the arm bones of women who lived 7-000 years ago show阅读理解答案

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1、Thearmbonesofwomenwholived7-000yearsagoshow阅读理解答案　　Thearmbonesofwomenwholived7-000yearsagoshowasurprisinglevelofstrength-evenhigherthantoday’sprofessionalathletes.That’saccordingtoafirst-everstudycomparingprehistoric(史前的)bonestothoseoflivingpeople.Thefindingsuggestsarevisionofhistor

2、y—theeverydaylivesofprehistoricwomenwerefilledwithhardlabor,ratherthanjustsittingathomedoinglightertaskswhilethemenstruggledandfoughtforlife.　　Beforethestudy,therearenoclearrecordsdescribinghowourancientancestorslived.Itcanbeeasytoforgetthatboneisalivingtissue,onethatrespondstothedi

3、fficultiesweputourbodiesthrough，”saidleadauthorAlisonMacintosh.“Physicalforceandmuscleactivitybothputpressureonthebone.Thebonereactsbychanginginshape,thicknessandotheraspectsovertime.”　　Previousstudiesonlycomparedfemalebonestocontemporarymalebones,theresearcherssaid—andthat’saproble

4、m,becausetheresponseofmalebonestostressandchangeismuchbiggerthanthatofwomen.Forinstance，ashumansmovedfromahunter-gathererlifestyleconstantlyonthemovetoamoresettledagrarian(农耕的)one,changescanbeobservedinthestructureoftheshinbone(胫骨)一andthesechangesweremuchmoreevidentinmen.　　However,a

5、comparisonofthebonesofprehistoricwomentothebonosoflivingfemaleathletescanhelpusworkoutamoreaccuratepictureofwhatthoseprehistoricwomenweredoing.“Byanalyzingthebonesoflivingpeopleandcomparingthemtotheancienthones,wecanstarttoexplainthekindsoflaborourancestorswereperforming,”Macintoshs

6、aid.Whattheyfoundwasthatwomen’slegstrengthhasn’tchangedagreatdeal,buttheirarmsusedtobeverypowerful.Prehistoricwomen,theresearchersfound,hadarmstrength11?16percentstrongerthanthoseofmodernrowers,and30percentstrongerthanthoseofnon-athletes.　　28.Whatdoesthestudytellaboutprehistoricwome

7、n?　　A.Theywerestrongerthanmen.　　B.Theyhadlighterbonesthanmen.　　C.Theydidtoughtasksasthemen.　　D.Theyspentmosttimestayingathome.　　29.Whatproblemdidpreviousstudiesonprehistoricboneshave?　　A.Theylackedenoughcomparison.　　B.Theyonlystudiedmen’sbones.　　C.Theyfocusedlittleonbones.　　D.Theyig

8、noredthelifestyles.