2022年6月大學(xué)英語四級考試真題及答案（第3套）聽力部分短篇新聞（共3篇，每題1分，共7分）新聞一Anewstudyhasfoundthatmanyoftheworld'stopathletesuseaspecialkindoftrainingcalledaltitudetraining.Altitudetraininginvolvestrainingathighaltitudes,wheretheairisthinnerandthereislessoxygen.Athleteswhotrainathighaltitudescanincreasetheirredbloodcellcount,whichallowsthemtocarrymoreoxygentotheirmuscles.Thiscanimprovetheirenduranceandperformance.Thestudylookedatthetraininghabitsof100topathletesfromavarietyofsports,includingrunning,cycling,andswimming.Itfoundthat80%oftheseathleteshadusedaltitudetrainingatsomepointintheircareers.Thestudyalsofoundthatathleteswhousedaltitudetrainingweremorelikelytowinmedalsatinternationalcompetitions.1.Whatisaltitudetraining?A.Trainingatlowaltitudes.B.Trainingathighaltitudes.C.Trainingwithmoreoxygen.D.Trainingwithlessredbloodcells.答案：B分析：文中明確提到“Altitudetraininginvolvestrainingathighaltitudes”，所以選B。2.Whatcanaltitudetraininghelpathletesdo?A.Decreasetheirredbloodcellcount.B.Carrylessoxygentotheirmuscles.C.Improvetheirenduranceandperformance.D.Losemoreweight.答案：C分析：根據(jù)“Athleteswhotrainathighaltitudescanincreasetheirredbloodcellcount...Thiscanimprovetheirenduranceandperformance”可知選C。3.Whatpercentageofthetopathletesinthestudyhadusedaltitudetraining?A.20%.B.50%.C.80%.D.100%.答案：C分析：文中提到“Thestudyfoundthat80%oftheseathleteshadusedaltitudetrainingatsomepointintheircareers”，所以選C。新聞二Amajorfirebrokeoutinalargeshoppingmallinthecitycenterlastnight.Thefirestartedonthethirdfloorofthemall,whichishometoanumberofclothingstoresandrestaurants.Firefighterswerecalledtothesceneataround9:30p.m.andspentseveralhourstryingtoputouttheblaze.Bytheearlyhoursofthismorning,thefirehadbeenbroughtundercontrol,butnotbeforecausingextensivedamagetothemall.Manyofthestoresonthethirdfloorwerecompletelydestroyed,andtherewerealsoreportsofdamagetothefloorsaboveandbelow.Nocasualtieshavebeenreported,butseveralpeopleweretreatedforsmokeinhalation.Thecauseofthefireisstillunknown,andaninvestigationisunderway.4.Whendidthefirestart?A.Around9:30a.m.B.Around9:30p.m.C.Around10:30p.m.D.Around11:30p.m.答案：B分析：文中提到“Firefighterswerecalledtothesceneataround9:30p.m.”，說明火災(zāi)大概在晚上9:30發(fā)生，選B。5.Wheredidthefirestart?A.Onthefirstfloor.B.Onthesecondfloor.C.Onthethirdfloor.D.Onthefourthfloor.答案：C分析：根據(jù)“Thefirestartedonthethirdfloorofthemall”可知選C。6.Whatwastheresultofthefire?A.Nodamagetothemall.B.Somedamagetothefirst-floorstores.C.Extensivedamagetothemall.D.Onlydamagetotherestaurants.答案：C分析：文中說“Bytheearlyhoursofthismorning,thefirehadbeenbroughtundercontrol,butnotbeforecausingextensivedamagetothemall”，所以選C。7.Whyweresomepeopletreated?A.Forburns.B.Forbrokenbones.C.Forsmokeinhalation.D.Forheartproblems.答案：C分析：文中提到“Severalpeopleweretreatedforsmokeinhalation”，選C。