版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
SectionIUseofEnglishDirections:Readthefollowingtext。Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET。(10points)
Happypeopleworkdifferently。They’remoreproductive,morecreative,andwillingtotakegreaterrisks。Andnewresearchsuggeststhathappinessmightinfluence1firmswork,too。
Companieslocatedinplacewithhappierpeopleinvestmore,accordingtoarecentresearchpaper。2,firmsinhappyplacesspendmoreonR&D(researchanddevelopment)。That’sbecausehappinessislinkedtothekindoflonger-termthinking3formakinginvestmentforthefuture。
Theresearcherswantedtoknowifthe
4
andinclinationforrisk-takingthatcomewithhappinesswould
5
thewaycompaniesinvested。SotheycomparedU.S。cities’averagehappiness
6
byGalluppollingwiththeinvestmentactivityofpubliclytradedfirmsinthoseareas。7
enough,firms’investmentandR&Dintensitywerecorrelatedwiththehappinessoftheareainwhichtheywere8。Butitisreallyhappinessthat’slinkedtoinvestment,orcouldsomethingelseabouthappiercities
9whyfirmstherespendmoreonR&D?Tofindout,theresearchescontrolledforvarious10
thatmightmakefirmsmorelikelytoinvestlikesize,industry,andsales-and-andforindicatorsthataplacewas11
tolivein,likegrowthinwagesorpopulation。Theylinkbetweenhappinessandinvestmentgenerally12evenafteraccountingforthesethings。Thecorrelationbetweenhappinessandinvestmentwasparticularlystrongforyoungerfirms,whichtheauthors13to“lessconfineddecisionmakingprocess”andthepossiblepresenceofyoungerandless14managerswhoaremorelikelytobeinfluencedbysentiment。’’Therelationshipwas15strongerinplaceswherehappinesswasspreadmore16。Firmsseemtoinvestmoreinplaces。
17thisdoesn’tprovethathappinesscausesfirmstoinvestmoreortotakealonger-termview,theauthorsbelieveitatleast18atthatpossibility。It’snothardtoimaginethatlocalcultureandsentimentwouldhelp19howexecutivesthinkaboutthefuture。Itsurelyseemsplausiblethathappypeoplewouldbemoreforward–thinkingandcreativeand20R&Dmorethantheaverage,”saidoneresearcher。
1。[A]why[B]where[C]how[D]when2。[A]Inreturn
[B]Inparticular
[C]Incontrast
[D]Inconclusion3。[A]sufficient[B]famous[C]perfect[D]necessary4。[A]individualism[B]modernism[C]optimism[D]realism5。[A]echo[B]miss[C]spoil[D]change6。[A]imagined[B]measured[C]invented[D]assumed7。[A]sure[B]odd[C]unfortunate[D]often8。[A]advertised[B]divided[C]overtaxed[D]headquartered9。[A]explain[B]overstate[C]summarize[D]emphasize10。[A]stages[B]factors[C]levels[D]methods
11。[A]desirable
[B]sociable
[C]reputable
[D]reliable12。[A]resumed[B]held[C]emerged[D]broke13。[A]attribute
[B]assign
[C]transfer
[D]compare14。[A]serious[B]civilized[C]ambitious[D]experienced15。[A]thus[B]instead[C]also[D]never16。[A]rapidly[B]regularly[C]directly[D]equally17。[A]After[B]Until[C]While[D]Since18。[A]arrives
[B]jumps
[C]hints
[D]strikes19。[A]shape[B]rediscover[C]simplify[D]share20。[A]prayfor[B]leantowards[C]giveaway[D]sendactSectionIIReadingComprehensionPartADirections:Readthefollowingfourtexts。AnswerthequestionsbeloweachtextbychoosingA,B,CorD。MarkyouranswersontheANSWERSHEET。(40points)
