叶是绿色植物的重要内容。叶的生理功能对植物本身、对自然界及人类有重要意义。因此,有机物的制造、分解利用的教学内容在全书中占有重要的位置。在教学中对这部分内容应从以下几个方面入手。一、明确教学的基本要求要使学生获得叶的光合作用、呼吸作用的基础知识,了解这些知识对农业、工业和人类生活中的意义,应注意培养学生的观察、制作实验的技能和方法。为完成上述教学的内容, Leaves are an important part of green plants. The physiological function of leaves is of great importance to the plant itself and to nature and humans. Therefore, the production of organic matter, decomposition of teaching content occupy an important position in the book. In teaching this part of the content should be from the following aspects. First, the basic requirements of a clear teaching To enable students to get the basic knowledge of leaf photosynthesis, respiration, understanding of these knowledge on agriculture, industry and human life, we should pay attention to cultivate students’ observation, production experiment skills and methods. To complete the above teaching content,