“情景串”问题教学法能激发学生学习兴趣,理解概念内涵;启发学生思考归纳,实现概念转变;提升学生创新能力,优化思维品质。 “Scenario string ” problem teaching method can stimulate students ’interest in learning, understand the concept of connotation; inspire students to think induction, to achieve the concept of change; enhance students’ ability to innovate and optimize the quality of thinking.