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师:同学们,你觉得现在周围的环境舒服吗?生:很舒服。师:为什么呢?生:因为这里比外面安静。生:还因为空气很清新。师:同学们觉得这里的环境很舒适,那么池塘又是一个什么样的环境呢?请同学们现在打开书本第48页的池塘剖面图(教师用投影仪出示池塘剖面图),看看池塘里有
Teacher: Classmates, do you think the surroundings are comfortable right now? Teacher: Why? Health: Because it is quieter than outside. Health: but also because the air is fresh. Teacher: Students think the environment here is very comfortable. What kind of environment is the pond then? Students are now invited to open the pond section of the book on page 48 (teachers use the projector to produce a section of the pond) and look at the pond Have