Ifyouwanttoimproveyourchild’sresultsatschool,youcoulddoalotworsethanensuringthattheydoplentyofexercise.Scientistshavealreadyshownthatphysicalactivitycanmakeyoubrainier.ButateaminAmericahasusedscansto

　　Ifyouwanttoimproveyourchild’sresultsatschool,youcoulddoalotworsethanensuringthattheydoplentyofexercise.Scientistshavealreadyshownthatphysicalactivitycanmakeyoubrainier.ButateaminAmericahasusedscanstoshowthatanimportantpartofthebrainactuallygrowsinchildrenwhoarefit.Theseyoungsterstendtobemoreintelligentandhavebettermemoriesthanthosewhoareinactive.

　　Scientistsalsofoundthatoneofthemostimportantpartsoftheirbrainswas12percentlargerthanthoseofunfitchildren.Theybelievethatencouragingchildrentotakeexercisefromaveryyoungagecouldhelpthemdobetteratschoollater.ResearchersfromtheUniversityofIllinois,intheU.S.,studiedthebrainsof49childrenagednineandtenusingamagneticresonanceimagingscan(核磁共振摄影扫描),atechniquewhichprovidesverydetailedpicturesoforgansandtissuesinthebody.

　　Theyalsotestedthefitnesslevelsofthechildrenbymakingthemrunonatreadmill(跑步机).Thescientistsfoundthatthehippocampus,apartofthebrainresponsibleformemoryandlearning,wasaround12percentlargerinthefitterchildren.

　　ProfessorArtKramer,wholedthestudypublishedinthejournalBrainResearch,saidthefindingshadimportantimplicationsforencouragingindividualstotakepartinsportfromayoungage.“Weknewthatexperienceandenvironmentalfactorsandsocioeconomicstatusallimpactbraindevelopment,”hesaid.“Ifyougetsometerriblegenesfromyourparents,youcan’treallyfixthat,andit’snoteasytodosomethingaboutyoureconomicstatus.Buthere’ssomethingthatwecandosomethingabout.”

　　小题1:Ifyouwanttoimproveyourchildren’sresultinschool,____________.A．itisworsetoensurethattheydoplentyofexerciseB．youcanhavetheirbrainscannedC．itcouldbebettertomakesurethattheydoalotofexerciseD．youcandoalotexceptensuringthattheydoexercise小题2:Accordingtothepassage,whichofthefollowingstatementsisNOTtrue?A．Thefitnesslevelofthechildrenislinkedtotheirintelligence.B．Childrenwhohavealargerhippocampuswillprobablyhavebettermemories.