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请写出下列反应的化学方程式，并注明反应的类型（化合、分解、置换、复分解）． （1）铝和氧气的反应 ，反应类型 ， （2）实验室用锌和稀盐酸制取氢气 ，反应类型 ．
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在下列中学化学中常见物质的转化关系图中反应条件及部分反应物和产物未全部注明已知A.D.为金属单质其他
下列说法正确的是
热化学方程式中，如果没有注明温度和压强，则表示在标准状况下测得的数据
热化学方程式中，化学式前面的化学计量数既可表示微粒数，又可表示物质的量
书写热化学方程式时，不仅要写明反应热的符号和数值，还要注明各物质的聚集状态
凡是分解反应都是吸热反应，化合反应都是放热反应
写出下列反应的化学方程式并在括号中注明反应的基本类型化合反应或分解反应.1铁丝在氧气中燃烧反应2过氧
根据要求写出下列化学方程式并注明基本反应类型⑴铁和硫酸铜溶液反应__________________
下列说法正确的是
热化学方程式中，化学式前面的化学计量数既可表示微粒数，又可表示物质的量。
热化学方程式中，如果没有注明温度和压强，则表示在标准状况下测得的数据。
书写热化学方程式时，不仅要写明反应热的符号和数值，还要注明各物质的聚集状态。
凡是化合反应都是放热反应，分解反应都是吸热反应。
⑴目前出现的不粘锅是表面有一种叫做特氟龙的涂层实际就是号称塑料王的聚四氟乙烯试写出合成特氟龙的化学方
请写出下列反应的化学方程式并注明反应的类型化合分解置换复分解.1铝和氧气的反应反应类型2实验室用锌和
化学方程式是学习化学的重要工具之一写出下列反应的化学方程式并指明反应类型化合分解氧化之一1用氢气做燃
写出下列反应的化学方程式并在括号内注明基本反应类型1煅烧石灰石制生石灰_______________
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HowtoGettheBestHotelDeal Takingtheentirefamilyonvacationcanaddupquickly﹣﹣﹣﹣flightsrentalcargasmealssnacksandofcoursehotels.HoweverbydoingsomeresearchandusingthreelittlewordsyoucouldendupsavingalotofmoneyonaccommodationsFirstsearchhotelbookingsiteslikeTripAdvisororExpediaandcheckoutthehotelratesinyourlocationforthedatesyouwouldliketobook.Takedownallthepricesyoufindonlineforthathotel.Butevenifyoufindastealofadealoraspecialdiscountdon'tpressthebookbuttononthewebsitejustyet. Afterresearchingpricesonlineexpertssaythebestwaytogetthelowesthotelrateistocallthehoteldirectly﹣﹣﹣﹣notanyofthecustomerserviceor1﹣800numbersthatcouldbelistedasacontactnumberespeciallyforachainhotel.Thenyou'regoingtodropsomemagicwords.Awhileyoumightbetemptedtoaskforthebestdealorthelowestrateyoursecretweaponhereistousethephrasecheapestnonrefundablerate.AccordingtoexpertsatTravel+Leisurethatphrasetriggershotelstafftosearchfortheroomthatwillcostyoutheleastforyourvacation. Ifyoudoenduptryingtonegotiateabetterpricementionthenumbersyoufoundonlineandthenreducethosepricesby20percent.Apparentlyhotelspayaheftyfeetobelistedonhotelbookingsitesandthat20percentcouldactuallymeanmoremoneythantheywouldgetifyoubookedthroughoneofthem. Justdon'twaituntilthelastminutetoscoreadealbecausethatcanleadtopayingmorenotless.FredLalondefounderofthetravelserviceHoppertoldTravel+Leisurethatthebestdealsonhotelsareusuallyavailabletwotothreemonthsaheadofthevacationdatepotentiallysavingyoumorethan﹩270foraneight﹣daystay. 1WhatdoestheunderlinedpartthreelittlewordsinParagraph1referto? A.Aspecialdiscount B.Thebestdeal C.Thelowestrate D.Cheapestnonrefundablerate. 2Accordingtothepassagethepreferredwaytogetthebesthoteldealisto. A.callthetargethotelstobargainwiththestaff. B.collectandcomparethepricesfoundonline C.bookhotelsjustbeforeyourdeparturetime D.turntohotelbookingsitesforadiscount
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Onedayin1995alargeheavymiddle﹣agedmanrobbedtwoPittsburghbanksinbroaddaylight.Hedidn'twearamaskandhesmiledatsurveillancecamerasbeforewalkingoutofeachbank.LaterthatnightpolicearrestedasurprisedMcArthurWheeler.WhentheyshowedhimthesurveillancetapesWheelerstaredindisbelief.ButIworethejuicehemumbled.ApparentlyWheelerthoughtthatrubbinglemonjuiceonhisskinwouldmakehiminvisibletovideotapecameras.Afteralllemonjuiceisusedasinvisibleinksoaslongashedidn'tcomenearaheatsourceheshouldhavebeencompletelyinvisible. ThecasecaughttheeyeofthepsychologistDavidDunningatCornellUniversitywhoenlistedhisgraduatestudentJustinKrugertoseewhatwasgoingon.Theyreasonedthatwhilealmosteveryoneholdsfavourableviewsoftheirabilitiesinvarioussocialandintellectualfieldssomepeoplemistakenlyassesstheirabilitiesasbeingmuchhigherthantheyactuallyare.ThisillusionofconfidenceisnowcalledtheDunning﹣Krugereffectanddescribesthecognitivebiastoinflateself﹣assessment. ToinvestigatethisphenomenoninthelabDunningandKrugerdesignedsomecleverexperiments.Inonestudytheyaskedundergraduatestudentsaseriesofquestionsaboutgrammarlogicandjokesandthenaskedeachstudenttoestimatehisorherscoreoverallaswellastheirrelativerankingscomparedtotheotherstudents.Interestinglystudentswhoscoredthelowestinthesecognitivetasksalwaysoverestimatedhowwelltheydid﹣byalot.Studentswhoscoredinthebottomestimatedthattheyhadperformedbetterthantwo﹣thirdsoftheotherstudents! Sureit'stypicalforpeopletooverestimatetheirabilities.Theproblemisthatwhenpeopleareincompetentnotonlydotheyreachwrongconclusionsandmakeunfortunatechoicesbutalsotheyarerobbedoftheabilitytorealizetheirmistakes.Inasemester﹣longstudyofcollegestudentsgoodstudentscouldbetterpredicttheirperformanceonfutureexamsgivenfeedbackabouttheirscoresandrankings.Howeverthepoorestperformersshowednorecognitiondespiteclearandrepeatedfeedbackthattheyweredoingbadly.Insteadofbeingconfusedorthoughtfulabouttheirincorrectwaysincompetentpeopleinsistthattheirwaysarecorrect.AsCharlesDarwinwroteinTheDescentofMan1871Ignorancemorefrequentlybegetsconfidencethandoesknowledge. Interestinglyreallysmartpeoplealsofailtoaccuratelyself﹣assesstheirabilities.AsmuchasD﹣andF﹣gradestudentsoverestimatetheirabilitiesA﹣gradestudentsunderestimatetheirs.Thedifferenceisthatcompetentpeoplecananddoadjusttheirself﹣assessmentgivenappropriatefeedbackwhileincompetentindividualscannot. 1WhichofthefollowingstatementsabouttheDunning﹣KrugereffectisTRUE? A.Theeffectistrueforeveryoneindailylife. B.Itsuggeststhatmostpeoplelackcognitiveabilities. C.Somepeopleareoverconfidentabouttheirabilities. D.Theconclusionisdrawnbasedonaseriesofbankrobberies. 2Whatdothecollegestudents'behaviorsmentionedintheexperimentsprove? A.Feedbackplaysasignificantroleinestimatingone'sability. B.Incompetentpeoplehavearigidattitudetowardstheirchoice. C.Goodstudentscanpredicttheirfutureperformanceaccurately. D.Peoplecan'trelyontheirpreviousbehaviortomakeadjustments. 3TheunderlinedwordbegetsinParagraph4canbereplacedby. A.givesriseto B.takesadvantageof C.makesupfor D.breaksawayfrom 4Whatcanweinferfromthepassage? A.Realknowledgeisknowingtheextentofone'signorance. B.Itisdifficultforpeopletoevaluatetheirrealcompetence. C.Illusionofconfidenceisthemajorsourceofpeople'sfailure. D.Thosewithgreatabilitiesoftenhavealowopinionofthemselves.
