九年义务教育初中化学教材图文并茂，具有较强的可读性、可视性。教师在教学中往往调动各种手段创设情境，特别是实验的手段、多媒体教学设备、社会实践等形式多侧面多角度地来激发学生的兴趣和求知欲，以利学生主动、生动地学习。相比之下，在化学题（问题、练习题、试题等） Nine-year compulsory education junior high school chemistry textbooks are illustrated and have strong readability and visibility. Teachers in teaching often mobilize various means to create situations, especially experimental methods, multimedia teaching equipment, social practice and other forms to stimulate students’ interest and curiosity from various angles, so as to facilitate students to actively and vividly learn. In contrast, in chemistry (questions, exercises, test questions, etc.)