一、问题导入,激发兴趣师:同学们你们都坐过汽车吗?生:坐过。师:请同学们回忆一下,我们坐在行驶的汽车里观察车外的景物,曾经发现过什么现象呢?生:我发现道路两旁的树都在往后退。生:老师,我不仅发现树往后退,我还发现公路边的房子也在往后退。生:我发现地面上原来不动的物体都 First, the problem is imported, to stimulate interest Teacher: Students have you all been in the car? Health: Sit. Teacher: Please remind the students, we are sitting in the car driving outside the observation of the scene, have found any phenomenon? Health: I found the trees on both sides of the road are back. Health: teacher, I not only found the tree back, I also found that the roadside house is also back. Health: I found the original objects on the ground are not moving