一、精选习题,示范讲解,充分发挥例题的作用例题教学不仅有助于学生理顺解题思路,复习巩固知识和明确解题规范,更重要的是可以培养学生多方面的能力,但由于课堂时空有限,化学习题类型繁多,不可能面面俱到。为此,教师必须对例题进行筛选,精选典型的、具有普遍指导意义的习题作范题,从方法步骤着眼,从 First, the selection of exercises, demonstrations to explain, give full play to the role of examples of examples of teaching not only helps students streamline the problem-solving ideas, review and consolidate knowledge and clear problem-solving norms, more importantly, can cultivate students’ ability in many aspects, but due to Classroom space is limited and there are many types of chemistry problems that cannot be exhaustive. To this end, teachers must screen examples, select typical, general-guiding exercises, and follow the method steps.