《中学化学教学大纲》(试行草案)指出“加强实验教学是提高教学质量的重要一环。”要求教师“努力完成规定的实验。”为了提高实验教学的质量,教师对每个实验应作深入研究,我在教学实践中,对现行课本中的一部分实验作了改进和补充。这些实验装置简 The “Secondary Chemistry Syllabus” (protocol draft) pointed out that “strengthening experimental teaching is an important part of improving teaching quality.” Teachers are required to “work hard to complete the prescribed experiments.” In order to improve the quality of experimental teaching, teachers should deepen each experiment. In my research, I improved and supplemented some of the experiments in the current textbooks. These experimental devices