 17A.applyto B.giveup C.tryout D.holdback 18A.appreciated B.predicted C.ignored D.considered 19A.helpful B.successful C.cheerful D.enthusiastic 20A.some B.either C.none D.any
下列属于“节约用水”标志的是
6分 Theguidetothelivetheater Cinderella World﹣famousSanFranciscoBalletAmerica'soldestballetcompanybringsChristopherWheeldon'smagicaladaptationofCinderella. •November13at1:30&7:30pm •KennedyCenterOperaHouse •kennedy﹣center.orgorcall2024674600 •TicketsavailableattheBoxOffice •Ticketsstartat＄25;students＄15 MaryPoppins Celebratetheholidayswithoneofthemostbelovedtalesofalltime!You'lllikethestoryofawisenanny保姆twopreciouschildrenandthefamilysheteacheshowtoloveeachother. •SpecialThanksgivingWeekSchedule: WednesdayFridayandSaturdayat2:00pm&8:00pm Sundayat2:00pm •OlneyTheatreCenter •Olneytheatre.orgorcall3019243400 •TicketsavailableattheBoxOffice •Ticketsstartat＄43 ImageChina:Confucius WithtraditionalChinesemusicbeautifulcostumes服装andexpressivedancesConfuciustellsthestoryofthegreatscholar'sjourneythroughthekingdomsofChina'sZhouDynastyandhiseffortstomaketherulersaccepthisteachings. •January13&14at7:30pm January15at1:30pm •StudioTheatre •Studiotheatre.org •TicketsavailableattheBoxOffice •Tickets:＄30﹣＄100 StraightWhiteMen ThreebrothersandtheirfathergatherforChristmasbutonebrotherseemstobeunderthepressuresofachievement.Itbecomesclearthatthesemenaredealingwithsomethinglargerthaneachother. •December9at8pm December11at4pm •OlneyTheatreCenter •Olneytheatre.orgorcall3019243400 •TicketsavailableonlineandattheBoxOffice •Tickets:＄40﹣＄110 1Howmuchwillafamilyofthreeparentsandtheir10﹣year﹣oldchildneedtopayforCinderellatickets A.＄65. B.＄55. C.＄85. D.＄75. 2WhichshowwillbeperformedinJanuary A.Cinderella. B.MaryPoppins. C.StraightWhiteMen. D.ImageChina:Confucius. 3HowdoesStraightWhiteMendifferfromtheotherthreeshows A.ItsperformersarefromChina. B.Itsticketscanbeboughtonline. C.IthasaspecialThanksgivingweekschedule. D.ItwillbeperformedinOlneyTheatreCenter.
8分AwhilebackIcaughtanewsreportonsomethingcalledcouchsurfingandthenetworkoftrustingsoulswhomakethisphenomenonpossible.Theyoffertoputuptravelersfreeofchargeandhelpthemontheirways.Atfirstitsoundedunbelievable.Imeaninvitingstrangersintoone'shomeforoneortwonightsGivemeabreak.HoweverIwasintrigued.Idecidedtoinvestigate.Theonlywaytotrulylearnaboutthisphenomenonwastodivein.SoIplannedatriptoFinlandacountryI'vealwayswantedtoexplore.Iwouldcouchsurfateverystopthere.Ifeveranyanxietyexistedwhensteppingintotheunknownitdisappearedwhenmyfirsthostmetmeatthetrainstation.ArilookedlikemyideaofatypicalFinn:tallandblue﹣eyed.Finnswerealsosupposedtobefamouslyreserved寡言少语的.Ariwasanythingbut.Hewasalivewiregivingmeanenthusiasticwelcomeandhikingwithmetohisapartmentwhereheshowedmethesleepersofaservedmeteaandengagedmeinwarmconversations.HealsohandedmeakeytocomeandgoasIpleased.Ifthiswaswhatcouchsurfingwasallabout﹣trustandfriendship﹣thenIhadgottenofftoagoodstart.AsIboardedmynexttraintocontinuemyjourneyIbegantothinkaboutthiscouch﹣surfingidea.WhaturgedthesepeopletoopentheirhomestostrangersIconcludedthattherewasadesiretolendahandtolike﹣mindedfolkswhomightenrichtheirownlives.Sevencitiesin14days.Sevenhosts.Sevennewfriends.Ifcouchsurfingtaughtmeanythingit'sthis:Mostpeoplearegoodandgenerous.WherewillcouchsurfingtakemenextWhoknowsButIcan'twaittofindout.1WhichofthefollowingbestexplainsintriguedunderlinedinthesecondparagraphA.Relaxed.B.Disgusted.C.Interested.D.Embarrassed.2WhatcanweknowaboutAriA.HewasreservedlikemostFinns.B.Hetalkedlessbuthewasfriendly.C.Hetreatedtheauthorasafriend.D.Hesawofftheauthoratthetrainstation.3WhydidpeopleoffercouchsurfingtostrangersA.Totakeanadventurewithstrangers.B.Toexchangehousesforashorttime.C.Tolearnmoreaboutothers'familylives.D.Toenrichtheirownlivesbyhelpingothers.4WhatcanbethesuitabletitleforthetextA.TravelonTrustandCouchesB.AFreeTravelinFinlandC.ExperiencesinStrangers'HousesD.APlanforCouchSurfing
