微量元素在生物体内含量极低,但对生物体的正常生长、发育和繁殖有着极其重要的作用。在生物学教学中可以巧用一些“微量元素”来调动学生学习的积极性、主动性,唤醒学生内在的学习原动力,激发学生学习生物学的兴趣,提高课堂教学效率。 Trace elements in the body content is extremely low, but the organism’s normal growth, development and reproduction has an extremely important role. In biology teaching, some “trace elements” can be used to arouse the enthusiasm and initiative of students to arouse students’ motivation to learn, to stimulate their interest in learning biology and to improve the efficiency of classroom teaching.