長對話（共2篇，每題1分，共8分）對話一M:Hi,Lily.Iheardyouwenttoajobfairlastweek.Howwasit?W:Well,itwasquitecrowded.Thereweresomanycompaniesthere.Ihandedoutmyresumetoafewofthem.M:Whichcompaniesdidyouapplyto?W:Iappliedtoasoftwaredevelopmentcompany,amarketingfirm,andabank.M:That'sawiderange.Whythebank?Ithoughtyouwereinterestedinsoftwaredevelopment.W:Iam,butIalsowanttohavemoreoptions.Thebankjobseemstohaveagoodsalaryandbenefits.M:Isee.Haveyouheardbackfromanyofthem?W:Notyet.Theysaidtheywouldcontactmewithintwoweeks.I'mabitnervous.M:Don'tbe.Youhaveagoodeducationalbackgroundandsomerelevantinternshipexperience.You'llprobablygetanoffer.8.Whatdidthewomandoatthejobfair?A.Sheinterviewedwithseveralcompanies.B.Shehandedoutherresumetosomecompanies.C.Sheonlylookedaroundthejobfair.D.Shegaveaspeechatthejobfair.答案：B分析：對話中女士說“Ihandedoutmyresumetoafewofthem”，所以選B。9.Whichtypeofcompanydidthewomannotapplyto?A.Asoftwaredevelopmentcompany.B.Amanufacturingcompany.C.Amarketingfirm.D.Abank.答案：B分析：女士提到申請了軟件公司、營銷公司和銀行，未提及制造公司，選B。10.Whydidthewomanapplytothebank?A.Becauseshelovesbanking.B.Becauseithasagoodsalaryandbenefits.C.Becauseherfriendworksthere.D.Becauseit'sclosetoherhome.答案：B分析：女士說“Thebankjobseemstohaveagoodsalaryandbenefits”，所以選B。11.Howdoesthewomanfeelnow?A.Excited.B.Confident.C.Nervous.D.Relaxed.答案：C分析：女士說“I'mabitnervous”，選C。對話二W:Hey,Tom.I'mplanningaweekendtrip.Doyouhaveanysuggestions?M:Well,ifyoulikenature,youcouldgotothemountains.Therearesomereallybeautifulhikingtrailsthere.W:Thatsoundsgood,butIdon'twanttodotoomuchphysicalactivity.M:Thenhowaboutabeach?Youcanjustlieonthesand,soakupthesun,andreadabook.W:Iliketheidea,butit'sabitfar.Idon'twanttospendtoomuchtimeontheroad.M:Hmm.Whataboutasmalltownnearby?Therearesomehistoricalbuildingsandnicecafes.Youcantakealeisurelywalkaround.W:Thatsoundsperfect.Doyouknowofanyspecifictown?M:Yeah,there'satowncalledRiverdale.It'sonlyaboutanhour'sdrivefromhere.12.Whatdidthemanfirstsuggestforthewoman'sweekendtrip?A.Abeach.B.Asmalltown.C.Themountains.D.Abigcity.答案：C分析：男士先說“ifyoulikenature,youcouldgotothemountains”，選C。13.Whydidthewomanrejectthebeachsuggestion?A.Shedoesn'tlikethebeach.B.It'stoofar.C.There'snogoodaccommodation.D.It'stoocrowded.答案：B分析：女士說“it'sabitfar.Idon'twanttospendtoomuchtimeontheroad”，選B。14.Whatdidthemanfinallysuggest?A.AsmalltowncalledRiverdale.B.Anotherbeachcloser.C.Adifferentmountainarea.D.Athemepark.答案：A分析：男士最后說“There'satowncalledRiverdale”，選A。15.HowfarisRiverdalefromhere?A.Abouthalfanhour'sdrive.B.Aboutanhour'sdrive.C.Abouttwohours'drive.D.Aboutthreehours'drive.答案：B分析：男士提到“it'sonlyaboutanhour'sdrivefromhere”，選B。聽力篇章（共3篇，每題1分，共10分）篇章一Manypeoplebelievethatreadingisasolitaryactivity,butitdoesn'thavetobe.Bookclubsareagreatwaytoshareyourloveofreadingwithothers.Inabookclub,membersusuallymeetregularlytodiscussaparticularbook.Thesediscussionscanbeveryinteresting.Yougettoheardifferentperspectivesonthebook,whichcandeepenyourunderstandingofit.Bookclubsalsoprovideanopportunitytomakenewfriends.Youcanmeetpeoplewithsimilarinterestsandhaveengagingconversations.Somebookclubsevenorganizespecialevents,suchasauthorvisitsorbook-relatedoutings.Thiscanaddanextralayeroffuntothereadingexperience.Whetheryou'reacasualreaderoraseriousbookworm,joiningabookclubcanenhanceyourloveforreading.16.Whatdopeopleusuallythinkaboutreading?A.It'sasocialactivity.B.It'sasolitaryactivity.C.It'saboringactivity.D.It'sadifficultactivity.