![Americaisgrowingolder.Fifty-eightyearsago,only4outofeve...]( "Americaisgrowingolder.Fifty-eightyearsago,only4outofeve...")
- 问题详情：Americaisgrowingolder.Fifty-eightyearsago,only4outofevery100peopleintheUnitedStateswere65orolder.Today,10outofevery100Americansareover65.TheagingofthepopulationwillaffectAmericansocietyinmanyways—education,medicine,andbusiness.Quietly,thegra...
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