Text1It’struethathigh-schoolcodingclassesaren’tessentialforlearningcomputerscienceincollege。Studentswithoutexperiencecancatchupafterafewintroductorycourses,saidTomCortina,theassistantdeanatCarnegieMellon’sSchoolofComputerScience。However,Cortinasaid,earlyexposureisbeneficial。Whenyoungerkidslearncomputerscience,theylearnthatit’snotjustaconfusing,endlessstringoflettersandnumbers–butatooltobuildapps,orcreateartwork,ortesthypotheses。It’snotashardforthemtotransformtheirthoughtprocessesasitisforolderstudents。Breakingdownproblemsintobite-sizedchunksandusingcodetosolvethembecomesnormal。Givingmorechildrenthistrainingcouldincreasethenumberofpeopleinterestedinthefieldandhelpfillthejobsgap,Cortinasaid。Studentsalsobenefitfromlearningsomethingaboutcodingbeforetheygettocollege,whereintroductorycomputer-scienceclassesarepackedtothebrim,whichcandrivetheless-experiencedor-determinedstudentsaway。TheFlatironSchool,wherepeoplepaytolearnprogramming,startedasoneofthemanycodingbootcampsthat’sbecomepopularforadultslookingforacareerchange。Thehigh-schoolersgetthesamecurriculum,but“wetrytogearlessonstowardthingsthey’reinterestedin,”saidVictoriaFriedman,aninstructor。Forinstance,oneoftheappsthestudentsaredevelopingsuggestsmoviesbasedonyourmood。
ThestudentsintheFlatironclassprobablywon’tdropoutofhighschoolandbuildthenextFacebook。Programminglanguageshaveaquickturnover,sothe“RubyonRails”languagetheylearnedmaynotevenberelevantbythetimetheyenterthejobmarket。Buttheskillstheylearn–howtothinklogicallythroughaproblemandorganizetheresults–applytoanycodinglanguage,saidDeborahSeehorn,aneducationconsultantforthestateofNorthCarolina。
Indeed,theFlatironstudentsmightnotgointoITatall。Butcreatingafuturearmyofcodersisnotthesolepurposeoftheclasses。Thesekidsaregoingtobesurroundedbycomputers-intheirpockets,intheiroffices,intheirhomes–fortherestoftheirlives,Theyoungertheylearnhowcomputersthink,howtocoaxthemachineintoproducingwhattheywant–theearliertheylearnthattheyhavethepowertodothat–thebetter。
21.Cortinaholdsthatearlyexposuretocomputersciencemakesiteasierto_______A。completefuturejobtrainingB。remodelthewayofthinkingC。formulatelogicalhypothesesD。perfectartworkproduction22.Indeliveringlessonsforhigh-schoolers,Flatironhasconsideredtheir________A。experienceB。interestC。careerprospectsD。academicbackgrounds
23.DeborahSeehornbelievesthattheskillslearnedatFlatironwill________A。helpstudentslearnothercomputerlanguagesB。havetobeupgradedwhennewtechnologiescomeC。needimprovingwhenstudentslookforjobsD。enablestudentstomakebigquickmoney24.Accordingtothelastparagraph,Flatironstudentsareexpectedto______A。bringforthinnovativecomputertechnologiesB。staylongerintheinformationtechnologyindustryC。becomebetterpreparedforthedigitalizedworldD。competewithafuturearmyofprogrammers25.Theword“coax”(Line4,Para.6)isclosestinmeaningto________A。persuadeB。frightenC。misguideD。challenge
Text2Biologistsestimatethatasmanyas2millionlesserprairiechickens---akindofbirdlivingonstretchinggrasslands—oncelentredtotheoftengreylandscapeofthemidwesternandsouthwesternUnitedStates。Butjustsome22,000birdsremaintoday,occupyingabout16%ofthespecies‘historicrange。ThecrashwasamajorreasontheU.S。FishandWildlifeService(USFWS)decidedtoformallylistthebirdasthreatened。“Thelesserprairiechickenisinadesperatesituation,”saidUSFWSDirectorDanielAshe。Someenvironmentalists,however,weredisappointed。