worldthatcannotbereachedbywater.However,Indianapolisisacitythroughwhichmanyrailways,roads,busesandplanespass.Therearemanyfactorieswhichmaketrucks,farmtools,andelectricalthings.Thesefactoriescauselittlepollutionforthecity.ButlerUniversity,well-knownforengineering,andthelawandmedicalschoolsofIndianaUniversity,areinthecitycentre.NearbyistheIndianapolisracecourse,wherethenation'smostfamouscarraceisheldeachyearonMay30th.IfyouvisitedIndianapolisyouwouldbeabletofindyourwayaroundeasilybecausemostofthestreetscrosseachotherlikeachessboard(棋盘).Inthecentreofthecity,calledtheCircle,standstheSoldiers'andSailors'Monument,100metreshigh.AlsointhecentretherearemanybuildingsmadeofthefamousIndianastone,whichmakesthemwhiteincolour.71.WhatisIndianapolisbestknownfor?A.Itsyearlymotorrace.B.Itsschoolsandlibraries.