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四大发明的先后顺序
还有啊,指南针不是战国时期就有了吗?怎么不是排在第一位?
人气:434 ℃ 时间:2019-10-06 18:17:32
解答
我国的四大发明是造纸术、印刷术、火药、指南针.造纸术是西汉时发明的,东汉蔡伦改进了造纸术.雕版印刷在隋唐时出现,北宋毕升发明了活字印刷.火药在隋朝时出现,唐末用于军事上.早在战国时出现了用于指示方向的司南.北...
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