题目内容

根据建国以来我国人口与耕地变化情况分析回答:
 
(1)建国以来我国人口数量呈现什么特点?我国人均耕地变化又有什么特点?
                                                                                                                                                                
(2)我国人口与耕地关系中,存在着怎样突出的问题?产生这一问题的主要原因是什么?
                                                                                                                                                               
                                                                                                                                                                
(3)为了解决上述问题,我国的基本国策是什么?
                                                                                                                                                                
                                                                                                                                                               
(1)人口增长迅速       人均耕地面积迅速减少
(2)人口多,人均耕地少              
         人口增长快,耕地遭受破坏,水土流失,土地沙化面积增加,建筑用地增多等导致耕地减少。
(3)实行计划生育        十分珍惜和合理利用每一寸土地,切实保护耕地
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