请阅读下面文字和图表并按要求用英语写一篇150词左右的文章Chinesetourismindustryisrelativelyyoungbutveryattractive.With288billiondollarsspentworldwidein2018Chinesetourists'spendingrepresentsaquarterofglobaltourismspending.NowadaystravelingiseasierthansomeyearsagoandvisitingaforeigncountryisascommonasmovinginChina.ForthisreasonwhenChinesetouristsplantheirholidaytheyoftenhavethedilemmawhetheritisbettertomoveabroadortostayinChina.Chinahasthelargestoutbound出境的tourismmarket.Indeedmorethan71millionChinesetouriststraveledabroadin201815percentmorethanthepreviousyear.Thisphenomenonisduetodifferentfactorsthefirstonebeingrisingincomes.Themiddle﹣classhasthemeanstotraveloutsideChina.Thesecondoneisanincreaseinonlineinformationwithacontentofquality.WordofmouthandrecommendationsfromfriendsarethemostfavoredsourceofinformationofChinesetourists.Thethirdfactorwouldbefriendliervisapoliciesfromforeigngovernments.[写作内容]1.用约30个单词概括上述信息的主要内容2.结合上述信息用约120个单词发表你的观点内容包括你对'境外旅游热'持什么观点?说明你的理由至少两点若你所在城市正大力推广本地旅游业你认为应该采取哪些促进措施?[写作要求]1.写作过程中不能直接引用原文语句2.作文中不能出现真实姓名和学校名称3.不必写标题.[评分标准]内容完整语言规范语篇连贯词数适当.
Researchintoworkingmemory Whenyouneedtorememberaphonenumberashoppinglistorasetofinstructionsyourelyonwhatpsychologistsandneuroscientistsrefertoasworkingmemory.It'stheabilitytoholdandprocessinformationinmindoverbriefintervals.Wecankeeponlyacertainamountofinformationinmindatanyonetime.Thesecouldbefiguresletterswordsorotherunits.It'sforthingsthatareimportanttoyouinthepresentmomentbutnot20yearsfromnow.Here'sabriefintroductiontowheretheresearchstandscurrently. Workingmemoryversuslong﹣termmemory Workingmemoryisrelatedtotemporaryactivationofneurons神经元inthebrain.Howeverlong﹣termmemoryisthoughttoberelatedtophysicalchangestoneuronsandtheirconnections.Thiscanexplainthe short﹣termnatureofworkingmemoryaswellasitsgreatersensitivitytointerruptionsorphysicalshocks. Long﹣termmemoryischaracterizedbymuchlargerstoragecapacity.Itcancontaininformationaboutaperson'sexperiencesforalifetime.Researchershavelongregardedworkingmemoryasagatewayintolong﹣termstorage.Repeatinformationinworkingmemoryenoughandthememorycanbecomealong﹣termmemory. Howdoesworkingmemorychangeoveralifetime? Performanceonassessmenttestsofworkingmemoryincreasesteadilythroughoutinfancychildhoodandtheteenageyears.Theninyoungadulthoodperformanceisatthehighestlevel.Ontheotherhandworkingmemoryisoneofthecognitiveabilitiesmostsensitivetoagingandperformanceonthesetestsdeclinesinoldage. Theriseandfallofworkingmemorycapacityoveralifespanisthoughttoberelatedtothenormaldevelopmentanddeclineoftheprefrontalcortex前额皮质inthebrainanarearesponsibleforhighercognitivefunctions.Anydecreaseinthefunctioningofthisareaislikelytoaffectmanydifferentaspectsofcognitionemotionandbehavior. Improvingyourworkingmemory Theimprovementofworkingmemoryisamajordrivingforceofcognitivedevelopment.AtheoryofcognitivearchitecturecalledGlobalWorkspaceTheorysuggeststhatinformationheldtemporarilyinmindispartofaglobalworkspaceinthemindwhichconnectstomanyothercognitiveprocessesandalsodetermineswhatweareconsciousofinanygivenmoment. Thereissomeevidencethatit'spossibletotrainyourworkingmemoryusinginteractivetaskssuchassimplegamesforchildrenthatinvolvememoryability.Ithasbeensuggestedthatthistraininghelpschildrenimprovescoresonothertypesoftaskssuchasthoseinvolvingvocabularyandmathematics. Workingmemoryiscentraltothefunctioningofthemind.Itrelatestomanymoregeneralabilitiesandoutcomes﹣thingslikeintelligenceandacademicachievements.Henceithasbecomeincreasinglyimportantinsolvingthemysteryofunderstandingconsciousnessitself. Researchintoworkingmemory 1of workingmemory Workingmemoryreferstotheabilitytokeepthingsinmindovertheshorttermwhichhasashorterstoragecapacity. 2betweenworkingmemoryandlong﹣term memory •Long﹣termmemorywhoseinformationis3concernsphysicalchangestoneurons. •Workingmemoryis4totemporaryinterruptions. Oncerepeatedalotit5intolong﹣termmemory. Changesofworkingmemoryoveralifetime Afterstableimprovementperformanceofworkingmemoryreachesa 6inyoungadulthood.Howeveritfallsinto7 inoldage. Significanceof improvingworkingmemory •Theimprovementofworkingmemorycangreatly8 thedevelopmentofcognition. •Interactivetaskshelpimproveworkingmemory.Childrenwhoachievehighscoresinvocabularyandmathsareliving9. Conclusion 10itscentralroleinourmentalliferesearchinto workingmemorymatters.
