BAnewstudyhasfoundnoevidencethatsunscreen,commonlyusedtoreducetheriskofskincancer,actuallyincreasestherisk.ResearchfromtheUniversityofIowabasedtheirfindingsonareviewof18earlierstudiesthatlookedatthe

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　　　Anewstudyhasfoundnoevidencethatsunscreen,commonlyusedtoreducetheriskofskincancer,actuallyincreasestherisk.

　　　ResearchfromtheUniversityofIowabasedtheirfindingsonareviewof18earlierstudiesthatlookedattheassociationbetweensunscreenuseandmelanoma(黑素瘤).Theysaidthattheyfoundflawsinstudiesthathadreportedassociationsbetweensunscreenuseandhigherriskofmelanoma.

　　　Mosthealthexpertsbelievethatbyprotectingtheskinfromtheharmfuleffectsofthesun,sunscreenhelpspreventskincancer,whichisincreasinginincidence(发生率)fasterthananyothercancerintheUnitedStates.

　　　Butquestionshavebeenraisedaboutsunscreenandwhetheritmayhavetheoppositeeffectbyallowingpeopletoremainexposedtothesunlongerwithoutburning.

　　　Theresearcherssaidthatamongtheproblemswithsomeearlierstudiesisthattheyoftenfailedtotakeintoaccountthatthosepeoplemostatriskforskincancer---aremorelikelytousesunscreen.Asaresult,itmayappearthatsunscreenusersgetcancermoreoften.

　　　Thestudies,whichgenerallyreliedonvolunteerstorecalltheirsunscreenuse,werealsounabletoprovehowwelltheproductshadbeenapplied,saidthenewstudy.

　　60．Theunderlinedword“flaws”inthe2ndparagraphmostprobablymeans_________.

　　A．evidences B．facts C．faults D．failures

　　61．Peoplewithfairskinandfreckles________.

　　A．seldomusesunscreen B．aremoreindangerofskincancer

　　C．canbefreefromtheharmofthesun D．oftenexposethemselvestothesun

　　62．Wecanlearnfromthepassagethat_________.

　　A．sunscreenusersgetskincancermoreoften

　　B．thevolunteershaveprovedtheeffectofthesunscreen

　　C．thenewstudyhasbasedontheexperiencesofvolunteers

　　D．thenumberofskincancerpatientsisincreasinginAmerica

　　63．Whichofthefollowingisthebesttitleofthepassage?

　　A．SunscreentoPreventSkinCancer　 B．SunscreentoIncreaseSkinCancer