初中物理课本对连通器原理是这样讲述的:设想在连通器下部正中有一个小液片。如果液体不流动,两边液柱对液片的压强相等。因而连通器内盛同种液体时,各容器液面相平。然而学生对“液片”总感到难以理解。笔者在教学中运用实验演示“液片”模型,使学生理解连通器原理收到了较好的效果。具体做法是:取一U形玻璃管作连通 The physics textbook for junior middle school tells the principle of the communicator: imagine that there is a small fluid in the middle of the lower part of the communicator. If the liquid does not flow, the liquid pressure on both sides of the liquid column is equal. Therefore, when the same kind of liquid is contained in the communicating device, the liquid level of each container is flat. However, students always find it difficult to understand “liquid tablets.” The author uses experiments to demonstrate the “liquid film” model in the teaching, so that students understand the principle of the connected device has received good results. The specific approach is: take a U-shaped glass tube for connectivity