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  TheAmericanbabyboomafterthewarmadeunconvincingU.S.advicetopoorcountriesthattheylimittheirbirths.Howevertherehashardlybeenayearsince1957inwhichbirthratesdidnotfallintheUnitedStatesandotherrichcountri

  TheAmericanbabyboomafterthewarmadeunconvincingU.S.advicetopoorcountriesthattheylimittheirbirths.Howevertherehashardlybeenayearsince1957inwhichbirthratesdidnotfallintheUnitedStatesandotherrichcountriesandin1976thefallwasespeciallysharp.BothEastGermanyandWestGermanyhavefewerbirthsthantheyhavedeathsandtheUnitedStatesisonlytemporarilyabletoavoidthisconditionbecausethechildrenofthebabyboomarenowanexceptionallylargegroupofmarriedcouples.

  ItistruethatAmericansdonottypicallyplantheirbirthstosetanexamplefordevelopingnations.Wearemoreaffectedbywomen'sliberation:oncewomenseeinterestingandwell-paidjobsascareersavailabletheyarelesswillingtoprovidefreelaborforchildraising.Fromcostingnothingchildrensuddenlycometoseemimpossiblyexpensive.Andtothehighcostofchildrenareaddedtheuncertaintiesintroducedbydivorce;couplesareincreasingtosubjectchildrentotheterribleexperienceofmarriagebreakdownandthemselvestothedifficultyofraisingachildalone.

  Thesecircumstances-womenworkingoutsidethehomeandtheinstabilityofmarriagetrendtospreadwithindustrialsocietyandtheywillaffectmoreandmorecountriesduringtheremainderofthiscentury.AlongwiththemgoessocialmobilityambitiontoriseintheurbanworldamainfactorinbringingdownthebirthsinEuropeinthe19thcentury.

  Foodshortagewillhappenagainwhenthereservesresultingfromthegoodharvestsof1976and1977havebeenconsumed.Urbanizationislikelytocontinuewiththecitiesofthedevelopingnationsstrugglingundertheweightoftwicetheirpresentpopulationsbytheyear2000.Thepresentlyrichcountriesareapproachingastablepopulationlargelybecauseofthechangedplaceofwomenandtheyincidentallyaresettinganexampleofrestrainttotherestoftheworld.Industrialsocietywillspreadtothepoorcountriesandambitionwillexceedresources.Allthiswillleadtoapopulationinthe21stcenturythatissmallerthanthatwasfeared afewyearsago.Forthoseanxioustoseeworldpopulationbroughtundercontrolthenewsisencouraging.

  49.Duringtheyearsfrom1957to1976thebirthrateoftheUnitedStates_____.

  A.increased

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2019-06-04 13:50
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曹锦云

  BBABD

2019-06-04 13:52:38

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