在初始阶段,当学生还未养成质疑习惯或者由于所学知识较难而无法下手时,老师可以先精心设计好问题,引导学生效仿老师提问。提问的内容要由浅入深,由易到难,可以从一个概念、一条性质、一个公式或者一道计算题入手。经过长期训练,学生在教师的引导下就能从“无疑”到“有疑”, In the initial stage, when the student has not yet developed the habit of questioning or can not get started because of the difficult knowledge, the teacher can carefully design the problem and guide the student to follow the teacher's question. The content of the question should be from shallow to deep, from easy to difficult, from a concept, a nature, a formula or a calculation to start. After long-term training, students under the guidance of teachers can from “no doubt” to “doubtful”