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用数字和化学符号填空： （1）3个硫原子 ， （2）4个水分子 ， （3）三氧化二铁 （4）正3价的铝元素 ； （5）钙离子 ．
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用化学符号填空1个硫原子2个氮分子3个钾原子___________2带2个单位正电荷的镁离子____
用适当的数字和化学符号填空1镁离子_________22个铁原子_________3水分子_____
用数字化学符号填空12个氦原子__________23个氢气分子_________3n个亚铁离子__
用数字和化学符号填空12个氮分子_22个氢原子3地壳中含量最多的金属元素4硫原子的结构示意图则x的值
用化学符号填空1个硫原子2个氮分子我发现若化学符号前面的化学计量数大于1则该符号只能表示填宏观或微观
用元素符号或化学式填空13个硫原子________2硝酸________38个水分子________
用元素符号或化学式填空13个硫原子2硝酸32个氧分子43个铵根离子.
用数字和化学符号或单独的化学符号填空13个氮分子25个亚铁离子3硫酸铝中铝元素为正三价_______
用数字和化学符号表示下列意义或者数字和化学符号所表示的意义是什么①2个硫原子②3个水分子③2O④3C
用数字和化学符号表示4分11个铁原子22个铝离子33个硫离子44个氩原子
用正确的数字和符号填空12个氯原子____2保持氧气化学性质的微粒______
用化学符号填空1钠离子2铁元素3硫元素4四个磷原子.
用元素符号或化学式填空13个硫原子_____________28个水分子___________
用数字和化学符号填空⑴钙元素⑵1个硫酸根离子⑶2个氢分子⑷2个氧原子
用数字和化学符号填空⑴4个氯原子⑵2个镁离子⑶3个水分子⑷-2价的硫元素⑸碳酸钠
化学用语是学好化学的基础请你用化学符号或数字填空1钠元素一个钠原子2二个氧原子
用数字和化学符号填空①3个水分子②2个硫原子③正3价的铝元素④钙离子
用数字和化学符号填空12个氮分子_____22个氢原子3地壳中含量最多的金属元素4硫原子的结构示意图
请按要求用化学符号填空1三个硫原子2氦气3锌离子.
用数字和化学符号表示1硫元素___________22个氢原子___________3过氧化氢4液氧
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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
Moreregulationsshouldbeintroducedtostandardizetheoperationofbike﹣sharingcompanieswhosedelaysinreturningareunderattackbyconsumers. A.expenses B.revenues C.budgets D.deposits
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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
如图FA⊥平面ABC∠ABC＝90°EC∥FAFA＝3EC＝1AB＝2AC＝4BD⊥AC交AC于点D． Ⅰ证明FD⊥BE Ⅱ求直线BC与平面BEF所成角的正弦值．
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
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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