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状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,中国古代四大发明,指南针,火药,造纸术,印刷术,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,10,纸的发明,10 纸的发明,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,自由读课文，疏通生字词。说说这篇课文在结构上是按什么顺序来写的？,初,读,课,文,总,分,总,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,造纸术 伟大 创造 记录 蔡伦 积累,携带 保存 制作 大约 一册书,经验,朝鲜 欧洲 社会 阿拉伯,字,词,积,累,我会读,造纸术 伟大,创,造 记录,蔡伦,积,累,携,带 保,存,制,作 大约 一册书,经验,朝,鲜,欧洲,社,会 阿拉伯,chun,ci ln,li,xi,cn,zh,xin,u zhu,sh,造纸术 伟大 创造 记录 蔡伦 积累 字词积累我会,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,蔡,创,携,伦,鲜,欧,洲,社,存,制,累,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,术,录,册,保,伟,我会写,验,欧,阿,存,社,洲,约,左右结构,独体字,上下结构,半包围结构,术录册保伟我会写验欧阿存社洲约左右结构独体字上下结构半包围结,伟,保,伯,们 便,他 价,伦 作,找一找：本课中还有哪些字是单人旁？,伟们 便找一找：本课中还有哪些字是单人旁？,结构：,部首：,书写指导：,zhu,洲,重难点字书写指导,左右,“,州”第一笔是左点，第二笔为竖撇，中竖短。,氵,结构：部首：书写指导：zhu洲重难点字书写指导左右“州”第,结构：,部首：,书写指导：,c,册,独体字,“”,稍窄些，撇为竖撇；中间一横稍长，在横中线上起笔。,丿,结构：部首：书写指导：c册独体字“”稍窄些，撇为竖撇；,想出新方法、建立新理论、做出新的成绩或东西。（）,形容读书多、学问大。（）,（质料）不精细；不光滑。（）,传授和继承。（）,创造,学富五车,粗糙,传承,想出新方法、建立新理论、做出新的成绩或东西。（）创造,近义词,反义词,发明,_,记录,_,吸收,_,改进,_,发现,记载,吸取,改造,笨重,_,粗糙,_,便宜,_,进步,_,轻便,细腻,昂贵,倒退,近义词反义词发明_记录_吸收_,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,再读课文，把课文划分为三个部分，概括每部分的大意。,概述造纸术的发明的重大意义。,记叙我国发明造纸术的经过。,2,4,1,我国造纸术的传播以及对世界文化的影响。,5,总,分,总,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,造纸术的发明，是中国对世界文明的伟大贡献之一。,课,文,精,讲,不能，如果去掉，就变成唯一，与实际不符，不能体现文章语言的准确性和严密性。,能不能删？,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,读一读,2,4,自然段，在相应的位置上做标记：我国的造纸术发明经历了怎样的过程？,读一读24自然段，在相应的位置上做标记：我国的造纸,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,1.,要记录一件事情，就用刀把文字刻在龟甲和兽骨上，或者把文字铸刻在青铜器上。,造纸方法发明以前：,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,2.,后来，人们又把文字刻在竹片和木片上。这些竹片、木片用绳子穿起来，就成了一册书。,缺点：,笨重，阅读、携带、保存都很不方便。,2.后来，人们又把文字刻在竹片和木片上。这些竹片、木,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,3.,再后来，有了蚕丝织成的帛，就可以在帛上写字了。,优点：,比竹片、木片轻便。,缺点：,价钱太贵，不能普及。,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,人们用蚕茧制作丝绵时发现，盛放蚕茧的篾席上，会留下一层薄片，可用于书写。考古学家发现，在两千多年前的西汉时代，人们已经懂得了用麻来造纸。,西汉时代：,缺点：,麻纸比较粗糙，不便书写。,人们用蚕茧制作丝绵时发现，盛放蚕茧的篾席上，会留下一,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,有个叫蔡伦的人，吸收了人们长期积累的经验，改进了造纸术。他把树皮、麻头、稻草、破布等原料剪碎或切断，浸在水里捣烂成浆；再把浆捞出来晒干，就成了一种既轻便又好用的纸。,东汉时代：,累,累,li,li,（）,（）,li,（）,积累,果实累累,劳累,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,收集原料,剪碎、切断,浸水、捣烂成浆,晾晒成品,收集原料剪碎、切断浸水、捣烂成浆晾晒成品,用这种方法造的纸，原料容易得到，可以大量制造，价格又便宜，能满足多数人的需要，所以这种造纸方法就传承下来了。,蔡伦改进的造纸术有什么,优点,？为什么只有蔡伦改进的造纸术传承下来了？,用这种方法造的纸，原料容易得到，可以大量制造，价格又,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,我国的造纸术首先传到邻近的朝鲜半岛
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