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1、TheOlympicGames李仕才【阅读理解插花】VitaminBcouldhelpreducetheeffectsofthemostdangeroustypeofairpollution,accordingtoanewstudypublishedonMonday.Inthefirststudyofitskind,ateamofinternationalresearcherslookedintothedamagecausedbyoneofthepollutantsthathavetheseverestimpactonhealth—PM2.5.The
2、yfoundthatVitaminBsupplementcouldeffectivelyreducetheimpactofthetinyparticles(颗粒)onthehumanbody,althoughtheystressedthattheresearchwasinitsearlystages.AccordingtotheWHO,92%oftheworld’speoplearelivinginplaceswherethePM2.5levelgoesbeyondtherecommendedlevel.Soit’surgenttofindasolu
3、tiontotheproblem.Accordingtothisstudy,publishedinthePNAS,10volunteerswereinitiallyexposedtocleanairandgivenaplacebo(安慰剂)tochecktheirbaselineresponses.ThegroupthenkeptontakingplacebosforfourweeksbeforebeingexposedtoheavilypollutedairfromdowntownToronto,whereanestimated1,000carsp
4、assedeveryhour.Thebadairwasdeliveredtothevolunteersthroughan“oxygentype”facemask.Theexperimentwasthenrepeated,witheachvolunteertakingaVitaminBsupplementdaily,madeupof2.5mgoffolicacid,50mgofVitaminB6,and1mgofVitaminB12.VitaminB6canbefoundinliver,chicken,nutsandotherthings,andVit
5、aminB12infish,meat,eggs,milkandsomecereals.TheresearchersfoundthatfourweeksofVitaminBsupplementsreducedthedamageofPM2.5effectsby28-76%.TheresultsemphasizedhowpreventionatanindividuallevelcouldbeusedtofightagainstthedamageofPM2.5,theresearcherssaid.【文章大意】本文主要通过一些实验告诉我们维生素B对减轻PM2
6、.5对身体的伤害有什么样的功效。1.What’sthenewlydiscoveredeffectofVitaminBinParagraph1?A.Itcanbeusedtoreplaceothervitaminsinourdailylife.B.Itcanhelplowertheairpollutionlevelintheopenair.C.ItcanreducetheimpactofPM2.5onhumanbodies.D.Itcangetridofthepollutantsremaininginourbodies.【解析】选C。细节理解题。根据第
7、一段“VitaminBcouldhelpreducetheeffectsofthemostdangeroustypeofairpollution,accordingtoanewstudypublishedonMonday.”,可知维生素B可以减少造成空气污染的危险物质的影响,而后一句又提到了对健康危害最大的危险物质是PM2.5,故选C。2.Whatcanbelearnedfromthesecondparagraph?A.FurtherstudyabouttheeffectofVitaminBneedstobedone.B.VitaminBisthem
8、ostimportanttohuman’shealth.C.Thetinyparticlesintheair
