如果您无法下载资料，请参考说明：
1、部分资料下载需要金币，请确保您的账户上有足够的金币
2、已购买过的文档，再次下载不重复扣费
3、资料包下载后请先用软件解压，在使用对应软件打开
第PAGE\*MERGEFORMAT4页共NUMPAGES\*MERGEFORMAT4页 新编六级听力每日练习第264期 PassageTwo29.A.CocaCola.B.Sausage.C.Milk.D.Friedchicken.30.A.Hehashadthirteendecayedteeth.B.Hedoesn'thaveasingledecayedtooth.C.Hehasfewerdecayedteeththanotherpeopleofhisage.D.Heneverhadasingletoothpulledoutbeforehewasfifty.31.A.Brushyourteethrightbeforeyougotobedintheevening.B.Haveasfewofyourteethpulledoutaspossible.C.HaveyourteethX-rayedatregularintervals.D.Cleanyourteethshortlyaftereating.PassageTwoHowmanyteethhaveyouhadfilledinthepasttwoyears?IfyoufollowtheadviceofDr.Faustick,youmaybeabletoreducethenumberofyourvisitstoadentist.Dr.Faustickconductedatwo-yearsurveytofindouthowtopreventorreducedentaldecay.946studentstookpartintheexperiment.523studentscleanedtheirteethwithintenminutesofeating.Whenpossible,theyusedatoothbrush;whenthiswasimpossible,theywashedtheirmouththoroughlywithwater.Theremaining423studentsmerelycleanedtheirteethwhentheywenttobedandwhentheygotupinthemorning.AllthestudentshadtheirteethX-rayedattheendofthefirstandsecondyears.Attheendofthefirstyear,thenightandmorninggrouphadthreetimesasmanydecayedteethastheclean-after-each-mealgroup.Attheendofthesecondyear,thelattergrouphad53percentfewerdecayedteeththantheformergroup.Dr.Faustickhascleanedhisteethaftereverymealforthirteenyearsand[30]hasnothadasingledecayedtooth.Hepointedoutthat[29]sugarisamajoragentindentaldecay,particularlythesugarinsweets,cakes,andsoftdrinks.[31]Ideallyyoushouldkeepatoothbrushinyourpocketanduseitimmediatelyafteryouhavefinishedeating.Whenthisisimpractical,youcanatleastmakesurethatyouhaveadrinkofwaterandletthewaterthroughyourteethtoforceoutanyparticlesoffood.7outof10peopleloseatleasthalftheirteethbythetimetheyarefifty.Manyhaveacompletesetoffalseteethbythattime.Inanycase,neithertoothachenoravisittoadentistisverypleasant.Soitisworthwhilemakinganefforttokeepyourownteethaslongaspossible.Themainpreventativeagentissimplywater.Questions29to31arebasedonthepassageyouhavejustheard.29.Accordingtothepassage,whattypeoffoodordrink
王子****青蛙
实名认证
内容提供者
实名认证
内容提供者
最近下载
