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题干：ForanincreasingnumberofstudentsatAmericanuniversities,Oldissuddenlyin.Thereasonisobvious：thegrayingofAmericameansjobs.Coupledwiththeagingofthebaby-boom(生育高峰)generation，alongerlifespanmeansthatthenation’selderlypopulationisboundtoexpandsignificantlyoverthenext50years.By2050，25percentofallAmericanswillbeolderthan65，upfrom14percentin1995.Thechangeposesprofoundquestionsforgovernmentandsociety,ofcourse.Butitalsocreatescareeropportunitiesinmedicineandhealthprofessions,andinlawandbusinessaswell.“Inadditiontothedoctors,we’regoingtoneedmoresociologists,biologists,urbanplannersandspecializedlawyers，”saysProfessorEdwardSchneideroftheUniversityofSouthernCalifornia's(USC)SchoolofGerontology(老年学）.Lawyerscanspecializein“elderlaw”，whichcoverseverythingfromtrustsandestatestonursing-homeabuseandagediscrimination(歧视）.Businessmenseehugeopportunitiesintheeldermarketbecausethebabyboomers，74millionstrong，arelikelytobethewealthiestgroupofretireesinhumanhistory.”Anystudentwhocombinesanexpertknowledgeingerontologywith,say,anMBAorlawdegreewillhavealicensetoprintmoney，”oneprofessorsays.MargariteSantosisa21-year-oldsenioratUSC.Shebegancollegeasabiologymajorbutfoundshewas”reallyboredwithbacteria”.Soshetookaclassingerontologyanddiscoveredthatshelikedit.Shesays,“Ididvolunteerworkinretirementhomesanditwasverysatisfying.”
题目：It can be seen from the passage that the expansion of America's elderly population_____.
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