Thereisa1930s﹣oldrestaurantinmyhometownthathasdonelittletoupdateitselfoverthepast80years.Thisispartofitscharmasisthewoodenphonebooththatsitsneglectedintheageofthecellphone. Ahthephonebooth.Weneeditnowmorethanever. Formeitsymbolizesthatphonecallswereonceprivateaffairseveniftheinformationbeingsharedwasnotsensitiveinanyway.Itwassimplyassumedthataphoneconversationwasmeantfortwopeopleandtwopeopleonly.Inpublicplacesthismeantturningtothephonebooth﹣aprivatechamberwhereonecouldconverseinpeacewithoutbeingoverheard. Evenathomephonecallsusedtoberegardedasprivate.Growingupinthe1960swehadonephoneinthehouse﹣fixedtothekitchenwall. AsakidIdidn'tgetormakemanycalls.Idohoweverrememberansweringthephoneaskingfortheidentityofthecallerandthenhandingthephonetomymom.She'dtakeitsayHelloMrs.FlaubertandthenonemomentpleaseassheplacedherhandoverthereceiverturnedtomeanddirectedThisisforme.Whydon'tyougooutsideandplay? Flash﹣forwardtowhatcellphoneshavedonetothisidyll.Withinthespaceofveryfewyearsprivateconversationshavebecomepublicdeclarationandbeingoverheardseemstobethepoint.Alargepartoftheproblemofcourseisthatwenowcarryourphoneswithusandthereflex反射toanswerthedeviceassoonasitringsisaresponsePavlovwouldhaveappreciated. Buttheinformationisrevealed!NotlongagoIwassittinginBoston'sSouthStationwaitingformytrain.AfterpurchasingasandwichIsatdownatatablenearamanwhowasonhiscellphone. LetmeparaphrasewhatthemanhadtosayYesthat'sright.Theredandyellowroses.ThatwillbeaVisa.Thenheproceededtorecitehiscardnumberandexpirationdatebeforesigningoff. Istaredunbelievablyatthefellow.HeglancedatmeandaskedWhat? MyresponsewasimmediateIrecitedhiscardnumberbacktohimalongwiththeexpirationdate. Thereisnomoreprivacynolongerasenseofpersonalbordersorlimitsandthecellphonehasbecomealoudspeaker. ToreturntophoneboothsWhydidtheydisappear?AndshouldyouthinkaphoneboothhasnovaluetodayIsawoneoneBaygoingfor＄4750. 1Whydoprivateconversationsturnintopublicdeclarationaccordingtothepassage? A.Phoneboothshavediedoutinmodernlife. B.Peoplelackasenseofpersonalbordersorlimits. C.Thecontentofphonecallsisnotthatsensitive. D.Itisconvenientforpeopletoreachforcellphones. 2BydescribingwhathappenedinBoston'sSouthStationtheauthorindicatesthat. A.it'sridiculoustoanswercellphonesinpublicplaces B.it'simpolitetooverhearothersansweringcellphones C.it'snecessarytokeepasafedistancefromotherswhenansweringphones D.it'sinappropriatetotouchonpersonalinformationincellphoneconversations 3Whatcanweconcludefromthepassage? A.Pavlovisinfavorofansweringcellphonesinstantly. B.Somethingseeminglyold﹣fashionedholdsitscharmtoday. C.PhoneboothsareverypopularwithconsumersontheInternet. D.Peopleusedtolackasenseoftrustandsecurityinthe1960s.
下列试验中发生了化学变化的是
InlateMarchof2018atearintheearthabout15meterswideand20metersdeepsuddenlyappearedinKenya.Itcutacrossroadsandevensplithousesintwo.Thiscrackappearedoutofnowhereafterheavyrainsandanincreaseinseismic地震的activity.Somescientistsbelievethatit'sfurtherproofthatAfricaisslowlysplittingapart. OnceaverylongtimeagoAfricaandSouthAmericawereonelandmassbeforetheyseparated.SimilarlyonedayintheverydistantfuturealargepartofEastAfricawillsplitofffromtherestofthecontinent.Thiswillcreateanewlandmassandanewocean.Thebreakupisaresultofplatetectonics板块运动thegradualmotionofdifferentpartsoftheEarth'scrust地壳. WhenplatesoftheEarthseparateandtearawayfromeachotheritiscalledrifting开裂.Theresultisariftvalley.Scientistsdon'tunderstandtheexactmechanismbehindriftingbuttheresultsareeasytoobserveintheEastAfricanRiftSystemEARS.That'swhystudyingthispartoftheworldissoimportant. TheEastAfricanRiftSystembeginsinthenorthinEthiopiawherethreeplatesaremovingawayfromeachother.TwoofthemarecontinentalplatestheAfricanandArabianplates.Theyaretectonicplatesthathavealargelandmassabovewater.ThethirdistheSomaliplateconsideredaminorplatewhichissteadilymovingawayfromtheothertwo.Butdon'tplanonvisitingthenewoceananytimesoon.Theplatesaremovingatarateofabout6millimetersayear.Atthatspeedmillionsofyearswillpassbeforeanewoceanisformed. EARSisnotallbadnewsforKenya.Ariftvalleyiscomposedofanareawherethereisincreasedvolcanicactivityandthinnedplanetarycrust.Thismakesiteasiertotakeadvantageofthepowerofsteam.ForKenyathismightbeananswertothecountry'selectricalproblems.Thedroughtconditionsthatfrequentlyoccurtheremakeitdifficulttoproduceenergy.Butthegeothermal地热的powerplantsgoingonlinein2019willallowthemtoproducecleanenergywithverylittlewater. 1Whatcanbeconcludedfromthepassage? A.AwarwillcertainlybreakoutinAfrica. B.AdisasterwillsuddenlystrikeAfrica. C.AgeologicalstructurewillchangeinAfrica. D.AnewcountrywillcomeintobeinginAfrica. 2Whichofthefollowingplatesmightbesurroundedbywateraccordingtothepassage? A.EastAfrica. B.Somaliplate. C.Arabianplate. D.Africaplate.
The9thChinaInternationalGardenExpo May18﹣﹣﹣November18Beijing News Green﹣FingeredBeijingGardenExpoOpenstoPublic InternationalGardenExpoOpensinBeijing 13000VolunteersPrepareforBeijingGardenExpo BeijingGardenExpoEncouragesFamilyGardening Coverstories LandRehab BeijingGardenExpopresentsacombinationoftraditionalbeautyandenlightenedurbandevelopment AfricanPavilionsOpenforBusiness BeijingGardenExpo'sInternationalExhibitionAreastilldeveloping ImpetusforDevelopment Foryourinformation Openingtime800a.m.﹣930p.m. LocationBeijingGardenExpoParkFengtaiDistrict Ticketprice100yuan＄16onnormaldays150yuan＄24on16designateddays Transportation ﹣﹣﹣SubwayGardenExpoParkStationonLine14 ﹣﹣﹣ShuttlebusStartfromBeijingWestRailwayStationandBeijingSouthRailwayStation ﹣﹣﹣BusLine310843327385 BeijingGardenExpoinNumbers Inphotos GardenValleyFormerlya30﹣meter﹣deeplargesandpitcovering20hectaresoflandareaintheGardenExpoParkonthewesternbankoftheYongdingRiverinBeijing'sFengtaiDistrictCHINANEWS.COM GinkgoAvenueintheGardenExpoParkCHINANEWS.COM European﹣StyleGardenSHIGANG BeijingParkXINHUAHongKongGardenCHINANEWS.COM TaiwanGardenCRI HarbinParkItfeaturesthewhiteRussian﹣stylechurchoneofthecorelandscapesintheparkCHINADAILY HefeiParkFourstonelionsaroundthememorialarchrepresentmajestyanddecency.ThevividstonelotuscarvedonthearchstandsforincorruptibilitywhichcorrespondswiththedesignconceptoftheparkCHINADAILY Relatedreports 2011InternationalHorticulturalExposition 2010ShanghaiWorldExpo BeijinginPictures 1WhichofthestatementsisTRUE? A.VisitorscantakesubwayLine14startingfromBeijingWestRailwayStation. B.ThetwophotosofGinkgoAvenueandHarbinParkcomefromthesamesource. C.VisitorscanappreciatethebeautyofthestonelotusinHefeiParkattheExpo. D.Afamilyofthreewillpay300yuantovisittheGardenExpoonanyday. 2Thepurposeofthispassageisto. A.offerinformationabouttheGardenExpo B.introducevolunteerstotheGardenExpo C.promotethegardeningindustryinChina D.attractmorevisitorstotheGardenExpo
