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如图，在▱ABCD中，分别以边BC，CD作等腰△BCF，△CDE，使BC＝BF，CD＝DE，∠CBF＝∠CDE，连接AF，AE． （1）求证△ABF≌△EDA； （2）延长AB与CF相交于G．若...
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如图在等腰梯形ABCD中AD∥BC.O.是CD边的中点以O.为圆心OC长为半径作圆交BC边于点E.过
在□ABCD中分别以ADBC为边向内作等边△ADE和等边△BCF连结BEDF.求证四边形BEDF是平
如图等腰梯形ABCD中AD∥BCM.N.分别是ADBC的中点E.F.分别是BMCM的中点.1求证四边
如图在四边形ABCD中已知AD^CDAD=10AB=14ÐBDA=60°ÐBCD=135°求BC的长
如图等腰梯形ABCD中AD∥BCM.N.分别是ADBC的中点E.F.分别是BMCM的中点1求证四边形
1如图1正方形ABCD中点EF分别在边BCCD上∠EAF=45°延长CD到点G使DG=BE连结EFA
如图等腰梯形ABCD中A.D.∥BCM.N.分别是ADBC的中点E.F.分别是BMCM中点1求证四边
1如图1点E.F.分别在正方形ABCD的边BCCD上∠EAF=45°求证EF=BE+FD.2如图2四
如图在正方形ABCD中点E.F.分别在BCCD上且BE=CF求证△ABE≌△BCF.
在▱ABCD中分别以ADBC为边向内作等边△ADE和等边△BCF连接BEDF.求证:四边形BEDF是
如图等腰梯形ABCD中AD∥BCM.N.分别是ADBC的中点E.F.分别是BMCM的中点1求证四边形
如图已知梯形ABCDAD∥BCAF交CD于E.交BC的延长线于F.1若∠B.＋∠DCF＝180º求证
如图四边形ABCD是正方形△ECF是等腰直角三角形其中CE=CFG.是CD与EF的交点.⑴求证△BC
如图在四棱锥P.－ABCD中PD⊥面ABCDAD∥BCCD=13AB=12BC=10AD＝12BC.
如图在等腰梯形ABCD中M.N.分别为ADBC的中点E.F.分别为BMCM的中点1求证△ABM≌△C
1如图1正方形ABCD中点EF分别在边BCCD上∠EAF=45°延长CD到点G使DG=BE.连结EF
1如图正方形ABCD中点E.F.分别在边BCCD上∠EAF=45°延长CD到点G.使DG=BE连结E
在平行四边形ABCD中分别以ADBC为斜边向内作等腰直角△ADE和等腰直角△BCF连接BEDF求证
如图等腰梯形ABCD的对角线长为13点E.F.G.H.分别是边AB.BC.CD.DA的中点则四边形E
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如图E.F.分别是正方形ABCD的边BCCD上的点BE=CF连接AEBF将△ABE绕正方形的中心按逆
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VisitChicagoChildren'sMuseum Inbrief Thismuseumoffersplentyoffunhands﹣onactivitiesforkids.HoweverthisisoneofthefewChicagomuseumsnotfunforthewholefamilyasadultsandolderkidswillbeboredtotears. Address700EastGrandAve.NavyPierChicago Phone312﹣527﹣1000 Publictransportation CTAbuslines#29StateStreet#65GrandAvenueand#66ChicagoAvenueallserveNavyPier. Parkingfees •MondaythroughThursday﹩20 •FridaythroughSunday﹩24 •Holidays24 Openinghours •Weekdays10am﹣5pm •Weekends10am﹣8pm Entrancefees •Adults﹩12 •Children﹩12 •Seniors65+﹩11 •Childrenunder5free Activities LocatedatoneofChicago'stoptouristattractionsNavyPierthemuseumoffersthreefloorsofactivitiesforkidsincluding •PlayItSafe﹣﹣allabouthomesafety •InventingLab﹣﹣providespartsandinstructionsforcreatingthings •KidsTown﹣﹣aplayroomrecreatingaChicagoneighborhoodwherekidscanpretendtodothingslikeshoppingforgroceriesanddrivingaCTAbus •ClimbingSchooner﹣﹣athree﹣floorclimbingbuilding •MyMuseum﹣﹣kidsgettocreatevariouspiecesofartthatareallaboutme •Skyline﹣﹣kidslearnaboutskyscrapersanddesigntheirownbuildings •TreeHouseTrails﹣﹣aplayareadesignedlikeaforest •Waterways﹣﹣wateractivitiesshowinghowpumpsanddamswork 1HowmuchwillJohn10hisparents40andsister6payiftheydrivetothemuseumat2pmonMonday? A.