完成“光合作用”一节教学内容的关键是高质量的完成实验教学任务。但由于教材内容的安排与季节不符,造成完成实验教学任务存在着下列几个制约因素。①实验材料的制约:讲述本节内容时,正值寒冬,绝大多数植物无叶可取。而“绿叶在光下制造淀粉”和“光合作用吸收二氧化碳”两个 The key to completing the teaching content of “photosynthesis” is to finish the experimental teaching task with high quality. However, due to the inconsistent arrangement of the content of the teaching materials and the seasons, there are several constraints to the completion of experimental teaching tasks. 1 Constraints of experimental materials: When it comes to the content of this section, it is winter, and most plants have no leaves. And “green leaves produce starch under light” and “photosynthesis absorbs carbon dioxide”