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1、专业.专注广安市2017高考英语阅读理解一轮系列训练（96）阅读理解。阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。Areyoupreparingforabigtest?Ifso,youmaywanttogoplaysomebasketballinbetweenhittingthebooks.Doctorsarestartingtofindmoreandmoreinformationthatsuggestsaconnectionbetweenexerciseandbraindevelopment.JudyCame
2、ron,ascientistatOregonHealthandScienceUniversity,studiesbraindevelopment.Accordingtoherresearch,itseemsthatexercisecanmakebloodvessels(血管),includingthoseinthebrain,strongerandmorefullydeveloped.DoctorCameronissurethatthisallowspeoplewhoexercisetothinkbetter.Asshesays,“wh
3、ilewealreadyknowthatexerciseisgoodfortheheart,exercisecanactuallycausephysicalchangesinthebrain.”Theeffectsofexerciseonbraindevelopmentcanevenbeseeninbabies.Babieswhodoactivitiesthatrequiresalotofmovementandphysicalactivityshowgreaterbraindevelopmentthanbabieswhoarelessp
4、hysicallyactive.Evenalittlemovementcanshowbigresults.MargaretBarnes,ascientist,alsobelievesintheimportanceofexercise.Shethinksthatmanylearningdisabilitiesthatchildrenhaveinprimaryschoolorhighschoolcanresultfromalackofmovementasbabies.“Babiesneedmovementthatencouragesande
5、xcitestheirfivesenses.Theyneedtosetupaconnectionbetweenmotionandmemory.Inthisway,astheygetolder,childrenwillbegintoconnectphysicalactivitywithhigherlearning,”saysMargaret.Olderpeoplecandeveloptheirbrainsaswell.CornellUniversitystudiedagroupofseniorswhohaveashort—termmemo
6、ryincreaseofupto40percentafterexercisingjustthreehoursaweek.Theexercisedoesnothavetobeverydifficult,butitdoeshavetoincreasetheheartrate.Also,justlikethemotionforbabies,exerciseforolderpeopleshouldnotbetoosimple.Learningsomenewskillsoractions,suchaswithyogaortai-chihelpst
7、oopenupmemorypathsinthebrainthatmaynothavebeenusedforalongtime.Formostpeople,anytypeofphysicalactivitythatincreasestheheartrate学习参考专业.专注ishelpful.Themainaimistoincreasethebrain’sflowofblood.Andyourbraincanbenefitfromaslittleastwotothreehoursofexerciseaweek.1.Whatisthemai
8、nideaofthispassage?A.Howexercisemakespeoplestrong.B.Howtogetgoodscoresonatest.C.Howexercisehelpsthebrai