Theyhadpushedtheagencytodesignatethebirdas“endangered,”astatusthatgivesfederalofficialsgreaterregulatorypowertocrackdownonthreats。ButAsheandothersarguedthatthe”threatened”taggavethefederalgovernmentflexibilitytotryoutnew,potentiallylessconfrontationalconservationsapproaches。Inparticular,theycalledforforgingclosercollaborationswithwesternstategovernments,whichareoftenuneasywithfederalaction。andwiththeprivatelandownerswhocontrolanestimated95%oftheprairiechicken‘shabitat。
Undertheplan,forexample,theagencysaiditwouldnotprosecutelandownerorbusinessesthatunintentionallykill,harm,ordisturbthebird,aslongastheyhadsignedarange—widemanagementplantorestoreprairiechickenhabitat。NegotiatedbyUSFWSandthestates,theplanrequiresindividualsandbusinessesthatdamagehabitataspartoftheiroperationstopayintoafundtoreplaceeveryacredestroyedwith2newacresofsuitablehabitat。Thefundwillalsobeusedtocompensatelandownerswhosetasidehabitat,USFWSalsosetaninterimgoalofrestoringprairiechickenpopulationstoanannualaverageof67,000birdsoverthenext10years。AnditgivestheWesternAssociationofFishandWildlifeAgencies(WAFWA),acoalitionofstateagencies,thejobofmonitoringprogress。Overall,theideaistolet“states”remaininthedriver‘sseatformanagingthespecies,”Ashesaid。
Noteveryonebuysthewin-winrhetoric。SomeCongressmembersaretryingtoblocktheplan,andatleastadozenindustrygroups,fourstates,andthreeenvironmentalgroupsarechallengingitinfederalcourt。Notsurprisingly,doesn’tgofarenough。“Thefederalgovernmentisgivingresponsibilityformanagingthebirdtothesameindustriesthatarepushingittoextinction,”saysbiologistJayLininger。
26.Themajorreasonforlistingthelesserprairieasthreatenedis____。[A]itsdrasticallydecreasedpopulation[B]theunderestimateofthegrasslandacreage[C]adesperateappealfromsomebiologists[D]theinsistenceofprivatelandowners27.The“threatened”tagdisappointedsomeenvironmentalistsinthatit_____。[A]wasagive-intogovernmentalpressure[B]wouldinvolvefeweragenciesinaction[C]grantedlessfederalregulatorypower[D]wentagainstconservationpolicies
28.ItcanbelearnedfromParagraph3thatunintentionalharm-doerswillnotbeprosecutedifthey_____。[A]agreetopayasumforcompensation[B]volunteertosetupanequallybighabitat[C]offertosupporttheWAFWAmonitoringjob[D]promisetoraisefundsforUSFWSoperations29.AccordingtoAshe,theleadingroleinmanagingthespeciesin______。[A]thefederalgovernment[B]thewildlifeagencies[C]thelandowners[D]thestates30.JayLiningerwouldmostlikelysupport_______。[A]industrygroups[B]thewin-winrhetoric[C]environmentalgroups[D]theplanunderchallengeText3Thateveryone‘stoobusythesedaysisacliché。Butonespecificcomplaintismadeespeciallymournfully:There’sneveranytimetoread。
Whatmakestheproblemthornieristhattheusualtime-managementtechniquesdon‘tseemsufficient。Theweb’sfullofarticlesofferingtipsonmakingtimetoread:“GiveupTV”or“Carryabookwithyouatalltimes。”Butinmyexperience,usingsuchmethodstofreeuptheodd30minutesdoesn‘twork。Sitdowntoreadandtheflywheelofwork-relatedthoughtskeepsspinning-orelseyou’resoexhaustedthatachallengingbook‘sthelastthingyouneed。Themodernmind,TimParks,anovelistandcritic,writes,“isoverwhelminglyinclinedtowardcommunication…Itisnotsimplythatoneisinterrupted;itisthatoneisactuallyinclinedtointerruption。”Deepreadingrequiresnotjusttime,butaspecialkindoftimewhichcan’tbeobtainedmerelybybecomingmoreefficient。
