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1、5-secondrule:what’sthetruth?阅读理解答案 5-secondrule:what’sthetruth? Almosteveryonehasdroppedsomefoodonthefloorandstillwantedtoeatit.Ifsomeonesawyoudropit,heorshemighthaveshouted,“5-secondrule!”Thisso-calledrulesaysfoodisOKtoeatifyoupickitupinfivesecondsorless.Butisthattrue? Profe
2、ssorAnthonyHiltonfromAshtonUniversity,UK,testedtherulewithhisstudents.Theyfoundthatfooddroppedforfivesecondsislesslikelytocontainbacteria(细菌)thanifitsitsthereforlonger. Forthestudy,Hiltonandhisstudentstestedalotoffood—bread,pasta,cookiesandcandy—toseehowmuchbacteriatheyhadwhent
3、heymadecontactwiththefloor.Theyallowedthefoodtolieonvarioustypesofflooring-carpet,laminate(复合地板),andtile(瓷砖)forthreesecondsto30seconds. Notsurprisingly,thelongerthefoodwasonthefloor,themorebacteriaithad.Andthetypeoffloorwherethedroppedfoodlandedhadaneffect.Bacteriaareleastlikel
4、ytotransferfromcarpet,whilethey’remostlikelytotransferfromlaminateortiledsurfacesaftermorethanfiveseconds. Thestudyalsofoundthatthewetterthefood,themorelikelyitwastopickupbacteria.Althoughmostpeoplearehappytofollowthe5-secondrule,eatingfooddroppedonthefloorstillcarriedaninfecti
5、on(感染)risk.“Itverymuchdependsonwhichbacteriaareontheflooratthetime,”HiltontoldForbes. isthe“5-secondrule”about? A.Peopleoftenshoutatsomeonewhentheydropfoodonthefloor. B.Foodissafewhenyoupickupoffthefloorinlessthanfiveseconds. C.It’sbettertoeatdroppedfoodwhenit’sbeenonthefloo
6、rforoverfiveseconds. D.Foodwillgobadwhendroppedonthefloorinfivesecondorless. ’stestwantedtofindout________. A.ifthe“5-secondrule”istrueB.thestudents’favouritefood C.whichfoodiseasilydroppedD.ifdifferenttypesoffloorhavedifferentbacteria tothetest,welearnthefollowingEXCEPT___
7、_____. A.thedroppedfoodhadmorebacteriaifitsatonthefloorforlonger B.thedroppedfoodoncarpethadtheleastbacteria C.bacteriawasimpossibletotransferfromlaminateortiedsurfaces D.thewetterfoodwasmorelikelytopickupbacteria tothearticle,theinfectionriskofthedroppedfooddoesNOTdependon
8、_______. A.howlongthefoodsitsonthefloorB.whatt
