大学英语六级阅读训练及答案.docx

大学英语六级阅读训练及答案

第一篇：大学英语六级阅读训练及答案在线学英语体验请申请：洛基英语，中国在线英语教育领导品牌Eatmore,Playmore—WeightLessIntheUnitedStates,20to40percentoftheadultpopulationhasa“weightproblem.”Tomanypeople,thecauseseemsobvious;weeattoomuch.Butscientificevidencedoeslittletosupportthisidea.GoingbacktotheAmericaof1910,wefindthatpeoplewereleanerthantoday,yettheyconsumedmorefood.Inthosedayspeopleworkedharderphysically,walkedmore,usedmachinesmuchless,didn'twatchtelevision.Severalmodernstudies,moreover?haveshownthatfatterpeopledonoteatmoreonaveragethanthinnerpeople.Infact,someinvestigations,suchasa1979studyof3454Londonofficeworkers,revealthat,onbalance,fatpeopleeatlessthanslimmerpeople.Studiesshowthatslimpeoplearemoreactivethanfatpeople.Measurementofcalorieintakeinslim,activepopulationscomparedwithmoderatelyoverweight,inactivegroupsroutinelyshowsstrikingdifferences.AstudybymyresearchgroupatStanfordUniversitySchoolofMedicinefoundthatamongslim,tennis-playingwomen(ages32to45;11hoursperweek)averagedailycalorieintakewas2417,whileamongsedentary(坐着的),moderatelyoverweightwomenofthesameageitwas1490.Herewereslimwomenremainingslimon62percentmorecaloriesthanoverweightwomen.Thecriticaldifference;physicalactivity.InanotherStanfordstudy,48sedentarymenages30to55startedonaone-yearjoggingprogram.Weobservedthesechangesafterthetrainingperiod:Themorethemenran,thegreatertheirlossofbodyfat.Themoretheyran,thegreatertheirincreaseinfoodintake.Thus,thosewhoranthemostatethemost,yetlostthegreatestamountofbodyfat!Ibelievethatthisillustratestheevolutionofmoderatelyoverweightpeopletorelativelysliminpidualsviaaprogressiveprogramofregularexercise.Thecrucialingredientisregular,enjoyableactivity.Useofenergy(calories)bythebodyfallsintotwocategories.Thefirstisenergyusedforessentialbodilyfunctions—digestion,heartbeat,breathing—andisknownasthebasalmetabolicrate,orBMR.Inanaverage-sizedadult,BMRrequiresabout1400caloriesperday.在线学英语体验请申请：Thesecondcategoryisenergyusedforphysicalactivity—standing,walkingandallothermovements.TogetherwiththeBMR,itmakesu