Infact,“becomingmoreefficient”ispartoftheproblem。Thinkingoftimeasaresourcetobemaximisedmeansyouapproachitinstrumentally,judginganygivenmomentaswellspentonlyinsofarasitadvancesprogresstowardsomegoal。Immersivereading,bycontrast,dependsonbeingwillingtoriskinefficiency,goallessness,eventime-wasting。Trytoslotitasato-dolistitemandyou‘llmanageonlygoal-focusedreading-useful,sometimes,butnotthemostfulfillingkind。“Thefuturecomesatuslikeemptybottlesalonganunstoppableandnearlyinfiniteconveyorbelt,”writesGaryEberleinhisbookSacredTime,and“wefeelapressuretofillthesedifferent-sizedbottles(days,hours,minutes)astheypass,foriftheygetbywithoutbeingfilled,wewillhavewastedthem。”Nomind-setcouldbeworseforlosingyourselfinabook。
Sowhatdoeswork?Perhapssurprisingly,schedulingregulartimesforreading。You‘dthinkthismightfueltheefficiencymind-set,butinfact,Eberlenotes,suchritualisticbehaviourhelpsus“stepoutsidetime’sflow”into“soultime。”Youcouldlimitdistractionsbyreadingonlyphysicalbooks,oronsingle-purposee-readers。“Carryabookwithyouatalltimes”canactuallywork,too-providingyoudipinoftenenough,sothatreadingbecomesthedefaultstatefromwhichyoutemporarilysurfacetotakecareofbusiness,beforedroppingbackdown。Onareallygoodday,itnolongerfeelsasifyou‘re“makingtimetoread,”butjustreading,andmakingtimeforeverythingelse。
31。Theusualtime-managementtechniquesdon’tworkbecause。[A]whattheycanofferdoesnoteasethemodernmind[B]whatchallengingbooksdemandisrepetitivereading[C]whatpeopleoftenforgetiscarryingabookwiththem[D]whatdeepreadingrequirescannotbeguaranteed32。The“emptybottles”metaphorillustratesthatpeoplefeelapressureto
。[A]updatetheirto-dolists[B]makepassingtimefulfilling[C]carrytheirplansthrough[D]pursuecarefreereading
33。Eberlewouldagreethatschedulingregulartimesforreadinghelps。[A]encouragetheefficiencymind-set[B]developonlinereadinghabits[C]promoteritualisticreading[D]achieveimmersivereading34。“Carryabookwithyouatalltimes”canworkif。[A]readingbecomesyourprimarybusinessoftheday[B]allthedailybusinesshasbeenpromptlydealtwith[C]youareabletodropbacktobusinessafterreading[D]timecanbeevenlysplitforreadingandbusiness35。Thebesttitleforthistextcouldbe。[A]HowtoEnjoyEasyReading[B]HowtoFindTimetoRead[C]HowtoSetReadingGoals[D]HowtoReadExtensively
Text4Againstabackdropofdrasticchangesineconomyandpopulationstructure,youngerAmericansaredrawinganew21st-centuryroadmaptosuccess,alatestpollhasfound。Acrossgenerationallines,Americanscontinuetoprizemanyofthesametraditionalmilestonesofasuccessfullife,includinggettingmarried,havingchildren,owningahome,andretiringintheirsixties。Butwhileyoungandoldmostlyagreeonwhatconstitutesthefinishlineofafulfillinglife,theyofferstrikinglydifferentpathsforreachingit。
Youngpeoplewhoarestillgettingstartedinlifeweremorelikelythanolderadultstoprioritizepersonalfulfillmentintheirwork,tobelievetheywilladvancetheircareersmostbyregularlychangingjobs,tofavorcommunitieswithmorepublicservicesandafasterpaceoflife,toagreethatcouplesshouldbefinanciallysecurebeforegettingmarriedorhavingchildren,andtomaintainthatchildrenarebestservedbytwoparentsworkingoutsidethehome,thesurveyfound。
