人口这事现在很难拿，主要是各个年龄段的人口分布吧，老龄化对社会的负担太重

来源: 一笑拉于 2025-02-17 08:30:49 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.