RecentlyIrolledintoalocalrestauranttotryanImpossibleBurgeranall﹣plantmeat﹣likepieinventedbytheSiliconValleycompanyImpossibleFoods.It'sfamousforhavingaweirdlychewyevenbloodymeat﹣likequalityasurprisingverisimilitude逼真thathasmadeitperhapsthecountry'smostfamousburgerasNewYorkmagazinerecentlywrote.OnebiteintoitsgorgeoussmokyflavorandIwasconvinced. Thisisgoodnewsbecausethetimehascometomass﹣producefake假的meatfast.Why?Becauseinthefighttoeaseclimatechangemeatreplacementisoneofthelowest﹣hangingfruits. Meatproductionchewsuplandandletsoutmethane沼气bythekilotonaccountingforabouttwo﹣thirdsofallgreenhousegasemissionsfromagriculture.AUniversityofOxfordstudyrecentlyfoundthattokeepglobalwarmingbelow2degreesthiscenturyweneedtobeeating75percentlessbeefand90percentlessporkglobally.WithoutconcentratedchangewereallyriskgoingbeyondkeyenvironmentallimitsMarcoSpringmannoneoftheOxfordresearcherswarnsme. Dietsareculturallyenshrined神圣的sochangingthemwillbehard.Fakemeatcanhelpcamouflage掩饰thatdramatictransformationwithslightadjustment. Stilleventhemostexceptionalsubstitutesformeatfaceahugechallengeifthey'regoingtoreplace75to90percentofbeefandpork.ThefirsttasteofanImpossibleBurger﹣amomentwhenlowexpectationsworkapowerfulmagicintheproduct'sfavor﹣isonething.Buthowdoyoukeepmeat﹣eatersaskingformoreaftertheirsixthandtheir26th? Fortunatelythesciencehereisplayinganimportantrole.ImpossibleFoodsowesmuchofitsappealtoabioengineeringprocessthatturnsoutbigblood﹣redtanksofhemeacrucialmolecule分子thatgivesveggie素食主义者meatthatslightlymetallicbloodyflavorasDavidLipmanchiefscienceofficerofImpossibleFoodstellsme.Meanwhileculturedmeatcreatedbygrowingactualanimalcellsinabasinisbecomingareality.InNewYorkthescientistsatOceanHuggerFoodshaveengineeredaprocesstotransformtomatoesintomocktuna.AndoverintheNetherlandsacompanycalledTheVegetarianButcherisdevelopingaNespresso﹣styledeviceYoupourinabagofvegetableprotein蛋白质andoutpopsfakemeat.Thecompanyaimstoreleaseitintwoyears. Togettotruemassadoptionfakemeatwillneedtocompetefavorablywiththerealthingonmultiplefronts.ImpossibleFoods'goalistodrivethepriceofitsproductbelowthatofSafeway's80/20hamburgermeatatwhichpointpeoplewillsimplyvotewiththeirwallets.Thenewindustryalsowantstoimproveonanimalfleshinvariousways.Fakemeatwilloutcompetetraditionalmeatbecauseyouwon'tneedtorefrigerateitifyou'remakingitasyougoco﹣founderNikoKoffemansays.That'dgiveunmeatanenormousadvantageforenergy﹣poordevelopingregions.Plusfakemeatcouldprovidemorechoices.YoucouldhaveverysoftandtendermeatforelderlypeopleKoffemanadds.Youcouldhaveacustommeatforwhateveryouneed. Wecouldspeedthisdietaryshiftwithsmartpublicpolicytoo.Beginningin2006NewYorkCitycutthenumberofadultsconsumingoneormoresugarydrinksperdayby35percentbyrunningappealingpublicservicecampaignsandrequiringthelabelingoftheirhighcaloriecounts含量infast﹣foodrestaurants.ImaginesimilarmeasurespromotingfakemeatSavetheplanetbitebybite.Saveyourhealthtoo.Speakingofyourconscienceindustrial﹣scaleanimalfarmingisethically道德上unpleasant. Youcantelltheworldisshiftingthiswaybecausetheranchers牧场主arenervous.LastyeartheUSCattlemen'sAssociationaskedthegovernmenttodefinemeatasaproductobtaineddirectlyfromanimals.Thatanxietywhichisnodoubtcausedbysciencegoestoshowthatthisgrandshiftisn'timpossible. 1TheauthorwasconvincedbytheImpossibleBurgerbecause. A.itlookslikeatraditionalmeatburger B.itcontainsnomeatbuttasteslikemeat C.itsflavorisdifferentfromthatofnormalones D.morevegetablesareusedintheburger 2Whatdoestheauthormeanbysayinglowesthangingfruitsinparagraph2? A.Ataskthatisdifficulttofulfill. B.Anapproachthatiseconomical. C.Aproductthatisenvironment﹣friendly. D.Agoalthatiseasytoachieve. 3Theauthorismostlikelytoagreethat. A.fakemeatisworthyofinvestmentforitsgreatpotential B.fakemeatcannotchangepeople'sdietaryhabits C.adeclineinmeatconsumptioncanrelieveglobalwarming D.fakemeatwillreplacerealmeatbecauseofitslowerprice 4Fakemeathasanadvantageovertraditionalmeatinthat. A.fakemeatwillnotbenecessarilystoredinarefrigerator B.thepriceoffakemeatwillbeone﹣fourthofthetraditionalmeat's C.fakemeatwillwinovertheolderpeoplethankstoitsquality D.fakemeathasabloodyflavorthatisnotfoundintraditionalmeat 5Whatcanbeinferredfromthelastparagraph? A.TheUSgovernmentdoesn'tgiveenoughsupporttoranchers. B.Theworldwillprobablyaccepttheideaoffakemeat. C.Peopledon'tliketoeatmeatproducedbytheranchersnow. D.Thedefinitionofmeathasbeenrevisedbecauseoffakemeat. 6Whichisprobablythesuitabletitleforthepassage? A.Let'sspeedupthedietaryshift B.Let'swelcomethefakemeat C.Fakemeatortraditionalmeatmustwechoose? D.Traditionalmeatanenvironmentkiller
UndertheBeltofRoadconcreteprojectsandmeasuresarewithlocaldemandstoaccelerateeconomicdevelopment. A.parallel B.consistent C.paralyzed D.equivalent
NotonlydoesEnglishhavemanygrammaticalrulesbuttherearealsohundredsofexceptionstothoserulesonecanmasteronlythroughyearsofdedicationandenergy. A.where B.that C.which D.what
Whenaskedwhetherthereisanidealnumberofchildrentohavemanyparentsgivemultiplesometimesconflictinganswers.IntheUnitedStatesnearlyhalfofadultsconsidertwotobetheidealnumberofchildrenaccordingtoGallupsurveyswiththreeasthenextmostpopularoptionpreferredby26percent. Thetwo﹣childidealisamajordeparturefromhalfacenturyagoIn1957only20percentofAmericanssaidtheidealfamilymeanttwoorfewerchildrenwhile71percentsaiditmeantthreeormore.Theeconomyseemstohaveplayedsomeroleinthisshift.StevenMintzahistorianattheUniversityofTexasatAustinsaysthatnumberdroppedasthecostofraisingchildrenroseandasmorewomenenteredtheworkforceandfeltagrowingsenseoffrustration沮丧aboutbeingreducedtochildbearingmachines. __________AsaparentwhoprizeshisownmentalandphysicalhealthsaysRobertCrosnoeasociologyprofessorwhoisalsoattheUniversityofTexasatAustinIhadtostopattwobecausethisnewstyleofintensiveparentingthatpeoplefeeltheyhavetofollowthesedaysreallywearsoneout. Atthesametimehavingonlyonekidmeansparentsmissoutontheopportunitytohaveatleastoneboyandonegirlanarrangementtheyhavetendedtopreferforhalfacentury.Thoughinthelongrunoneresearcherfoundthathavingallgirlsorallboysdoesn'tmeaningfullyaffectthehappinessofmotherswhowantedatleastoneofeach. Perhapsthemostmeaningfuldifferenceisn'tamatterofgoingfromonetotwochildrenortwotothreebutfromzerotoone.Havingjustonechildmakesvariousaspectsofadults'lives﹣howtimemoneyemotionandmindareusedandhownewsocialnetworksareformed﹣child﹣centeredsaysKeiNomaguchiasociologistatBowlingGreenStateUniversity.Ifyouwanttoenjoyadult﹣centeredlifeloveexpensiveleisureactivitiescherishcloserelationshipswithyourpartnerandbothyouandyourpartnerwanttodevoteyourtimetoyourcareerszerokidswouldbethechoice. Mothersofcoursestandtolosemorethanfatherswhentheyhavekidsintheirhousehold.Havingchildrenismorestressfulforwomenthanitisformenandmotherssufferprofessionallyafterhavingchildreninawaythatfathersdon't. Whethertheidealnumberofchildrenisgreaterthanzeroisaquestionmanyresearchershavetriedtoaddress.A2014reviewofexistingresearchwhoseauthorswereskepticalofovergeneralizationsthatmostparentsaremiserableorthatmostparentsarejoyfuldiscoveredotherbroadpatternsBeingaparenttendstobealesspositiveexperienceformothersandpeoplewhoareyoungsingleorhaveyoungchildren.Andittendstobemorepositiveforfathersandpeoplewhoaremarriedorwhobecameparentslaterinlife. 1Whichofthefollowingcanbebestfilledintheblankinparagraph3? A.Thecostsofraisingchildrenarenotjustfinancial. B.Familieswithtwochildrenhavebeenpopularsincethen. C.Besidesthewaysofraisingchildrenhavechanged. D.Manyparentsalsofindraisingchildrenquitetiring. 2AccordingtoKeiNomaguchiafemalecandidatefordepartmentmanagermaydecideto. A.tohavenochild B.haveoneboyandonegirl C.devotemoretimetochildren D.sacrificehercareerforchildren 3Itcanbeinferredfromthepassagethat. A.morewomenfeeldisappointedwiththeirchildren B.coupleswithoneboyandonegirlfeelthehappiest C.fathersdon'thaveanyproblemswiththeircareers D.thehappinessofhavingchildrenvariesindividually 4Thepassagemainlytalksabout. A.theidealnumberofchildrenfamiliesprefertohave B.thereasonsbehindthechangeinpeople'sideaofraisingkids C.whatnumberofchildrenmakesparentshappiest D.differentopinionsresearchershaveofwhethertohavekids
如图F是椭圆C＝1a＞b＞0的右焦点直线ABx-2y+2＝0与椭圆C相切于点A Ⅰ若a＝求b Ⅱ若||＝||＝0求椭圆C的方程．
Therumoraboutmesoquicklythateverypersoninmycompanyknowsitinashorttime. A.develops B.transforms C.accelerates D.circulates
Whileabruteforceapproachtolearningmaygetthejobdoneit'snotnecessarilythebeststudyplan.Wedugthroughscientificresearchtoidentifyfivestudymethodsthatarerecommendedbycognitivescientists.Thesestudytipsmayimprovetheefficiencyofhowyoustudyhelpingyoutolearnmoreinlesstimeandkeepitlonger. Don'tWaitUntiltheLastMinute Parentsandteachersoftenwarnthatcrammingforexamsisn'tthebestwaytogetgoodgrades.There'ssciencetobackthisup.Researchersfoundthatfinaltestresultsimprovedwhenstudyingwasspacedoutovertime.Thisspacingeffecthasbeenrepeatedlystudiedandoneresearchexperimentfounda36%improvementingradesbecauseofspacingoutstudysessions.Byspacingoutstudysessionsthere'saneural神经的processoflearningforgettingalittlebitandre﹣learning.Thesecyclesarewhatbuildstrongermemory. UsePracticeTests Usingpracticetestswhilepreparingforexamscanhelpyouimproveyourperformance.Thislearningstrategyisn'tjustaboutbecomingfamiliarwithatestingformatit'saboutreinforcingthebrain'smemory. Rememberthatre﹣readingmaterialcanrefreshyourawarenessbutitwon'thelpyoubuildthememoryrecallskillsthatcanhelpyouknowthecorrectanswerduringyourexam.Abetterwaytostudyistouseflashcardsorsamplequizzesfromyourtextbook. DoOneThingataTime Researchshowsthatmultitaskingisn'tgoodforyourmemorysowhenyou'restudyingthat'stheonlythingyoushouldbedoing.ConsideryourbrainpowersimilartoyourInternetbandwidth.Multipledownloadsatthetimewillslowthingsdown.Similarlymultitaskingcausesanincreasedcognitiveloadforyourbrainreducingyourabilitytopayattentiontowhatyou'relearning. Infactresearchersfoundthatevenminimalmultitaskinghasaneffect.Somethingassimpleaswalkingaroundatrackwhilelearningvocabularywordscauseda17%reductionintestscores. AddVariety Whileit'sagoodideatoonlystudyforonesubjectatatimescientistsfoundthatalternatingbetweensubtopicscoulddramaticallyimprovememory. Thisprocessknownasinterleavingmeansthatyou'llcyclethroughaboutthreesubtopicslearningalittlebitmoreabouteachduringeachcycle.Onceyou'vefullystudiedthissetandhaveanunderstandingofthematerialyoucanmoveontothenextsetandrepeatthepattern. TeachaFriend It'slongbeensaidthatthebestwaytolearnsomethingistoteachittosomeoneelse.KnownastheprotégéeffectthislearningtheorydatesbacktoancientRome. Thereasonthestudytechniquehaslastedsolongisthatit'seffective.Researchersfoundthatevenexplainingclassmaterialtoyourselfcouldresultinthreetimesbettertestscoresthanthoseofotherstudentsputtingyouwellahead. Fivelearningstrategiestobe1inyourstudy Passageoutline Supportingdetails Don'twaituntilthelastminute ●Thereisscientificevidenceto2thefactthatcrammingforexamsdoesnotnecessarilybringaboutgoodgrades. ●Insteadofspacingoutstudysessionsstudentstendtopreparefortheirtestsina3. Usepracticetests ●Practicetestsarenotmerelyintendedtomakestudents4withtestingformatsbutreinforcedthebrain'smemory. ●Re﹣readingmaterialcanmakeyou5ofwhatyouhavelearntwhileflashcardsorsamplequizzescanbuildmemoryrecallskills. 6multitasking Multipletaskscanreducetheabilitytofocusonwhatisbeinglearned. Involvesubtopicsinyourstudy ●Studyingforonesubjectatatimeisrecommendedbutalternatingbetweensubtopicsleadstodramatic7inmemory. ●Interleavingisalearningprocesswherestudentslearnaboutthreesubtopicsineach8. Teachafriend ●Protégéeffectisalearningtheoryinwhichstudentscan9fromteachingsomeoneelse. ●Explainingclassmaterialtooneselfmay10.
请阅读下面文字及图片并按照要求用英语写一篇150词左右的文章. SoCloseYetSoFar WhereamI?WhatamIdoing?Ifyou'reoneofmy500friendsonlineyou'llalwaysbethefirsttoknow.MyphoneandlaptopareneveroutoftouchingdistancesoI'mconstantlypostingupdatesonsocialmedia﹣whetherI'mhavingacoffeeonmywaytoschoolwatchingTV…evenwhenI'mintheshower.Ihaveanever﹣endingflowofmessagesandupdatesfromallthepeopleIassociatewithonline. Iliveinauniversitydormwithacoupleofgreatroommates.YetthetruthofthematterisIfeellonely.AfewdaysagoIwentoutforadinnerget﹣togetherwithsomefriends.Mybestfriendleftthetablefor30minutesbecausehehadtotakeacall.Somespentthedinnerbentovertheirphonestextingfriendsonlinebutignoringtheonewhosatrightinfrontofthem.Andtheextraordinarythingisnoonethoughtthiswasrudeit'sjusthowlifeisnowadays. 【写作内容】 1.用约30个单词概述上述文字所描述的现象 2.分析造成该现象的原因两至三点 3.请你给Mark提两到三条建议. 【写作要求】 1.写作过程中不能直接引用原文语句 2.作文中不能出现真实姓名和学校名称 3.不必写标题. 【评分标准】 内容完整语言规范语篇连贯词数适当.
