摘要: (教师收集一些有关污染的图片.让学生描述图片中的污染属于哪一种.然后学生分组讨论污染所带来的影响.做一个有关不同的污染及其所带来危害的板报.) T: Look at these pictures, and discuss in groups about different kinds of pollution and the harm caused by them. Then make a wall newspaper.

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