Fromcareertocommunityandfamily,thesecontrastssuggestthatintheaftermathofthesearingGreatRecession,thosejuststartingoutinlifearedefiningprioritiesandexpectationsthatwillincreasinglyspreadthroughvirtuallyallaspectsofAmericanlife,fromconsumerpreferencestohousingpatternstopolitics。
Youngandoldconvergeononekeypoint:Overwhelmingmajoritiesofbothgroupssaidtheybelieveitisharderforyoungpeopletodaytogetstartedinlifethanitwasforearliergenerations。Whlieyoungerpeoplearesomewhatmoreoptimisticthantheireldersabouttheprospectsforthosestartingouttoday,bigmajoritiesinbothgroupsbelievethose“justgettingstartedinlife”faceatougheragood-payingjob,startingafamily,managingdebt,andfindingaffordablehousing。
PeteSchneiderconsiderstheclimbtoughertoday。Schneider,a27-yaear-oldautotechnicianfromtheChicagosuburbssayshestruggledtofindajobaftergraduatingfromcollege。Evennowthatheisworkingsteadily,hesaid。”Ican’taffordtopaymamonthlymortgagepaymentsonmyown,soIhavetorentroomsouttopeopletomarkthathappen。”Lookingback,heisstruckthathisparentscouldprovideacomfortablelifefortheir
childreneventhoughneitherhadcompletedcollegewhenhewasyoung。“Istillgrewupinanuppermiddle-classhomewithparentswhodidn’thavecollegedegrees,”Schneidersaid。“Idon’tthinkpeoplearecapableofthatanymore。”
36。Onecross-generationmarkofasuccessfullifeis。[A]tryingoutdifferentlifestyles[B]havingafamilywithchildren[C]workingbeyondretirementage[D]settingupaprofitablebusiness37。ItcanbelearnedfromParagraph3thatyoungpeopletendto。[A]favoraslowerlifepace[B]holdanoccupationlonger[C]attachimportancetopre-maritalfinance[D]giveprioritytochildcareoutsidethehome
38。Theprioritiesandexpectationsdefinedbytheyoungwill。[A]becomeincreasinglyclear[B]focusonmaterialisticissues[C]dependlargelyonpoliticalpreferences[D]reachalmostallaspectsofAmericanlife39。Bothyoungandoldagreethat。[A]good-payingjobsarelessavailable[B]theoldmademorelifeachievements[C]housingloanstodayareeasytoobtain[D]gettingestablishedisharderfortheyoung40。WhichofthefollowingistrueaboutSchneider?[A]Hefoundadreamjobaftergraduatingfromcollege[B]Hisparentsbelieveworkingsteadilyisamustforsuccess[C]Hisparents’goodlifehaslittletodowithacollegedegree[D]HethinkshisjobasatechnicianquitechallengingPartBDirections:ReadthefollowingtextandanswerthequestionsbychoosingthemostsuitablesubheadingfromthelistA-Gforeachnumberedparagraphs(41-45)。Therearetwoextrasubheadingswhichyoudonotneedtouse。MarkyouranswersontheANSWERSHEET。(10points)A。BesillyB。HavefunC。AskforhelpD。Expressyouremotions。E。Don’toverthinkitF。BeeasilypleasedG。Noticethings
ActYourShoeSize,NotYourAge。(1)Asadults,itseemsthatwe’reconstantlypursuinghappiness,oftenwithmixedresults。Yetchildrenappeartohaveitdowntoanart-andforthemostparttheydon’tneedself-helpbooksortherapy。Instead,theylookaftertheirwellbeinginstinctivelyandusuallymoreeffectivelythanwedoasgrownups。Perhapsit’stimetolearnafewlessonsfromthem。
41___________。(2)Whatdoesachilddowhenhe’ssad?Hecries。Whenhe’sangry?Heshouts。Scared?Probablyabitofboth。Aswegrowup,welearntocontrolouremotionssotheyaremanageableanddon’tdictateourbehaviours,whichisinmanywaysagoodthing。Buttoooftenwetakethisprocesstoofarandendupsuppressingemotions,especiallynegativeones。That’saboutaseffectiveasbrushingdirtunderacarpetandcanevenmakeusill。Whatwefeelappropriatelyandthen-again,likechildren-moveon。
