IntheUnitedStates,30percentofthepeoplehavea“weightproblem”。Tomanypeoplethecauseisobvious(明显的):theyeattoomuch.Butscientificevidence(证据)doeslittletosupportthisidea.GoingbacktoAmericaof1910,we

　　IntheUnitedStates,30percentofthepeoplehavea“weightproblem”。Tomanypeoplethecauseisobvious(明显的):theyeattoomuch.Butscientificevidence(证据)doeslittletosupportthisidea.GoingbacktoAmericaof1910,wefindthatpeoplewerethinnerthantoday,yettheyatemorefood.Inthosedayspeopleworkedharderphysically,walkedmore,usedmachinesmuchless,anddidn’twatchtelevision.

　　Severalmodernstudies,moreover,haveshownthatfatterpeopledon’teatmoreonaveragethanthinnerpeople.A1979studyof3,545Londonofficeworkersshowedthatfatpeopleeatlessthanslim(苗条的)people.

　　Studiesalsoshowthatslimpeoplearemoreactivethanfatpeople.AstudybyaresearchgroupatStanfordUniversityfoundthefollowinginterestingfacts:

　　Themorethemanran,thegreaterlossofthebodyfat

　　Themoretheyran,thegreaterincreaseinfoodintake.

　　Thus,thosewhoranthemostatethemost,yetlostthegreatestamountofbodyfat.

　　小题1:NowadaysmanyAmericanshavetheproblemthat______.A．theyaretooslimB．theyworktoohardC．theyaretoofatD．theylosetoomuchbodyfat小题2:Accordingtothepassage,howmanypeoplein900Americanshavea“weightproblem”?A．150.B．300.C．600.D．270.小题3:Isthereanyscientificevidencetosupporttheideathateatingtoomuchisthecauseofa“weightproblem”?A．Yes,thereisplentyofevidence.B．Ofcourse,thereissomeevidencetosupportthis.C．Thereishardlyanyscientificevidencetosupportthis.D．Wearenotsure.小题4:TheAmericansin1910________. A．atemorefoodandhadmorephysicalactivitiesB．atelessfoodbuthadmorephysicalactivitiesC．atelessfoodandhadlessphysicalactivitiesD．hadmoreproblems