705 中国历史上唯一的女皇帝武则天退位
1799 和珅被嘉庆帝赐自尽
1819 西班牙与美国签订条约，以500万美元的价格将佛罗里达割让给美国
1997 在第一只成年体细胞成功克隆的绵羊多利出生七个月后，英国罗斯林研究所证实对外公布这项成果
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