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chinese hairstyle (2023-12-19 13:05:51)
上美的四大发明连环画是经典之作。画的非常好!!中国古代四大发明2007年,英国《独立报》评出了改变世界的101个发明。中国的四大发明:造纸术、印刷术、指南针、@及另一发明算盘赫然在列。本文着重介绍中国古代四大发明。造纸术 西汉初年我国发明了造纸术。1986年,甘肃天水放马滩出土的汉景帝时的纸,是迄今所知最早的纸。公元105年,东汉蔡伦改进了造纸术,称“蔡侯纸”。造纸术是书写材料的一次伟大革命。 蔡伦字敬仲,桂阳人也。……伦有才学,尽心敦慎,数犯严颜,匡弼得失。……伦乃造意,用树肤、麻头及敝布、鱼网以为纸。元兴元年奏上之,帝善其能,自是莫不从用焉,故天下咸称“蔡侯纸” ──《后汉书·蔡伦传》印刷术隋唐时出现了雕版印刷。868年印制的《金刚经》是世界上现存最早的雕版印刷品。11世纪初,北宋平民毕升发明活字印刷术,比欧洲发明早四个多世纪。东传朝鲜、日本,西传埃及、欧洲,印刷术的发明,对人类文化的传播和保存,是一个重大贡献。宋元时期,我国已有套色印刷技术。山西应县木塔内,发现了辽代
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