答案：B分析：文中提到“Manypeoplebelievethatreadingisasolitaryactivity”，選B。17.Whathappensinabookclub?A.Membersonlyreadbookssilently.B.Membersmeettodiscussaparticularbook.C.Memberswritetheirownbooks.D.Memberscompeteinreadingspeed.答案：B分析：根據(jù)“Membersusuallymeetregularlytodiscussaparticularbook”可知選B。18.Whatcanbookclubdiscussionsdo?A.Makeyouforgetthebook.B.Makethebookmoreboring.C.Deepenyourunderstandingofthebook.D.Makeyoureadfaster.答案：C分析：文中說“Thesediscussionscandeepenyourunderstandingofit”，選C。19.Whatelsedosomebookclubsdo?A.Theyorganizefitnessactivities.B.Theyorganizecookingclasses.C.Theyorganizeauthorvisitsorbook-relatedoutings.D.Theyorganizeartexhibitions.答案：C分析：文中提到“Somebookclubsevenorganizespecialevents,suchasauthorvisitsorbook-relatedoutings”，選C。篇章二Theimportanceofsleepcannotbeoverstated.Lackofsleepcanhaveanegativeimpactonourphysicalandmentalhealth.Whenwedon'tgetenoughsleep,wemayfeeltiredduringtheday,havedifficultyconcentrating,andbemorepronetomoodswings.Chronicsleepdeprivationhasbeenlinkedtoanumberofhealthproblems,includingobesity,diabetes,andhighbloodpressure.Itcanalsoweakenourimmunesystem,makingusmorelikelytogetsick.Toimproveoursleepquality,weshouldestablisharegularsleepschedule.Gotobedandwakeupatthesametimeeveryday.Avoidusingelectronicdevicesbeforebedtime,asthebluelighttheyemitcansuppresstheproductionofmelatonin,ahormonethatregulatessleep.20.Whatistheimpactoflackofsleeponourmentalstate?A.Itmakesusmoreenergetic.B.Itcausesdifficultyconcentratingandmoodswings.C.Itimprovesourmemory.D.Itmakesusmorecreative.答案：B分析：文中提到“Whenwedon'tgetenoughsleep,wemayhavedifficultyconcentrating,andbemorepronetomoodswings”，選B。21.Whathealthproblemsischronicsleepdeprivationlinkedto?A.Toothdecay.B.Skinproblems.C.Obesity,diabetes,andhighbloodpressure.D.Eyeproblems.答案：C分析：文中說“Chronicsleepdeprivationhasbeenlinkedtoanumberofhealthproblems,includingobesity,diabetes,andhighbloodpressure”，選C。22.Howcanweimproveoursleepquality?A.Stayuplateonweekends.B.Useelectronicdevicesbeforebedtime.C.Establisharegularsleepschedule.D.Drinkcoffeebeforebedtime.答案：C分析：文中提到“Toimproveoursleepquality,weshouldestablisharegularsleepschedule”，選C。篇章三Volunteeringisagreatwaytogivebacktothecommunityandmakeapositiveimpact.Therearemanydifferenttypesofvolunteeropportunitiesavailable.Youcanvolunteeratalocalsoupkitchen,helpingtoservemealstothehomeless.Anotheroptionistovolunteeratananimalshelter.Youcantakecareoftheanimals,cleantheircages,andsocializewiththem.Somepeoplevolunteeratschools,tutoringstudentsorhelpingwithextracurricularactivities.Volunteeringnotonlybenefitsthecommunitybutalsothevolunteersthemselves.Itcanboostyourself-esteem,asyoufeelasenseofaccomplishmentfromhelpingothers.Itcanalsohelpyoudevelopnewskillsandexpandyoursocialnetwork.23.Wherecanyouvolunteertoservemealstothehomeless?A.Atalocalhospital.B.Atalocalsoupkitchen.C.Atalocalpark.D.Atalocallibrary.