﹩36. B.﹩48. C.﹩56. D.﹩68. 2Kidswhoarefondofcreatingworksofartshouldchoose. A.PlayItSafe B.InventingLab C.MyMuseum D.Skyline 3IfyougotoKidsTownyoucan. A.goonashorttriptoaforest B.buysomegiftsforyourfriends C.knowmoreaboutpumpsanddams D.experienceChicagoneighborhoodlife 4WhatcanweknowaboutChicagoChildren'sMuseum? A.Itisathree﹣floorbuilding. B.Itisnotfitforadultsorolderkids. C.ItisthemostpopularmuseuminChicago. D.ItisoneofChicago'stoptouristattractions.
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每年的10月31日是联合国确定的世界勤俭日.假设你是李华你最近给你在美国的朋友Mike的一封e﹣mail中专门讨论了勤俭的问题.你的e﹣mail内容应包括 1指出校园内中学生花钱如水没有节约的概念. 2分析产生这一现象的原因独生子女生活水平的提高追求时髦 3你对节俭的看法. 注意 1字数110左右. 2开头和结尾已写好不计入总字数. 3参考词汇世界勤俭日WorldThriftDay花销expenditure现象phenomenon奢侈extravagance这个提示不要为好范文中并未用到有了反而增加了难度 DearMike How'severythinggoing? AsyouknowWorldThriftDayfallsonOctober31.SothistimeI'dliketodiscussthriftwithyou.Inrecentyearsthemonthlyexpenditureofmiddleschoolstudentshasbeenonthesharprise.. Howaboutyourpointaboutthrift? Bestwishes! Yoursfaithfully LiHua
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Iwaselevenyearsoldwhenthefirebrokeoutthatyear.IstoodoutsideinjustmyunderwearwhileIwatchedthe1thatIgrewupinrapidlyburntothe2.AfewminutesearlierIhadbeen3asleepinmynicewarmbedwhena4wokemeup.Mymum'sbedroomwasjustnexttomineandmybrother's.Afirehadbrokenoutthereand5her.WhileIstumbled跌跌撞撞地走aroundinthe6anddarknesssheranfromroomtoroomquicklywakingeveryoneinthehouse.Thehousehoweverwasover50yearsoldandmadeofwood.Beforewecoulddoanythingthefire7it.Weallbarely8outsidebeforethe9engulfed吞没everyroom. Istoodthere10whilethefiredestroyedmybooksclothesandtoys.Iwatched11whilemymumcriedandmyDadswore.I12whatwasgoingtohappentous13wehadlostallofourthings.AsIlookedaroundthoughIrealizedsomethingforthefirsttimeThethingsthat14aren'tthings.Irealizedatthatmomentthatwewereallalive.15thatwasessentialhad16thefire.Wewouldallbearoundtoloveeachotherformanyyearstocome.Andthatwasallthatmattered. Istillthinkofthatfireinthe17thathelpedmetobecomewhoIamtoday.Itshowedmefortheveryfirsttimewhatistruly18inthislife.Ithelpedmetolearnthatthelovewe19isfarmoreimportantthanthethingswe20. 1A.room B.house C.floor D.yard 2A.ground B.field C.ashes D.ruins 3A.loud B.quick C.good D.sound 4A.call B.scream C.voice D.noise 5A.caught B.frightened C.awakened D.denied 6A.smoke B.fire C.light D.noise 7A.spared B.possessed C.consumed D.found 8A.gotit B.madeit C.putit D.triedit 9A.flames B.dust C.silence D.fear 10A.nodding B.watching C.trembling D.staring 11A.curiously B.bravely C.peacefully D.helplessly 12A.wandered B.wondered C.fancied D.amazed 13A.nowthat B.enenif C.asif D.sothat 14A.rely B.mind C.matter D.value 15A.Something B.Everything C.Nothing D.Anything 16A.escaped B.saw C.survived D.passed 17A.afternoon B.day C.morning D.night 18A.basic B.reliable C.useless D.essential 19A.share B.protect C.feed D.remember 20A.apply B.aim C.support D.possess
