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  BAnewstudyhasfoundnoevidencethatsunscreen,commonlyusedtoreducetheriskofskincancer,actuallyincreasestherisk.ResearchfromtheUniversityofIowabasedtheirfindingsonareviewof18earlierstudiesthatlookedatthe

  B

   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

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2020-12-2621:58
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姜广田

  60--63 CBDA

  略

2020-12-26 22:02:36
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