在全国大力推行素质教育的今天，实验教学倍受重视，对化学这样一门以实验为基础的学科来说，学生实验对学生的全面发展显得尤为重要．因而实验的危险性与安全性这一矛盾摆到每一位化学教师面前，为了有效地解决这一矛盾，我们注意从危险与安全的辩证关系方面进行教学，收到了? Today, vigorously promoting quality education throughout the country, experimental teaching has received much attention. For chemistry as an experimentally based discipline, student experiments are particularly important for students’ all-round development. Therefore, the contradiction between the danger and safety of the experiment was placed in front of every chemical teacher. In order to effectively resolve this contradiction, we paid attention to the teaching of the dialectical relationship between danger and safety and received it.