答案：B分析：文中提到“Youcanvolunteeratalocalsoupkitchen,helpingtoservemealstothehomeless”，選B。24.Whatcanyoudoatananimalshelter?A.Teachtheanimalstoperformtricks.B.Takecareoftheanimalsandcleantheircages.C.Selltheanimals.D.Buildnewcagesfortheanimals.答案：B分析：文中說“Atananimalshelter,youcantakecareoftheanimals,cleantheircages,andsocializewiththem”，選B。25.Whatarethebenefitsofvolunteeringforthevolunteers?A.Itmakesthemfeellonely.B.Itdecreasestheirself-esteem.C.Itboostsself-esteem,developsnewskills,andexpandsthesocialnetwork.D.Itcausesstress.答案：C分析：文中提到“Volunteering...canboostyourself-esteem...Itcanalsohelpyoudevelopnewskillsandexpandyoursocialnetwork”，選C。閱讀理解部分詞匯理解（共10題，每題0.5分，共5分）Directions:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.TheInternethasbecomeanimportantpartofourlives.Ithas26thewaywecommunicate,work,andaccessinformation.Withjustafewclicks,wecanconnectwithpeoplearoundtheworld,findanswerstoourquestions,andshopforalmostanything.However,theInternetalsohasits27.Oneofthebiggestproblemsisonlineprivacy.Ourpersonalinformation,suchasournames,addresses,andcreditcardnumbers,canbeeasily28ifwe'renotcareful.Hackerscanstealthisinformationanduseitforillegalpurposes.Anotherissueisonline29.ThereisalotoffalseandmisleadinginformationontheInternet.Weneedtobeableto30reliablesourcesfromunreliableones.Todealwiththeseproblems,weshouldtakesome31measures.Forexample,weshouldusestrongpasswordsandavoidsharingsensitiveinformationonpublicWi-Finetworks.Weshouldalsobemore32whenevaluatingonlineinformation.Inaddition,thegovernmentandInternetserviceprovidersshouldplayarolein33theInternet.Theycanmakeandenforcelawstoprotectourprivacyandensurethe34ofonlineinformation.Overall,theInternetisapowerfultool,butweneedtouseit35toavoiditsnegativeeffects.A)advantagesB)disadvantagesC)distinguishD)protectE)secureF)stolenG)controlledH)regulatedI)evaluateJ)appropriateK)cautionL)cautiousM)authenticityN)transformedO)fraud26.答案：N分析：這里說互聯(lián)網(wǎng)改變了我們交流、工作和獲取信息的方式，transformed有“改變”之意，符合語境。27.答案：B分析：從后面提到的網(wǎng)絡(luò)隱私等問題可知，這里說互聯(lián)網(wǎng)也有缺點，disadvantages正確。28.答案：F分析：根據(jù)后面黑客偷信息可知，個人信息可能被偷，stolen合適。29.答案：O分析：結(jié)合后面有很多虛假誤導(dǎo)信息，可知是網(wǎng)絡(luò)欺詐問題，fraud符合。30.答案：C分析：要能區(qū)分可靠和不可靠的信息源，distinguish有“區(qū)分”之意。31.答案：J分析：我們要采取合適的措施，appropriate表示“合適的”。32.答案：L分析：評估網(wǎng)絡(luò)信息時要更謹(jǐn)慎，cautious是“謹(jǐn)慎的”。33.答案：H分析：政府和網(wǎng)絡(luò)服務(wù)提供商應(yīng)在規(guī)范網(wǎng)絡(luò)方面發(fā)揮作用，regulated表示“規(guī)范”。34.答案：M分析：要確保網(wǎng)絡(luò)信息的真實性，authenticity是“真實性”。35.答案：E分析：我們要安全地使用網(wǎng)絡(luò)，secure有“安全地”意思。