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大小:157.00 KB
页数:16页
时间:2019-03-01
《河南专升本英语阅读理解部分》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、阅读理解第一部分 (一) Therateofpopulationgrowthisfastestinunderdevelopedcountries.Inthesecountriesahighbirthrateisaccompaniedbyalowereddeathratethankstoimprovedstandardsofpublichealth.Ideallyitshouldbepossibletocounterbalancetheeffectofareduceddeathratebyanincreaseduseoffamilyplanning.Inpra
2、ctice,however,populationcontrolisacomplexmatter.Throughouthistorypeoplehavedeterminedthesizeoftheirfamiliesaccordingtotheculturalvaluesoftheirsocieties. Populationcontrolhaslongbeenasubjectofdiscussionamongresearchers.Somehavearguedthatthesupplyofgoodlandislimited.Inordertofeedalarg
3、epopulation,badlandmustbecultivatedandthegoodlandoverworked.Asaresult,eachpersonproduceslessinagivenamountoftimeandthismeansaloweraverageincomethancouldbeobtainedwithasmallerpopulation.Otherresearchershavearguedthatalargepopulationgivesmorescopeforthedevelopmentoffacilitiessuchasspor
4、ts,roadsandrailways,whicharenotlikelytobebuiltunlessthereisabigdemandtojustifythem.Similarly,itcanbearguedthatthepubliccostsofsocietywillnotbesoheavytoeachindividualiftheyaresharedamongthemembersofalargepopulation. Oneofthedifficultiesinimplementingbirthcontrolliesinthefactthattheof
5、ficialattitudestopopulationgrowthvaryfromcountrytocountry.Inunderdevelopedcountrieswherealargepopulationispressingharduponthelimitsoffood,spaceandnaturalresources,itwillbethefirstconcernofgovernmenttoplacealimitonthebirthrate.Inawelldevelopedsocietytheproblemmaybemorecomplex.Adeclin
6、ingbirthratemayleadtounemploymentbecauseitresultsinashrinkingmarket.Citieswithadecliningpopulationmayhavetofacetheprospectofashrinkingtaxbaseandafallinlandvalues.Iftherearefewerchildrengoingtoschool,teachersmaybethrownoutofwork.Whenthepressureofpopulationonhousingdeclines,pricesalsod
7、eclineandthebuildingindustryisweakened.Facedwithconsiderationssuchasthese,thegovernmentofadevelopedcountrymaywellprefertoseeaslowlyincreasingpopulation,ratherthanonewhichisstableorindecline. 人口增长速度最快的是在欠发达国家。在这些高出生率降低死亡率由1由于公众健康水平提高伴随着国家。理想情况下应该可以对付由计划生育增加使用平衡降低死亡率的效果。然而在实践中,人口控制是一个
8、复杂的问题。纵观历史的人
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