42__________。AcoupleofChristmasesago,myyoungeststepdaughter,whowas9yearsoldatthetime,gotaSupermanT-shirtforChristmas。Itcostlessthanafiverbutshewasoverjoyed,andcouldn’tbiggerhouseorbettercarwillbethemagicsilverbulletthatwillallowustofinallybecontent,buttherealityisthesethingshavelittlelastingimpactonourhappinesslevels。Instead,beinggratefulforsmallthingseverydayisamuchbetterwaytoimprovewellbeing。
43__________。Haveyouevernoticedhowmuchchildrenlaugh?Ifweadultscouldindulgeinabitofsillinessandgiggling,wewouldreducethestresshormonesinourbodies,increasegoodhormoneslikeendorphins,improvebloodflowtoourheartsandeverhaveagreaterchanceoffightingoffinfection。Allofwhichwould,ofcourse,haveapositiveeffectonourhappinesslevels。
44__________。Theproblemwithbeingagrownupisthatthere’sanawfullotofseriousstufftodealwith-work,mortgagepayments,figuringoutwhattocookfordinner。Butasadultswealsohavetheluxuryofbeingabletocontrolourowndiariesandit’simportantthatwescheduleintimetoenjoythethingwelove。Thosethingsmightbesocial,sporting,creativeorcompletelyrandom(dancingaroundthelivingroom,anyone?)-itdoesn’tmatter,solongasthey’reenjoyable,andnotlikelytohavenegativesideeffects,suchasdrinkingtoomuchalcoholorgoingonawildspendingspreeifyou’reonatightbudget。
45__________。Havingsaidalloftheabove,it’simportanttoaddthatweshouldn’ttrytoohardtobehappy。Scientiststellusthiscanbackfireandactuallyhaveanegativeimpactonourwellbeing。AstheChinesephilosopherChuangTzuisreportedtohavesaid:“Happinessistheabsenceofstrivingforhappiness。”Andinthat,oncemore,weneedtolooktotheexampleofourchildren,towhomhappinessisnotagoalbutanaturalbyproductofthewaytheylive。SectionIII
Translation
Directions:TranslatethefollowingtextintoChinese。WriteyourtranslationontheANSWERSHEET。(15points)Thesupermarketisdesignedtolurecustomersintospendingasmuchtimeaspossiblewithinitsdoors。Thereasonforthisissimple:Thelongeryoustayinthestore,themorestuffyou’llsee,andthemorestuffyousee,themoreyou’llbuy。Andsupermarketscontainalotofstuff。Theaveragesupermarket,accordingtotheFoodMarketingInstitute,carriessome44,000differentitems,andmanycarrytensofthousandsmore。Thesheervolumeofavailablechoiceisenoughtosendshoppersintoastateofinformationoverload。Accordingtobrain-scanexperiments,thedemandsofsomuchdecision-makingquicklybecometoomuchforus。Afterabout40minutesofshopping,mostpeoplestopstrugglingtoberationallyselective,andinsteadbeganshoppingemotionally—whichisthepointatwhichweaccumulatethe50percentofstuff
inourcartthatweneverintendedbuying。
SectionIVWritingPartA47。
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 建筑学咨询行业市场调研分析报告
- 充电桩智能管理行业营销策略方案
- 公司治理法律服务行业经营分析报告
- 印刷机用盘纸产业链招商引资的调研报告
- 女式披肩产品供应链分析
- 安排举办和组织专家讨论会行业相关项目经营管理报告
- 室内用空气芳香剂产业链招商引资的调研报告
- 木片切削机产品供应链分析
- 宽顶无沿圆帽产业链招商引资的调研报告
- 工业用封口机产品供应链分析
- (鲁科版)五年级英语上册知识要点总复习
- 小学心理健康课教学设计《跳出思维定势》
- 网点经营技巧课件1
- 性健康教育课件
- 影响世界的工业革命 2023届高三统编版历史一轮复习
- 职业学院教师教学创新团队建设管理办法
- 微型计算机原理与应用习题集及答案
- 河北省唐山市药品零售药店企业药房名单目录
- 喵喵老师制作 电子百拼的黑白电路图
- DB34-T 4010-2021 水利工程外观质量评定规程-高清现行
- 《整改报告》模板
评论
0/150
提交评论