在实驗课中通常感到困难的是材料問題,其次是因受地区季节限制,往往在介紹的經驗中不适于其他地区。因之会严重的影响教学的进行,甚至会引起部分学生对課堂传授的知識发生怀疑。为了避免这种傾向;切合实际选择材料作好实驗,是非常重要的。茲将在做实驗中所获得的結果介紹如下: 一、观察导管的材料和方法课本上和在我們工作中对导管实驗,往往限于用 Often the material problems are the most troublesome in the experimental class, followed by seasonal seasons, often unsuitable for other regions in the experience presented. This will seriously affect the teaching process and may even cause some students to doubt their knowledge in the classroom. In order to avoid this tendency, it is very important to experiment with the practical choice of materials. The results obtained in doing experiments are described below: I. Materials and Methods for Observing Catheters Catheter experiments on textbooks and in our work are often limited to the use of