一、优选问点，问在知识关键处教师课堂提问，要力戒提问的随意性。一般应选在知识的重点和关键处提问，才有价值。如新旧知识的衔接处、转化处，以及容易产生矛盾和疑难的地方。如在讲完“硫酸对皮肤和衣服都有很大的腐蚀性”，向“浓酸的稀释”过渡时，这样提问：“为了... First, ask questions, and ask questions in the teacher’s classroom at the key point of knowledge. Be careful about the arbitrariness of asking questions. Generally speaking, it is worthwhile to ask questions in the key and key areas of knowledge. Such as the convergence of old and new knowledge, transformation, as well as prone to contradictions and problems. If after talking about “sulfuric acid is very corrosive to skin and clothing”, when transitioning to the “dilute of concentrated acid,” ask the question: "For...