Geneticengineeringinitsbroadestdefinitionmeanstocontrolaspeciessothataparticulartraitisincreasedinthepopulation.Atraitishowanorganism有机体looksoractsorwhatitdoes.Havingbrowneyesisatrait.Flyingincirclesisatrait.Climbingtreesisatrait. Theearliestformsofgeneticengineeringoccurredonfarms.Peopleselectedseedsfromplantsthathadmorefruitproductionortastierleavesthanotherplantsoftheirtypes.Thentheychosetosavetheseedsfromthebestofthatgrouptosowthenextyear.Soyearbyyearthefarmersproducedbetterandbettercrops.Thistypeofactivityprobablyhasbeengoingonsincemankindfirstsettledinvillagesandbeganmakingalifeforthemselvesinonelocationabout12000yearsago! Thesamesortofthingwouldhavealsohappenedwithanimals.Forexamplepeoplechosetoeattheanimalsthatdidn'thavefavorabletraitsandlettheanimalswiththefavorabletraitsreproduce.Itwasthousandsofyearsbeforemankindfiguredouthowplantsandanimalsreproducethemselves.Withthisknowledgepeoplecouldpollinate授粉plantsbyhandorkeepapairofanimalstogetherinordertodeliberatelycauseanincreaseinafavorabletrait. Itwasonlyinthelast250yearsthatscientistsbeganfiguringoutchromosomes染色体andgenesandtheroletheyplayinthewayonegenerationpassesitstraitsontothenext.Andit'sonlybeeninthelast30yearsthatscientistshavebeenabletocutoutspecificgenesfromoneorganismandputtheminanother.Itisthis30﹣year﹣oldtechnologythatisdescribedbythenarrowdefinitionofgeneticengineering.Mankindhaslongbeenabletohaveadeliberateimpactontheworldaroundhim.Henowpossessesthetoolstodeliberatelyimpacthimself.Somepeopleareafraidofwhatmightbedonewiththatpower. 1Thetextismainlydevelopedby. A.askingquestions B.examiningdifferences C.makingcomparisons D.givingexamples 2Paragraph2mainlytalksabout. A.thespreadofgeneticengineering B.theadvantageofgeneticengineering C.theoriginalapplicationofgeneticengineering D.thepopularityofgeneticengineering 3Theunderlinedwordtheminthelastparagraphrefersto. A.specificgenes B.specialtraits C.chromosomes D.scientists 4Whatcanwelearnaboutgeneticengineeringfromthelastparagraph? A.Ithasahistoryof250yearsbythenarrowdefinitionofgeneticengineering. B.Scientistsdon'tknowhowtomakegooduseofit. C.Peoplehaveamisunderstandingofitinthepast30years. D.Itisbecomingapowerfultoolofmankind.
