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题文

读三角形坐标图,若X、Y、Z分别表示某国0~14岁、15~64岁、65岁及以上三个年龄段人数所占总人口的比重,为实现经济的可持续发展,该国应采取的相应措施是

A.计划生育 B.鼓励生育
C.采取移民政策 D.鼓励人员出国
科目 地理   题型 选择题   难度 中等
知识点: 城市环境问题的成因与治理对策
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