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1、精品文档2017年雅思考试阅读模拟题10网络ChangesinAirAAfederalbanonozone-depletingchlorofluorocarbons（CFCs），toconformwiththeCleanAirAct,is,ironically,affecting22.9millionpeopleintheU.S.whosufferfromasthma,Geneticinhaledalbuterol,whichisthemostcommonlyprescribedshort-actingasthmamedica
2、tionandrequiresCFCstopropelitintothelungs,willnolongerbelegallysoldafterDecember31,2008.Physiciansandpatientsarequestioningthewisdomoftheban,whichwillhaveaninsignificanteffectonozonebutameasurableimpactonwallets:thereformulatedbrand-namealternativescanbethreetimesas
3、expensive,raisingthecosttoabout$40perinhaler.Theissueisevenmoredisconcertingconsideringthatasthmadisproportionatelyaffectsthepoorandthataccordingtorecentsurveys,anestimated20percentofasthmapatientsareuninsured.B“Thedecisiontomakethechangewaspolitical,not2016全新精品资料-全
4、新公文范文-全程指导写作–独家原创14/14精品文档medicalorscientific,”sayspharmacistLeslieHendelesoftheUniversityofFlorida,whoco-authoreda2007paperintheNewEnglandJournalofMedicineexplainingthewithdrawalandtransition.In1987CongresssignedontotheMontrealProtocolonSubstancesThatDepletetheOzon
5、eLayer,aninternationaltreatyrequiringthephasingoutofallnonessentialusesofCFCs.Atthattime,medicalinhalerswereconsideredanessentialusebecausenoviablealternativepropellantexisted.In1989pharmaceuticalcompaniesbandedtogetherandeventually,in1996,reformulatedalbuterolwithh
6、ydrofluoroalkane.CThetransitionbeganquietly,butasmorepatientsseetheirprescriptionschangeandcostsgoup,manyquestionwhythisbailmustbeginbeforegenericsbecomeavailable.AtleastonememberoftheFDAadvisorycommittee,NicholasJ.GrossoftheStritch-LoyolaSchoolofMedicine,haspublicl
7、yregrettedthedecision,recantinghissupportandrequestingthatthebanbepushedbackuntil2010,when2016全新精品资料-全新公文范文-全程指导写作–独家原创14/14精品文档thefirstpat上一篇英语：2017年雅思考试阅读模拟题9下一篇英语：没有了查看更多关于雅思模拟题的文章网友同时还浏览了：2017年雅思考试阅读模拟题92017年雅思考试阅读模拟题82017年雅思考试阅读模拟题72017年雅思考试阅读模拟题62017年雅思考试阅读模拟题
8、52017年雅思考试阅读模拟题4网络entexpires.DGrossnotesthatthedecisionhadnothingtodowiththeenvironmentAlbuterolinhalerscontributedlessthan0.1percentofthe