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Duringthecourseofalifetimeweallmakemistakes.Andoftenwetakeforgrantedwhatwehavethinkingthatwe1whatwealreadyhaveorbelievingthatwewillneverneedanyoneto2usoutfromdifficultand3times. Suchwasthe4ofCecilia.Ceciliahadagreatjobanicehouseandeverythingsheneeded5shewasnotakindpersonforseveralreasonsthatbecame6onceyougottoknowher.Thefirstthingwasherlackof7forotherswhowerenotasfortunateasshewas.Shewouldnothelpanyone8wouldsheevenbegintoexpressanysympathyforanyone'stroubles.Her9wasthattheywerejusttoolazy. Butthencamethecatastrophicday.Herhusbandgotintofinancialdifficultytothepoint10hewasforcedtodeclarebankruptcy破产.Shefoundthatshewastheonewho11nothing. Nowshewas12forhelp.Shealsofoundoutthatherparentswereunwillingtohelpherbut13forherhisfamilywaswillingandabletohelpthemthroughthesedifficulttimesdespitethe14thatshehaddeliberatelykeptthemoutofherlife.15Ceciliawasassistedthroughchallengingtimesonce16shechangedtohertrueself. Butthisisnotthemainpointofthestory.Weallneedhelp17alonglife'spathwhetherwethinkwewillornot.Andifyouaretheone18helpjustrememberthisnomatterwhat19lateryouwillalwaysbe20inthefactthatyouhaveremainedstrongandtruetoassistthosethatneedyourhelp. 1A.realize B.treasure C.deserve D.manage 2A.help B.protect C.keep D.assume 3A.inspiring B.challenging C.pleasing D.moving 4A.character B.attitude C.case D.experience 5A.Therefore B.Otherwise C.Normally D.However 6A.obvious B.familiar C.unclear D.uncertain 7A.affection B.sympathy C.confidence D.caution 8A.so B.and C.or D.nor 9A.plan B.view C.promise D.advice 10A.when B.that C.where D.what 11A.learned B.shared C.knew D.had 12A.desperate B.enthusiastic C.considerate D.fearful 13A.unluckily B.fortunately C.sadly D.naturally 14A.section B.reason C.fact D.difficulty 15A.Nowthat B.Eventhough C.Aslongas D.Incase 16A.up B.away C.over D.apart 17A.somewhere B.everywhere C.anywhere D.nowhere 18A.refusing B.receiving C.owing D.giving 19A.happens B.comes C.develops D.forms 20A.involved B.anxious C.absorbed D.secure
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DonnaStricklandisaprofessorintheDepartmentofPhysicsandAstronomy.ProfessorStricklandisoneoftherecipients受领者oftheNobelPrizeinPhysics2018withGérardMourouherPhDsupervisoratthetime.TheypublishedthisNobel﹣winningresearchin1985whenStricklandwasaPhDstudentattheUniversityofRochesterinNewYorkstate.Togethertheypavedthewaytowardthemostintenselaserpulsesevercreated. ProfessorDonnaStricklandisonlythethirdwomanevertohavewonaNobelPrizeinphysics.SheandherfellowwinnerswerehonoredforwhattheNobelCommitteecalledground﹣breakinginventionsinlaserphysics.ProfessorStricklanddevisedawaytouselasersasveryprecisedrillingorcuttingtools.Millionsofeyeoperationsareperformedeveryyearwiththesesharpestoflaserbeams. ﹣﹣﹣Howsurprisingdoyouthinkitisthatyou'rethethirdwomantowinthisprize? ﹣﹣﹣Wellthatissurprisingisn'tit?Ithinkthat'sthestoryofMariathatpeoplewanttotalkabout﹣﹣﹣thatwhyshouldittake60years?Therearesomanywomenouttheredoingfantasticresearchsowhydoesittakesolongtogetrecognized? Physicsstillhasoneofthelargestgendergapsinscience.Onerecentstudyconcludedthatatthecurrentratesitwouldbemorethantwocenturiesuntiltherewereequalnumbersofseniormaleandfemaleresearchersinthefield. ThelastwomantowinaphysicsNobelwasGerman﹣bornMariaGoeppert﹣Mayerforherdiscoveriesaboutthenucleiofatoms.BeforethatitwasMarieCuriewhosharedthe1903prizewithherhusbandPierre.Thisyear'swinnershopethatbreakingthishalfcenturyhiatuswillmeanthefocusinfuturewillbeontheresearchratherthanthegenderoftheresearcher. 1Whichofthefollowingbestexplainsground﹣breakingunderlinedinParagraph2? A.active B.talented C.creative D.awesome 2WhatdoweknowaboutProfessorStrickland'sachievement? A.Shecreatedthemostintenselaserpulsesbyherself. B.Sheadvocatedequalitybetweenmanandwomen. C.Shediscoveredthenucleiofatomswithherhusband. D.Sheinventedawayofusinglasersasaccuratecuttingtools. 3WhenwasthesecondNobelPrizeinphysicsawardedtowoman? A.in1963 B.in1985 C.in1903 D.in1958 4Whatcanbeinferredfromthestatementsinparagraph4? A.Woman'sachievementsinphysicsareasgreatasman's. B.Woman'sachievementsinphysicsaremoreandmorefantastic. C.Maria'sdiscoveriesresultedfromherlongtimeresearch. D.Genderdiscriminationstillexistsinthefieldofscienceresearch.