長篇閱讀（共10題，每題1分，共10分）Directions:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2.TheFutureofTransportationA)Thetransportationindustryisonthevergeofamajortransformation.Withtherapiddevelopmentoftechnology,weareseeingtheemergenceofnewformsoftransportationthatcouldrevolutionizethewaywetravel.Electricvehicles(EVs),autonomousvehicles(AVs),andhyperloopsystemsarejustsomeoftheinnovationsthatareshapingthefutureoftransportation.B)Electricvehicleshavecomealongwayinrecentyears.Theyofferseveraladvantagesovertraditionalgasoline-poweredcars.Forone,theyaremoreenvironmentallyfriendly,astheyproducezerotailpipeemissions.Thishelpstoreduceairpollutionandcombatclimatechange.Additionally,EVsareoftencheapertooperate,aselectricityisgenerallylessexpensivethangasoline.C)Autonomousvehiclesareanotherexcitingdevelopment.Theseself-drivingcarshavethepotentialtomakeourroadssafer.Humanerrorisamajorcauseoftrafficaccidents,andAVscaneliminatethisfactor.Theyusesensorsandalgorithmstonavigatetheroads,makingdecisionsbasedonreal-timedata.However,therearestillsomechallengestoovercome,suchaslegalandethicalissues.D)Thehyperloopisahigh-speedtransportationsystemthatcouldpotentiallytravelatspeedsofupto700milesperhour.Itconsistsofpodsthattravelthroughalow-pressuretube.Thistechnologyhasthepotentialtosignificantlyreducetraveltimebetweencities.Forexample,atripfromLosAngelestoSanFrancisco,whichcurrentlytakesaboutsixhoursbycar,couldbecompletedinjust30minutesonahyperloop.E)Inadditiontothesenewtechnologies,thereisalsoagrowingtrendtowardssharedtransportation.Ride-sharingserviceslikeUberandLyfthavebecomeverypopularinrecentyears.Theyallowpeopletosharerides,reducingthenumberofcarsontheroadandloweringtrafficcongestion.Bike-sharingandscooter-sharingprogramsarealsobecomingmorecommoninurbanareas.F)However,thetransitiontoanewtransportationfutureisnotwithoutitsdifficulties.Oneofthemainchallengesisthehighcostofdevelopingandimplementingthesenewtechnologies.Forexample,buildingahyperloopsystemrequiresahugeamountofinvestment.Anotherchallengeistheneedtoupgradeexistinginfrastructuretoaccommodatethesenewformsoftransportation.G)Therearealsosocialandculturalfactorstoconsider.Somepeoplemayberesistanttochange,especiallywhenitcomestogivinguptheirpersonalcars.Theremayalsobeconcernsaboutjoblossesinthetransportationindustry,asAVsandotherautomatedtechnologiescouldreplacehumandrivers.H)Despitethesechallenges,thefutureoftransportationlookspromising.Governmentsandprivatecompaniesareinvestingheavilyinresearchanddevelopmenttomakethesenewtechnologiesmoreaccessibleandreliable.Asthesetechnologiesbecomemorewidespread,wecanexpecttoseeasignificantimprovementintheefficiencyandsustainabilityofourtransportationsystems.36.Electricvehiclesaremoreenvironmentallyfriendlyandcheapertooperatecomparedtotraditionalcars.答案：B分析：B段明確提到電動車比傳統(tǒng)汽油車更環(huán)保且運(yùn)營成本更低。37.Autonomousvehiclescanmakeroadssaferbyeliminatinghumanerror,buttherearelegalandethicalchallenges.答案：C分析：C段指出自動駕駛汽車能消除人為錯誤使道路更安全，同時存在法律和倫理問題。38.Thehyperloopisahigh-speedsystemthatcouldgreatlyreducetraveltimebetweencities.答案：D分析：D段描述了超級高鐵能大幅減少城市間的旅行時間。39.Sharedtransportation,likeride-sharingandbike-sharing,isbecomingmorepopularandcanreducetrafficcongestion.答案：E分析：E段提到共享交通越來越受歡迎且能減少交通擁堵。40.Thetransitiontoanewtransportationfuturefaceschallengessuchashighcostsandinfrastructureupgrades.答案：F分析：F段說明了向新交通未來過渡面臨成本高和基礎(chǔ)設(shè)施升級的挑戰(zhàn)。