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湘教版美术五上《彩云衣》课件(一)

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湘教版五年级美术 湘教版美术五 湘教版美术五上彩云衣 美术五年级上册彩云衣 湘教版美术五上课件
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单击此处编辑母版标题样式 单击此处编辑母版副标题样式 * * 1 1 7 水里有什么 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 一 水污染 n2 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious n3 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 讨论 水是怎么被污染的呢? n1工业污染 n2农业污染 n3生活污染 n4 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 污染实例 n1950年,在日本水俣湾附近的小渔村中,发现一些猫的 步态不稳,抽筋麻痹,最后自己跳水溺死,当地人称它们 为“自杀猫“。后来又有大批自杀猫、自杀狗出现。此后, 水俣镇发现了一个怪病人,开始时步态不稳,面部呆痴, 进而是耳聋眼瞎,全身麻木,最后精神失常,一会儿酣睡 ,一会儿兴奋异常,身体弯弓,高叫而死。1956年又有 同样病症女孩住院,引起当地熊本大学医院专家注意,开 始调查研究。最后发现原来是当地一个化肥厂(日本氮肥 公司)在生产氯乙烯和醋酸乙烯时,采用成本低的汞催化 剂工艺,把大量的含有有机汞的废水排入水俣湾,使鱼中 毒,而猫、狗和人吃了毒鱼生病而死。因为此病发生在水 俣湾,故叫水俣病,是世界八大公害之一。 n5 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 1 已被污染的水能直接饮用吗? 2 怎样把它们变成干净的水? n6 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 自然水域的水必须经过处理,除去部 分或全部的杂志,才能饮用。把不干净的 水变成干净的水,叫做水的净化。 n7 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 净化的过程 水的净化过程一般包括沉淀 ,过滤,消毒三步。 n8 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 净化装置 n9 In this academic year, I have served as a political subject in three classes at Grade 2. A school year, I have been serious 生活中的应用 自来水厂的净水过程 n10
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