InAHistoryofReadingtheCanadiannovelistAlbertoMangueldescribesaremarkabletransformationofhumanconsciousnesswhichtookplacearoundthe10thcenturyA.D.thearrivalofsilentreading.Humanbeingshavebeenreadingforthousandsofyearsbutinancienttimesthenormalthingwastoreadaloud.WiththearrivalofsilentreadingManguelwrites…thereaderwasatlastabletoestablishanunrestrictedrelationshipwiththebookandthewords.Thewordsnolongerneededtooccupythetimerequiredtopronouncethem.Thereader'sthoughtsinspectedthematleisuredrawingnewideasfromthemallowingcomparisonsfrommemoryorfromotherbooks. ①Toreadsilentlyistofreeyourmindtoreflecttoremembertoquestionandcompare.ThecognitivescientistMaryanneWolfcallsthisfreedomthesecretgiftoftimetothink.Athousandyearslatercriticsfearthatdigitaltechnologyhasputthisgiftindanger.TheInternet'sfloodofinformationtogetherwiththedistractionsofsocialmediathreatenstooverwhelmthespaceofreadingleavingusinwhatthejournalistNicholasCarrhascalledtheshallows.InCarr'sviewtheendlesstemptingbuzzoftheInternetendangersourverybeingOneofthegreatestdangerswefacehewritesaswegiveupcontrolovertheflowofourthoughtsandmemoriestoapowerfulelectronicsystemisaslowdamagetoourhumannessandourhumanity. ②There'snoquestionthatdigitaltechnologypresentschallengestothereadingbrain.Butseenfromahistoricalperspectivedigitalreadingandsilentreadinglooklikedifferencesofdegreeratherthanofkind.Totheextentthatdigitalreadingrepresentssomethingnewitspotentialcutsbothways.DonebadlytheInternetreducesustomindlessclickersracingnumblytothebottomofabottomlessfeedbutdonewellithasthepotentialtoexpandtheverycontemplative沉思的spacethatwehaveprizedinourselveseversincewelearnedtoreadwithoutmovingourlips. ③InthefifthcenturyB.C.Socratesworriedthatwritingwouldweakenhumanmemoryandstifle扼杀judgment.InfactasWolfnotesinher2007bookProustandtheSquidtheStoryandScienceoftheReadingBraintheoppositehappenedFacedwiththewrittenpagethereader'sbraindevelopsnewcapacities. ④TheInternetmaycauseourmindstowanderoffandyetaquicklookatthehistoryofbookssuggeststhatwehavebeenwanderingoffallalong.Whenwereadtheeyedoesnotprogresssteadilyalongthelineoftextitalternatesbetweensaccades﹣littlejumps﹣andbriefstopsnotunlikethemovementofthemouse'scursoracrossascreenofhypertext. ⑤It'struethatstudieshavefoundthatreadersgiventextonascreendoworseonrecallandcomprehensionteststhanreadersgiventhesametextonpaper.Buta2015studybytheGermaneducatorJohannesNaumannsuggeststheopposite.Hegaveagroupofhigh﹣schoolstudentsthejoboftrackingdowncertainpiecesofinformationonwebsiteshefoundthatthestudentswhoregularlydidresearchonlinewerebetteratthistaskthanstudentswhousedtheInternetmostlytosendemailchatandblog. ⑥Anewgenerationofdigitalwriterspreferstoincludeinteractivefeatures.The2014iPadnovelPrytellsthestoryofademolition爆破expertreturninghomefromthefirstGulfWar.Thestoryistoldintextphotographsvideoclipsandaudio.Itusesaninterface界面thatallowsyoutofollowtheactionandshiftbetweenlevelsofawareness.Asyoureadtextonthescreendescribingcharactersandplotyoudrawyourfingersapartandseeaphotographofthechiefcharacterhiseyesopeningontheworld.Pinchyourfingersshutandyouvisithistroubledunconsciouswordsandimagesracebyasifyouareinsidehismemory.Pryistheoppositeofashallowworkitswholeplayisbetweenthesurfaceandthedepthsofthehumanmind.Readingitisstimulating. 1InAlbertoManguel'sopinionsilentreading. A.isanabnormalthingtohumanconsciousness B.offersreaders'mindfreedomandtimetothink C.strengthensreaders'powerofmemoryandreflection D.allowsreaderstogainaninsightintobooksandwords 2Whyisdigitaltechnologyconsideredtohaveendangeredourbeing? A.Itpresentschallengestothereadingbrain. B.Itharmsourhumannessandhumanitygradually. C.Itisverylikelytoexpandourcontemplativespace. D.Itleavesourthoughtsandmemoriesoutofcontrol. 3ThesentenceThefearoftechnologyisnotnew.shouldbeplacedin. A.① B.② C.③ D.④ 4WhatcanweinferfromJohannesNaumann'sstudy? A.It'seasiertocollectinformationontheInternetthaninbooks. B.People'shabitofusingtheInternetinfluencestheirperformance. C.TheInternetisn'tsupposedtobeusedasatoolofentertainment. D.Paperreadingisbetterthanscreenreadinginimprovingcomprehension. 5The2014iPadnovelPryismentionedinthelastparagraphto. A.introducetheoccurrenceofareadingrevolution B.showthetechnologyemployedindigitalreading C.provedigitalreadingnotshallowbutattractive D.illustratetheimpactdigitalreadinghasonourlife 6Whatisprobablythebesttitleforthepassage? A.Thedeepspaceofdigitalreading B.Thetimelyarrivalofsilentreading C.Thedevelopmentoftraditionalreading D.Thepotentialdamageofelectronicbooks
HowtoStrengthenWillpower Manypeoplebelievewithmorewillpowertheywouldalleatrightexerciseregularlyavoiddrugsandalcoholstopprocrastinating拖延andachieveallsortsofnoblegoals.Willpowerisnotanewconceptbutwestilldonothavewidespreadawarenessofit. Asitturnsoutyourwillpowerislikeamuscle.Andsimilartohowyourmusclesgettiredattheendofaworkoutthestrengthofyourwillpowerfadesasyoumakemoredecisions.Thismakessense.InaresearchstudypublishedbytheNationalAcademyofSciencespsychologistsexaminedthefactorsthatimpactwhetherornotajudgeapprovesacriminalforparole假释.Atthebeginningofthedayajudgewillgiveeachcaseafairshot.Butastheirenergystartstofade?Denydenydeny. Alargebodyofresearchhasbeendevelopedinrecentyearstoexplainmanyaspectsofwillpower.Mostoftheresearchersexploringself﹣controldosowithanobviousgoalinmindHowcanwillpowerbestrengthened? Avoidingtemptationisoneeffectivestrategyformaintainingself﹣control.InWalterMischel'smarshmallow软糖studythechildrenwhostareddirectlyatthetreatwerelesslikelytoresistitthanwerekidswhoclosedtheireyesturnedawayorotherwisedistractedthemselves.Thisprincipleappliestoadultstoo.Onerecentstudyforinstancefoundofficeworkerswhokeptcandyinadeskdraweratelessthanwhentheykeptthecandyinplainsight. Anotherhelpfultechniqueforimprovingself﹣controlisanimplementation履行intention.ForexamplesomeonewhoiswatchingtheiralcoholintakemightsaybeforeapartyIfanyoneoffersmeadrinkthenI'llaskforclubsoda.Researchamongadolescentsandadultshasfoundthatimplementationintentionsimproveself﹣controlevenamongpeoplewhosewillpowerhasbeenreducedbylaboratorytasks. Justlikeamusclethatgetstiredwithheavyusethereisanotheraspecttothemusclecomparison.Whilemusclesbecomeexhaustedbyexerciseintheshorttermtheyarestrengthenedbyregularexerciseinthelongterm.Similarlyregularlyexercisingself﹣controlmayimprovewillpowerstrength. Theevidencefromwillpower﹣depletionstudiesalsosuggeststhatmakingalistofresolutions心愿onNewYear'sEveistheworstpossibleapproach.Beingusedinoneareacanreducewillpowerinotherareassodon'ttrytoquitsmokingadoptahealthydietandstartanewexerciseplanatthesametime.Takinggoalsonebyoneisabetterapproach.Onceagoodhabitisinplaceyou'llnolongerneedtodrawonyourwillpowertomaintainthebehavior.Eventuallyhealthyhabitswillbecomeroutineandwon'trequiremakingdecisionsatall. Sonexttimeinthefaceoftemptationyoudon'thavetoworryaboutthedrainonyourwillpower.Withproperapproachesyoucantrainyourwillpowertostaystrong. A1resource ★Justlikemusclewillpowerdecreasesasyouuseitmore. Intheparoleinstancethejudgemademore2judgementsastimepassed. Waystostrengthenwillpower ★Willpowercanbemaintainedby3awayfromtemptations. Researchfoundthatofficeworkersatelesscandywhenitwasoutof4. ★Havinga5aheadoftimewillnotexhaustyourwillpowerwhenmakingdecisions. Forexampleonemaydecidebeforeapartythatifofferedadrinkaskforsoda6. ★Willpowercanbestrengthenedthroughregular7. ★Don'ttrytoaccomplishtoomanygoalsata8. AsevidenceshowsNewYearresolutionsdon'tworkbecauseyourwillpoweris9up. Good10aboutwillpower Peoplecanstrengthentheirwillpowerwiththerightapproaches.
