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托福考试阅读材料为了让大家更好的准备托福考试,给大家了托福考试阅读材料下面就和大家分享,来欣赏一下吧HowcleanistheaveragebackyardpoolisFindoutonthisMomentofScience.Everybodylovestheswimmingpool.ButhowcleanisthewaterintheaveragebackyardorpublicpoolIfyoutrust1chlorinetotakecareofgermsyou’reinforasurprise.Chlorineandother2disinfectantsdoindeedhelptocleanthewaterbutsomegermscansurviveineventhebest-keptpool.Forexample3cryptosporidiummayliveinpoolwaterforseveraldays.Cryptocausesa4diarrhealillnessandmay5rinseoffthebodiesofinfectedpeopleor6diaperedchildrenintothepool.Ifyouswallowinfectedpoolwateryoumaybeesick.Othergermsmayliveforafewminutesorafewhoursinachlorinatedpool:Giardia鞭毛虫Shigella志贺氏菌andE.Coli大肠杆菌maycausediarrhealillnesses.PseudomonasAeruginosa绿脓杆菌maycauseanearinfectioncalledswimmer’searandalsoaskininfectioncalled“hottubrash热浴池皮疹”thatisusuallyassociatedw...。