在引导学生探究“观察同一瓶里水的水面,我们有什么发现?”这个问题时,感到十分困难,一是学生手持瓶子时稳定性欠佳,给观察水面带来了困难;二是教师的示范、讲解会顾此失彼,影响教学效果。另外,在组织学生讨论“用什么方法可以检测桌子是否放平?”问题时也有难度。为较好地解决 It is very difficult to guide students to explore the question of “What do we find out when we observe the water in the same bottle?” First, when students hold bottles, they have poor stability and bring difficulties to the observation of water. Second, teachers' Demonstration, explain will ignore this, affect the teaching effectiveness. In addition, there are difficulties in organizing students to discuss the question of “what can be done to detect if the table is flat?” For a better solution