MykidssitinGee'slivingroomandcautiouslyliftantiqueChristmasornaments饰品outofawell﹣lovedcardboardbox.Geestandsbesidethemquietly1eachtreasure.ShetellsmethatsheandTombuilttheirornament2piecebypieceduringeachyear'safter﹣Christmassale.She3asweleavewiththebox.Herprecioustreasuresgatheredoveralifetimehavefoundanew4. WefirstmetTomandGeeintheearlydaysofourmarriage.Someonehadbeen5ourgarbagecanstothegarageeachgarbagedayandJimandIhad6who.Thenonedaywe7himanelderlymanwholivedacrossthestreet. Ibakedcookiesandleftthemonastooloutsidethegaragewithathank﹣younote.Whenwegothomefromworkthatdayatypedletterhad8thegift.TheletterwasfromTomandexplainedhowhehadcometowalktheneighborhoodongarbagedayreturningcansforpeoplehe9knew.Backwhenhe'dbeenfightingawarIwasn't10toseehisyoungwifeGeehadfoundherselflivingalone.Neighborshadtakenthetimetohandlehergarbagecans11shedidn'thavetoandheneverforgot.Nowhe12itforwardbydoingthesameforallofus. Afewyearsafterwe'dmovedinTom13.Wephotocopiedthat14andattachedittooneofourownforGee.Wetoldherhow15Tomhadbeentousandhowwegrievedforher.Shewrotebackandtoldusshe16talkedtoTomeveryday.WhenGeeinvitedusovertolookthroughChristmasornamentsIrealizedhowharditmustbeto17withthatboxapieceofTom. JimandIagreeto18ourtreewithGee'sornamentsthisChristmasoutoftheboxthatis19inTom'shandwriting.MaybeI'lltalktohimjustasGeestilldoes.ThankyouI'llsayforteachinguswhatit20tobeaneighbor. 1A.confirming B.explaining C.revealing D.touching 2A.shelf B.basement C.art D.collection 3A.smiles B.weeps C.sighs D.hesitates 4A.home B.destination C.function D.chance 5A.distributing B.exposing C.returning D.attaching 6A.discovered B.wondered C.foreseen D.investigated 7A.spotted B.impressed C.acknowledged D.grasped 8A.answered B.replaced C.delivered D.rewarded 9A.especially B.thoroughly C.previously D.barely 10A.willing B.voluntary C.alive D.keen 11A.so B.before C.because D.if 12A.brought B.carried C.paid D.pushed 13A.survived B.withdrew C.retired D.died 14A.note B.gift C.letter D.treasure 15A.grateful B.close C.special D.superior 16A.still B.even C.just D.ever 17A.live B.finish C.go D.part 18A.supply B.manage C.decorate D.arm 19A.drafted B.labeled C.signed D.preserved 20A.reflects B.desires C.anticipates D.means
如图中与对应的实验像符合的是
下表除去杂质的方法正确的是
Someoftheworld'smostfamousmusiciansrecentlygatheredinParisandNewOrleanstocelebratethefirstannualInternationalJazzDay.UNESCOUnitedNationsEducationalScientificandCulturalOrganizationrecently1April30asadaytoraiseawarenessofjazzmusicitssignificanceanditspotentialasaunifying联合voice2cultures. Despitethecelebrations3intheU.S.thejazzaudiencecontinuesto4andgrowolderandthemusichasfailedtoconnectwith5generations. It'sJasonMoran'sjobtohelpchangethat.AstheKennedyCenter'sartistic6forjazzMoranhopesto7theaudienceforjazzmakethemusicmore8andpreserveitshistoryandculture. Jazzseemslikeit'snotreallyapartoftheAmerican9MorantellsNationalPublicRadio.WhatI'mhopingtoaccomplishisthatmygenerationandyoungerstartto10andunderstandthatjazzisnotblackandwhiteanymore.It'sactually11andit'sactuallydigital. Moransaysoneofthe12withjazztodayisthattheentertainmentaspectofthemusichasbeenlost.Themusiccan'tbe13todaythewayitwasin1908or1958.Ithastocontinuetomovebecausethewaytheworldworksis14saysMoran. LastyearMoranworkedonaprojectthat15FatsWaller'smusicforadancepartyjusttokindofputitbackinthemindthatWallerisdancemusic16itisconcertmusicsaysMoran.Formeit'stherecontextualization情景重构.Inmusicwheredoesthe17lie?Areweashumansgainingany18intohowwetalkaboutourselvesand19somethingasabstractasaCharlieParkerrecordgetsusintoadialogueaboutouremotionsandourthoughts?SometimeswelosesightthatthemusichasawidercontextsaysMoransoIwanttocontinuethose20. 1A.saluted B.set C.marked D.laid 2A.through B.around C.across D.outside 3A.regardless B.thus C.though D.rather 4A.expand B.boycott C.extend D.shrink 5A.younger B.smaller C.elder D.larger 6A.inventor B.adviser C.visitor D.officer 7A.widen B.strengthen C.enforce D.enrich 8A.available B.admirable C.avoidable D.accessible 9A.category B.appeal C.appetite D.recipe 10A.reconstruct B.reshape C.restore D.reconsider 11A.colorful B.meaningful C.creative D.sensitive 12A.connections B.problems C.satisfactions D.conflicts 13A.described B.revealed C.presented D.exposed 14A.transferring B.changing C.recovering D.processing 15A.managed B.arranged C.conveyed D.conducted 16A.asmuchas B.aslongas C.asfaras D.assoonas 17A.reality B.emotion C.melody D.future 18A.comprehension B.access C.appreciation D.insight 19A.why B.which C.how D.what 20A.trends B.dialogues C.messages D.contexts
We'reallusedtothelatestgenerationsofmobiletelecoms﹣sois5Gjustanotherupgrade?Farfromit﹣5Gisahugeleapforward﹣liketheshiftfromthehorseandcarttocars.Anditisn'tjustanetwork5Gwillbecomethefoundationoftheentireglobaldigitaleconomycapableofgeneratingtrillionsofpoundsofvalue. Everyoneandeveryindustrywillfeelitseffects.Comparedtotoday5Gwillbe10to20timesfasterandsupportbillionsofdigitaldeviceswithmuchgreaterreliabilityandsecurity.5GprovidestheplatformfortheInternetofThings﹣everythingfromself﹣drivingcarstoenhancedmedicalandsocialcaretoallmannerofnewindustrialandbusinessapplications.Wellestablishedonlineserviceslikemediaandentertainmentwillseesignificantimprovementssuchasultra﹣highdefinitionvideoandverylowlatency延时onlinegaming. 