41.Somepeoplemaybereluctanttochangeandthereareconcernsaboutjoblossesinthetransportationindustry.答案：G分析：G段提到一些人可能抗拒改變，以及交通行業(yè)可能存在失業(yè)擔(dān)憂。42.Thetransportationindustryisabouttoexperienceamajortransformationduetonewtechnologies.答案：A分析：A段表明交通行業(yè)因新技術(shù)即將經(jīng)歷重大變革。43.GovernmentsandprivatecompaniesareinvestinginR&Dtomakenewtransportationtechnologiesmoreaccessibleandreliable.答案：H分析：H段說政府和私人公司在研發(fā)上大力投資使新技術(shù)更易獲取和可靠。44.Thehigh-speedhyperlooppodstravelthroughalow-pressuretube.答案：D分析：D段提到超級高鐵的艙體在低壓管道中運(yùn)行。45.Electricvehiclesproducezerotailpipeemissions,whichhelpsreduceairpollution.答案：B分析：B段提到電動車零尾氣排放有助于減少空氣污染。仔細(xì)閱讀（共10題，每題2分，共20分）PassageOneInrecentyears,theconceptofa"digitaldetox"hasgainedpopularity.Adigitaldetoxreferstoaperiodoftimeduringwhichapersondeliberatelydisconnectsfromdigitaldevicessuchassmartphones,tablets,andcomputers.Theideabehindadigitaldetoxistoreducethenegativeeffectsofexcessivedigitaldeviceuse.Excessiveuseofdigitaldeviceshasbeenlinkedtoanumberofproblems.Itcanleadtoeyestrain,neckandbackpain,andsleepdisorders.Itcanalsocausesocialisolation,aspeoplemayspendmoretimeinteractingwithscreensthanwithreal-lifepeople.Inaddition,theconstantexposuretodigitalinformationcanbeoverwhelmingandcausestress.Manypeoplefindthattakingadigitaldetoxhelpsthemtofeelmorerelaxedandfocused.Theyreporthavingmoretimeforactivitiessuchasreading,exercising,andspendingtimewithfamilyandfriends.Somepeopleevenclaimthatadigitaldetoxhasimprovedtheirrelationships,astheyaremorepresentandengagedwheninteractingwithothers.However,goingonadigitaldetoxisnotalwayseasy.Intoday'sdigital-age,ourlivesarehighlydependentondigitaldevices.Weusethemforwork,communication,entertainment,andevenshopping.Itcanbedifficulttobreakawayfromthishabit.Tomakeadigitaldetoxmoresuccessful,itisrecommendedtosetcleargoalsandaspecifictimeframe.Forexample,youcoulddecidetotakeaone-weekdigitaldetox,duringwhichyouonlyuseyourphoneforessentialcallsandtexts.Youcouldalsofindalternativeactivitiestoreplacedigitaldeviceuse.Forinstance,insteadofscrollingthroughsocialmedia,youcouldgoforawalkorreadabook.46.Whatisadigitaldetox?A.Awaytocleandigitaldevices.B.Aperiodofdisconnectingfromdigitaldevices.C.Anewtypeofdigitalservice.D.Amethodofimprovingdigitalskills.答案：B分析：文中明確提到“Adigitaldetoxreferstoaperiodoftimeduringwhichapersondeliberatelydisconnectsfromdigitaldevices”，所以選B。47.Whatproblemscanexcessivedigitaldeviceusecause?A.Onlyphysicalproblems.B.Onlymentalproblems.C.Bothphysicalandmentalproblems.D.Noproblemsatall.答案：C分析：文中提到過度使用數(shù)字設(shè)備會導(dǎo)致眼疲勞、頸背疼痛等身體問題，也會導(dǎo)致社交孤立、壓力等心理問題，所以選C。48.Whyisitdifficulttogoonadigitaldetox?A.Becausedigitaldevicesarenotinteresting.B.Becausewearehighlydependentondigitaldevices.C.Becausetherearenoalternativeactivities.D.Becausewedon'tknowhowtodoit.答案：B分析：文中說“ourlivesarehighlydependentondigitaldevices”，所以難以進(jìn)行數(shù)字排毒，選B。49.Howcanwemakeadigitaldetoxmoresuccessful?A.Byusingdigitaldevicesmoreoften.B.Bysettingcleargoalsandfindingalternativeactivities.C.Byonlyusingdigitaldevicesonweeken