【EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifeexpectancy(寿命)byalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.Theresearch】
EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifeexpectancy(寿命)byalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.
Theresearchshowsthatasedentary（久坐的）lifestyleisasbadforhealthassmokingandobesitybecauseofthedangerscausedbyinactivityandthegreateropportunitiesitoffersforunhealthyeating.
Theresearcherssetouttocalculatetheoverallrisktolifeexpectancyfromwatchingtelevision.Theirresearchinvolvedmorethan11000peopleovertheageof25.
WritingintheBritishJournalofSportsMedicinetheyconcluded"TVviewingtimemaybeconnectedwithalossoflifewhichissimilartoothermajorchronicdiseaseriskfactorssuchasphysicalinactivityandobesity."
TheresearchersfromtheUniversityofQueenslandusedinformationfromtheAustralianDiabetesObesityandLifestyleStudytogetherwithpopulationanddeathratedata.
Buttheysaid:"AlthoughweusedAustraliandatatheeffectsinotherindustrializedanddevelopingcountriesarelikelytobesimilarconsideringthelargeamountsoftimespentwatchingTVandsimilaritiesindiseasepatterns."IntheUnitedKingdomtheaverageamountoftimespentwatchingTVisfourhoursadaycomparedwithfivehoursintheUnitedStates.
Earlierthisyearaseparatestudysuggestedtheriskofdevelopingdiabetesandheartdiseaseordyingearlyrisesbyasmuchas20percentafterjusttwohoursadayinfrontofthebox.
England'sChiefMedicalOfficerSallyDaviessaid:"Physicalactivityoffershugebenefitsandthesestudiesbackwhatwealreadyknow—thatasedentarylifestylecarriesadditionalrisks.Wehopethesestudieswillhelpmorepeoplerealizethattherearemanywaystogetexercise."
67.Wecanlearnfromthepassagethat .
A.whetheryouwatchTVornothasnothingtodowithhowlongyouwilllive
B.ifanadultwatchesTVforsixhourseverydayhewilldiefiveyearsearlier
C.physicalinactivityandobesitywon'tshortenyourlife
D.asedentarylifestyleoffershugebenefits.
68.Thepassageimpliesthat_______.
A.ThelongeronewatchesTVeveryday