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玩一玩我们身边的纸

纸. 玩一玩我们身边的纸. 生活中你见过哪些纸？ 它们有什么用途？. 1. 2. 牛皮纸. 餐巾纸. 3. 4. 打印纸. 报纸. 我发现：吸水性最强的纸是（ ）纸；最弱的是（ ）纸。. 餐巾纸. 牛皮纸. 观察纸. 纸与能源：. 　　一箱 A4 复印纸需要一棵成年大树做原材料，一个经营规模不大的经销商每年要销 7000 箱左右，一年就相当于毁掉了一大片成年树林。

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玩一玩我们身边的纸

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  1. 纸

  2. 玩一玩我们身边的纸

  3. 生活中你见过哪些纸？ 它们有什么用途？

  4. 1 2 牛皮纸 餐巾纸 3 4 打印纸 报纸

  5. 我发现：吸水性最强的纸是（ ）纸；最弱的是（ ）纸。 餐巾纸 牛皮纸

  6. 观察纸

  7. 纸与能源： 　　一箱A4复印纸需要一棵成年大树做原材料，一个经营规模不大的经销商每年要销7000箱左右，一年就相当于毁掉了一大片成年树林。 平均来说，我国造纸工业每生产一吨纸，需耗用水100吨，而国外纸厂每吨纸仅耗用水10－20吨，甚至有低于10吨。另外，我国人均供水占有量仅为世界平均水平的四分之一，位居世界第58位。 节 约 纸 张 就 是 节 约 能 源 ！

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