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第四 课 拓展

第四 课 拓展. 思 考：节能马桶除了水能节约外，还可以有哪些节能处理 ？. 1 、 管道冲力的设计. 2 、 出水口设计. 3 、 喷水孔设计. 看一看. 谈一谈. 你怎样做好节能小卫士？.

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第四 课 拓展

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  1. 第四课 拓展

  2. 思 考：节能马桶除了水能节约外，还可以有哪些节能处理？ 1、 管道冲力的设计 2、 出水口设计 3、 喷水孔设计

  3. 看一看

  4. 谈一谈 你怎样做好节能小卫士？

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