提问，是课堂教学中常用的教学手段，教师通过提问，可随时了解学生的学习情况和对课程内容的理解程度，借以相应调整教学计划，更好地完成教学任务。好的提问应避“直”，而是问在此而意在彼，也就是不从概念和定义直接提问，而是着眼于教学实际，问题灵活新鲜，问得具体生动? Questioning is a commonly used teaching method in classroom teaching. Through questioning, teachers can keep abreast of the students' learning situation and understanding of the curriculum content so as to adjust the teaching plan accordingly and accomplish the teaching tasks better. Good questions should be avoided “straight”, but rather in this meaning, that is, not from the concept and definition of direct questions, but rather focus on teaching practice, the problem is flexible and fresh, ask the concrete and vivid?