古人云:学起于思,思源于疑。教学过程就是不断解决问题的过程,从而启发学生思考,提高学生能力。美国教学法专家斯特林·G﹒卡尔汉认为:“提问是教师促进学生思维、评价教学效果以及推动学生实现预期目标的基本控制手段。”因此在教学过程中,教师要努力提出能激发学生兴趣、启发学生思维的问题,这也是中学化学新课标的要求,中学化学新课标要求突显学生的主体地位,引导学生自主、探究、合作,要引导学生自主探究最好的途 The ancients said: learning from thinking, from the suspect. The teaching process is the process of solving problems constantly, so as to inspire students to think and improve their abilities. American pedagogical expert Stirling G. According to Kahnham, “Questioning is a basic control measure for teachers to promote students’ thinking, evaluate teaching effectiveness and promote students’ achievement of expected goals.” Therefore, in the process of teaching, teachers should make efforts to put forward questions that can stimulate students’ interest and inspire their thinking. This is also a requirement for the new curriculum standard of chemistry in middle school. The requirements of the new curriculum standard for chemistry in middle school should emphasize the dominant position of students and guide students to autonomy, exploration and cooperation, and guide students to explore the best way autonomously