10分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. DearGeorge It'sbeenaweekafterweleftyourfamilyandwearenowbackhome.Thankyouverymuchforshowingthemaroundyourcityandprovidingusforthewonderfulmeals.AfterwesaidgoodbyetoyouwewenttoWashingtonD.C.therewestayedforthreeday.Mybrotherwassomuchfondofthemuseumstherethathebeggedmyparentstostayinganothercoupleofdays.HowevermyfatherhadtoreturntoworkonMondaysoweflybacklastSaturdayafternoon.Itwasrealaniceexperience.Ifyou'dliketomaketriptoourcitysomedayIwillbemorethanhappytobeyourguide. Yours LiHua
8分EverydayAmericansthrowaway500millionplasticstrawsenoughtocircletheEarthtwiceorfill125schoolbuses.Madefromfossilfuelstheyarealmostneverrecycledbecausethey'retoosmallandcouldbemadefromseveraldifferenttypesofplastic.Theysimplycontributetothemassiveproblemofplasticpollution.Eightmilliontonsofplasticisdumpedintotheoceanseveryyear. Plasticstrawsarenowthetargetofagrowingmovementtoreducetheiruse.PossiblythefirstofsuchcampaignsBeStrawFreewasstartedin2011byMiloCresswhowasonlynineyearsoldatthetime.InoticedthatwheneverIorderedadrinkatarestaurantitwouldusuallycomewithastrawinitandIdon'tusuallyneedastrawhesaid.Thisseemedlikeahugewaste. CressstartedaskingrestaurantsinBurlingtonVermontwherehelivedatthetimetostopprovidingstrawsautomaticallytocustomersandmakethemoptionalinstead.Manyagreedandhisrequesthadaneffectnationwide. Theanti﹣strawcampaignhascrossedbordersintotheUKwherestrawshavebeenincludedinagovernmentplantobanallplasticwasteby2042. Offeringalternativesormakingplasticstrawsoptionalratherthanbanningthemcompletelyisacommoncharacteristicamongthesecampaigns.WedonotwanttomakepeoplefeelbadforneedingorevenwantingtouseastrawintheirdrinksaidJackieNunezfounderofTheLastPlasticStraw.Therearemanyotherpracticalalternativestosingle﹣useplasticdrinkingstrawsthatarelessharmfultotheenvironmentwildlifeandhumans.shesaid. Somepeopleusestrawstoreducethedamageofsugaryoracidicdrinkstotheirteethorduetospecialrequirements.BynotregardingthestrawasanevilCresssaysIamnotouttobanstraws.Ithinkit'smuchmoreeffectivetoencouragepeopletomakethechoicenottousethem.Voluntaryparticipationencouragespeopletospreadtheword.Forcingpeopletodothingsisnotalwaysthemosteffectivewaytomakeachange. 1Whatcanweinferfromthefirstparagraph A.Plasticstrawsarenotworthrecycling. B.Smallplasticstrawsareaseriousproblem. C.Eightmilliontonsofplasticarerecycledfromstraws. D.Americansliketotransportplasticstrawsinschoolbuses. 2WhichoneofthefollowingstatementsaboutMiloCressistrue A.HefoundedBeStrawFreetobanplasticstraws. B.HeexpectedEnglandtobanallplasticwasteby2042. C.HeaskedAmericanrestaurantstostopprovidingstraws. D.Hemaybethefirsttolaunchactivitiesforusinglessstraws. 3What'sJackie'sattitudetowardbanningstrawstotally A.Tolerant. B.Sympathetic. C.Approving. D.Opposed. 4WhatcanwelearnfromCress'swordsinthelastparagraph A.Strawsarehealthytoourteeth. B.Itisabettergoaltoforbidusingplasticstraws. C.Whetherplasticstrawsareuseddependsoncustomers. D.Peopleneedtobeforcedtogiveupusingplasticstraws.
25分你校昨天举行了年度校园科技节Science&TechnologyDay.请你写一篇日记内容包括: 1.科技节的主要内容; 2.你所参加的活动及原因; 3.你的感想. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯.
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