5Gcouplesafullfibrefixednetworkapproachwithhighcapacityhighreliabilityandlowlatencymobileplusadvancedsoftwareapproachessuchasedgecomputingandnetworkvirtualisation.Newtechniquessuchasnetworkslicingallowdifferenttypesofservicestorunatthesametimevastlyincreasingthescopeofapplicationsandservicesthatcanbesupported.Ineffectone5Gnetworkcanactasthousandsorevenbillionsofvirtualnetworkseachspecialisedforaparticulartaskordedicatedtoasinglecustomerbutallrunningononephysicalinfrastructure. Whileconsumersmaybethemostobviousbeneficiariesoffastermoreintelligentandusefulservices5Gwillalsobringenormousbenefitsandopportunitiestobusinessesbyallowingenhancementsanddifferentiatorstoexistingproductsandservicesorbyprovidingaplatformforentirelynewdigitalservices.5Gisanindustrialgame﹣changerandonethatyoucan'tignore.Withtrialsenablingtechnologyalreadyunderwayaroundtheworld5Gwillbecomeanincreasingrealitywithinthenextcoupleofyears. 5GisofsuchcriticalimportancetotheUKeconomythattheGovernmentisstronglybackingeffortstohelptheUKbecomeamarketleaderinexploitingthetechnology.IthasrecentlypublishedastrategytocreateanexcitingUK5Gworldandarrangetheactionsneededtospeeditsintroduction.Itisactivelycoordinatingeffortstoacceleratemaking5Garealityandisfundingtrialsofthetechnologyground﹣breakingapplicationsandinnovativebusinesspartnershipsacrossawiderangeofurbanandruralapplications. 1Whatcanwelearnabout5Gfromthisarticle? A.5Gwillbearegularupgradeofthelatestgenerationsofmobiletelecoms. B.5Gwillbemorereliableandsecurethantheearliergenerationsofmobiletelecoms. C.5Gwillalloweverysinglecustomertohaveonephysicalinfrastructuretorun. D.5Gwillbeontrialaroundtheworldwithinthenextcoupleofyears. 2Whatdoestheunderlinedwordbeneficiariesinparagraph4probablymean? A.Peoplewhomakecontributions. B.Peoplewhomakegains. C.Peoplewhohavecreativity. D.Peoplewhosufferlosses. 3WhatattitudedoestheUKholdtowards5G? A.Hesitant. B.Cautious. C.Concerned. D.Ambitious.
Ataskoftoppriorityforthelocalgovernmentistoappropriatemeasurestominimizetheexposureoflocalresidentstothedensesmog. A.meetupwith B.comeupwith C.getawaywith D.doawaywith
Inthelearningprocessaslongasmemoriesistiedtoaspecifictypeofsoundthesoundseemstobeabletobringbackaliveandstrengthenthelearnedinformation. A.reluctantly B.previously C.cautiously D.voluntarily
HITsongarebigbusinesssothereisamotiveforcomposerstotrytocleverlygainthoseingredientsthatmightincreasetheirchancesofsuccess.Thishoweverishard.Songsarecomplexmixturesoffeatures.Howtoanalyzethemisnotobviousandismademoredifficultstillbythefactthatwhatispopularchangesovertime.ButNataliaKomarovaamathematicianattheUniversityofCaliforniaIrvinethinksshehassolvedtheproblem.AsshewritesinRoyalSocietyOpenSciencethisweekhercomputeranalysissuggeststhatthesongscurrentlypreferredbyconsumersaredanceableparty﹣likenumbers.Unfortunatelythoseactuallywritingsongsprefersomethingelse. DrKomarovaandhercolleaguescollectedinformationonmusicreleasedinBritainbetween1985and2015.Theylookedinpublicrepositories仓库ofmusicmetadatathatareusedbymusicloversandacademics.Theycomparedwhattheyfoundintheserepositorieswithwhathadmadeitintothecharts. Metadataareinformationaboutthenatureofasongthatcangivelistenersanideaofwhatthatsongislikebeforetheyhearit.TherepositoriespresentedDrKomarovaandherteamwithmorethan500000songsthathadbeentaggedbyalgorithmswhichhadbeentrainedtodetectnumerousmusicalfeatures.Thetagsincludedadozenbinaryvariablesdarkorbrighttimbrecanorcannotbedancedtovocalorinstrumentalsungbyamanorawomanandsoon.Theteamfedallofthisinformationintoacomputerandcomparedthefeaturesofsongsthathadmadeitintothechartsroughly4%ofthoseintherepositorieswiththoseofsongsthathadnot. Overalltheteam'sresultssuggestedthatsongstaggedashappyandbrighthavebecomerarerduringthepast30yearstheoppositeshavethereforeappearedwithgreaterfrequency.Thatwasnothoweverreflectedinwhatmadeitintothecharts.Chartsuccesseswerehappierandbrighterthoughalsolessrelaxedthantheaveragesongsreleasedduringthesameyear.Charttopperswerealsomorelikelythanaveragesongstohavebeenperformedbywomen.Allthisisimportantinformationforexecutivesofmusiccompanies. DrKomarovausedtheseresultstotrainhercomputertotrytopredictwhetherarandomlypresentedsongwaslikelytohavebeenahitinagivenyear.Themachinecorrectlypredictedsuccess75%ofthetimecomparedwiththe4%ratethatguessingsuccessatrandomfromthemusicdatabasewouldyield﹣somethingelsemusicexecutivesmightpayattentionto. 1WhatcanwelearnfromParagraph1? A.DrKomarovaisfromCalifornia. B.Popularsongsdonotstaythesameastimegoesby. C.Songwritersknowexactlywhatittakestocreateahitsong. D.Consumersagreewithsongwritersabouttrendingmusic. 2Whichofthefollowingistrueaboutthemetadata? A.Ithelpsmusicianstocreatehitsongs. B.Peoplelistentomusiconit. C.ItwascreatedbyDrKomarovaandhercolleagues. D.Ithelpscollectandanalyzeinformationaboutmusic. 3Accordingtothepassagewhichofthefollowingistrueabouttop﹣chartsongs? A.Theyareusuallymorerelaxingthanothersongs. B.Danceableandparty﹣likemusicprobablymakesittothetop. C.Theyaremuchmorelikelytobesungbymen. D.Theyareusuallyhappierandbrighterthanothers. 4Thepassageindicatesthat. A.MusiciansalreadybenefitfromtheresultofDrKomarova'sresearch B.4%ofthesongsaretotallyrandompicksinDrKomarova'sresearch. C.ThesecretofhitsongshasnowbeenfoundaccordingtoDrKomarova D.HitsongsarepartlypredictablebythemachineinventedbyDrKomarova
Theworld'sfirstelectricdriverlessheavytruckissaidtobethantraditionalones. A.tentimesmoresafer B.morethantentimessafer C.morethantentimesassafe D.tenmoretimesassafe
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