HowCanIFightLaziness? Lazypeoplewillnevergainanythinginlife.Howeverlazinesscanbedefeatedonceafewchangeshavebeenmadeinyourmind. 1Manypeoplelacksleepconstantlysincetheystayuptoolateandgetuptooearlytoprepareforwork.Thesepeoplehavelittlemotivationoncetheyarrivehome.Lazinessworkshandinhandwithalackofmotivationandatendencytoputoffthings.Byadjustingyoursleepscheduletoprovideafewmorehoursofmeaningfulrestyoucanfightlazinessthroughouttheday. Anotherwaytofightlazinessistochangeyourmindfrompassivetoactive.Somepeopletreattheirlivesasiftheywerepushedfromtasktotask.Otherstakeamorepositiveapproachviewingeachtaskasachallengetheymustovercomealone.2 Somepeoplefightlazinessbyremovingthetemptations__thatsurroundthem.AtelevisioninthelivingroommayprovideentertainmentbutwatchingtoomuchTVoftencontributestolaziness.3Completeafewtasksandrewardyourselfwithwhatyouenjoysuchasagooddinnerorafilm. Lazinesscanalsobealastingproblemathome.Couplesandchildrenmayallhavedifferentenergylevelsbutlazinesscanbespreadifnotdealtwithimmediately.4Bethefirsttocollectandwashdishesafterameal.Othersinthehomemayeventuallyfollowyourexampleandperformtheirowntask.Itisdifficulttopracticelazinesswhenyouaresurroundedbymotivatedpeople. 5Enoughexerciseandabalanceddietcanhelpyoutodevelopahealthylifestylethusenablingyoutohavemoreenergyandhelpliftyourspirits. A.Tofightfamilylazinesssetanexample. B.Knowinghowtofightlazinessisimportant. C.Onewaytofightlazinessistogetenoughsleep. D.Finallytakingexerciseregularlycanhelpyoufightlaziness. E.Withstrongdeterminationyouwillbeabletoachieveyourgoal. F.Lazinessappearswhenyounolongerfeelinchargeofyourownmind. G.Createarewardsystemforyourselfjustasparentsdoforachild.
