3新奇的纳米技术（2018年1月安徽第1次印刷）.ppt

,新奇的纳米技术,自学提示：自由朗读课文，注意读准字音，读通句子。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,我会读,纳米特性造福杀菌除臭碳纳米管结实纳米吸波材料隐形探测雷达波癌症病灶缓释,完成填空：这是一篇（），介绍了（），（），以及（），突出纳米技术的（）。,完成填空：这是一篇（科普说明文），介绍了（什么是纳米技术），（我们身边的纳米技术），以及（未来的纳米技术），突出纳米技术的（神奇）。,纳米是非常非常小的长度度量单位，1纳米等于十亿分之一米。,纳米是非常非常小的长度度量单位，非常非常小。,对比读,纳米是非常非常小的长度度量单位，1纳米等于十亿分之一米。,纳米是非常非常小的长度度量单位，非常非常小。,你觉得上面哪句话写得更明白形象些？为什么？（用了列数字的方法）,对比读,如果把直径为1纳米的小球放到乒乓球上，相当于把乒乓球放在地球上，可见纳米有多么小。,如果把直径为1纳米的小球放到乒乓球上，相当于把乒乓球放在地球上，可见纳米有多么小。课文使用了作比较方法说明纳米的小.,纳米技术：就是研究并利用这些特性造福于人类的一门学问。“下定义”师：下定义，是一种用简洁明确的语言对事物的本质特征作概括的说明方法。,自学提示：浏览第三自然段，想想课文使用了_说明方法，说明了纳米技术的应用广泛。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,纳米情报站：纳米镀膜是一种汽车镀膜美容，其漆面保护效果十分明显，可以避免车漆氧化，达到漆面增亮、抗酸碱、抗氧化、抗紫外线等多重功效。,美国已研制成功的“自净”玻璃；（这种玻璃的神奇之处全在于它穿上了40纳米厚的二氧化钛“外套”，相当于头发丝粗细的1/1500。）自净玻璃上的纳米膜与太阳光线中的紫外线反应，会产生双重作用：其一是催化作用，即能够使可见光中的远紫外线分解落在玻璃上的有机物，使有机污物化为乌有；其二它能使玻璃表面变成亲水性的，能把雨点或雾气变成一个薄层而使玻璃表面湿润，并洗掉玻璃表面的脏物。通常，这个涂层被光照“充电”5日后，夜间也能工作。