Afterseemedaverylongtimethebadly﹣woundedsoldiercamebacktolife. A.that B.it C.which D.what
MakingShortVideos Apictureisworthathousandwordsorsotheysay.Wellmotion运动picturescancontainevenmorememories.1Herearesomeappsyoucanusetomakeyourownshortvideos. Qupeiyin.cn RecitinglinesfrommoviesisaneffectiveandclassicwaytolearnEnglish.Sowhatifyoucoulddub配音recordingsaccompaniedbymovieclips剪辑andthensharethemwithfriends?2Younameit.Bycontributingyourvoiceyoucaneithermimic模仿theoriginalsoundtrackorcreatesomethingcompletelynewofyourown. Shorts 3WiththehelpoftheShortsappyoucanmakepicturesinyouralbumintoaslideshow.Choosefromanyoftheoff﹣the﹣shelfthemes﹣﹣﹣holidaytravelfriendshipandpartyforexample﹣eachmatchedwithitsownthememusicandslidebackground.Butifyou'renotsatisfiedwiththecombinationsfeelfreetodoalittlechangebyaddingtexttothepicturesorreplacingthemusicwithsomethinginyourownplaylist. VivaVideo Videomakingandeditingonceseemedawfullyhard.4Butthisappwilleaseyouintothefieldwithstraight﹣forwardfunctionsandcleardirectiontohelpyoucreateyourownvideostory.Apartfromfilterstickersandtextthecoolestpartofthisappisthatyoucanwritethenarrativesyourselfandaddyourownvoicetothevideo.5VivaVideorequiresarelativelypowerfulphonetorunsmoothly. A.Buthereisalittlereminder. B.That'swhyshortvideosarebecomingpopular. C.Theseappshaveavarietyofidentifications识别. D.ThisapphasmoviescartoonslecturesTVseries. E.Newbies网络新手andamateursdidn'tdaretoevengiveitatry. F.Videosandpicturesaren'tonlyforseparatepurposes. G.VideomakingandeditingiswhatApplefanswanttotry.
Nodecisionaboutanyfutureappointmentuntilallthecandidateshavebeeninterviewed. A.willbemade B.ismade C.isbeingmade D.hadbeenmade
Peoplebetteraccesstohealthcarethantheyusedtoandthey'relivinglongerasresult. A.willhave B.have C.had D.hadhad
Anoutbreakoffireoranaccidentisan突发事件.
Itwasthecultureratherthanthelanguagemadeithardforhimtoadapttothenewenvironmentabroad. A.where B.why C.that D.what
假定英语课上老师要求同桌之间交换修改作文请你修改同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删减把多余的词用斜线\划掉. 修改在错词下面划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. WhenIwasveryyoungmyparentsteachmethevalueofwritingthank﹣younotes.WhenevertheyaskedmetoIwouldrollmyeyesandwriteitafterbirthdaysandsomefestivalsunwilling.OnlyaftermygrandmotherpassedawayIrealizetheirimpact.MymomandIhadthetaskofcleanmygrandmother'shouse.IopenedadrawerinherbedsidetablewhichIfoundabeautifulwoodenbox.IopeneditbutwasshockedtoseeeverycardIhadeverwrittentoher.Theimpactofamomentstayedwithmeallmylife.WhenIhadchildrentheylearnedfromthevalueofwritingthank﹣younotesandstilldosoevenasgrownadult.
Howoftendoyouexercise?Anewstudyfoundthatmostkidsaged12to15weren'tgettingenoughphysicalactivity.Theresultswerebasedonabout800kids.Aspartofthestudythekidstrackedandreportedontheirownactivitylevelsandtookphysicalexams. U.S.fitnessguidelinessuggestanhourormoreofphysicalactivityeveryday.Accordingtothestudyonly1in4U.S.kidsgetenoughphysicalactivity. It'scertainlyworryingtoseethatourkidshavesuchalimitedamountofphysicalactivityeachdaysaidDr.StephenPont.Heisanexpertonchildren'shealth. Fewkidsinthestudymettheguidelinesonphysicalactivitythatraisestheheartrateandmakespeoplebreatheharder.Overallabout25%saidtheygotanhourofthatkindofexerciseeveryday.Kidsalsoreportedonwhichactivitiestheydidmostoftenoutsideofschoolgymclass﹣﹣basketballforboysandrunningforgirls. Thestudyfoundthatfatteenagerswerelessactivethannormal﹣weightgirlsandboys.Fatgirlswereslightlylessactivethannormal﹣weightgirlsbutlevelsweresimilaramongoverweightandnormal﹣weightboys.Thestudyalsosaidthatthepercentoffatchildrenaged2to19was17%orabout12.5millionkids. There'salwaysroomforimprovementsaidTalaFakhouriwhowastheleaderofthestudy.ShealsosaidtheresultsprovideusefulinformationtohelpwithfitnesscampaignssuchasLet'sMovewhichwasinitiatedbyMichelleObamain2010.ToinspirekidstoeatrightandgetinshapeMichellevisitsschoolsandholdsexerciseevents.Shealsocallsonschoolstoofferregulargymclasses. Thestudyalsofoundkidswhogetphysicaleducationatschoolmaygetbettergrades. 1Whatistheresultofthenewstudy? A.800kidsdon'tgetenoughphysicalactivity. B.MostU.S.kidsdon'tgetenoughexercise. C.Kidsshouldgetphysicalactivityeveryday. D.It'simportanttotakephysicalexams. 2Whichofthefollowingsportsdogirlslikebest? A.Swimming. B.Basketball. C.Running. D.Gym. 3What'sthepurposeofthecampaignLet'sMove? A.Tohelpkidstokeepfit. B.Toprovideusefulinformation. C.Toofferregulargymclasses. D.Toholdexerciseevents. 4Accordingtothestudychildrenwithenoughexercisemay. A.belessactivethanfatchildren B.bemorewillingtohelpothers C.dobetterintheirstudies D.trytheirbesttogetinshape
Beingphysicallyactivethreetimesaweekreducestheoddsofbeingdepressedbyabout16%accordingtonewUCLresearchcarriedoutaspartofthePublicHealthResearchCentre. ThestudypublishedinJAMAPsychiatryfoundatwo﹣wayrelationshipbetweendepressionandphysicalactivity.Peoplewhoincreasedtheirweeklyactivitywerereportedtohavefewerdepressivesymptomsbutthosewithmoredepressivesymptomswerelessactiveparticularlyatyoungerages. Researchersfollowed11135peoplebornin1958upuntiltheageof50recordingdepressivesymptomsandlevelsofphysicalactivityatregularintervalsinadulthood.Theyfoundthateachadditionalactivityperiodperweekreducedoddsofdepressionby6%.InEngland19%ofmenand26%ofwomenarecurrentlyclassedasinactiveandthisstudysuggeststhatactivitycouldsignificantlyimprovetheirmentalaswellasphysicalhealth. Assumingtheassociationiscausalphysicalactivityhasaprotectiveeffectagainstdepression.Ifanadultbetweenhistwentiesandfortieswhoisn'tphysicallyactivebecameactive3timesperweekhewouldreducehisrisksofdepressionbyabout16%saidDrSnehaloftheUCLInstituteofChildHealthleadauthorofthestudy. ProfessorMarkDirectorofthePublicHealthResearchCentresaidManypeoplearealreadyawareofthebenefitsofphysicalactivityontheirgeneralhealthbutnowweareseeingmoreevidencethatsuggestsitalsohasapositiveeffectonaperson'smentalwell﹣being.Thelatestresearchhighlightsjusthowimportantitistoensurethatpeopleareworkingandlivinginenvironmentsthatallowthemtobebothphysicallyactiveandmentallyhealthy. 1TheunderlinedwordoddsinParagraph1probablymeans. A.benefits B.intervals C.risks D.ages 2Accordingtothesecondparagraphifpeopleincreasetheirweeklyactivity. A.theirdepressivesymptomswillbefewer B.theirdepressivesymptomswillbemore C.theywillbecomemuchyounger D.theywillbecomemoredepressive 3WhichofthefollowingstatementsisTRUEaccordingtothepassage? A.DrSnehalthinksitisimportanttobebothphysicallyandmentallyhealthy. B.Theresearchshowsmenaremoreactiveinphysicalactivitythanwomen. C.Adultswhoinsistonphysicalactivitywillavoiddepressioncompletely. D.Increasingphysicalactivitycanfreepeoplefromdepressioninaway. 4Whatistheauthor'spurposeinwritingthepassage? A.Totellusafunstoryabouthowtoprotectusagainstdepression. B.Tointroducearesearchonthelinkbetweenphysicalactivityanddepression. C.Topersuadereaderstoincreasetheirweeklyactivity. D.Todescribethedisadvantagesofphysicalactivity.
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