绿色植物的水分代谢是指水分吸收、运输、利用和散失。渗透吸水的原理是“水分代谢”这节课的教学重点，也是教学难点。为了帮助学生理解、掌握并运用这部分知识，在教学实践中，对“水分代谢”的教学采取以下六方面对策，利用知识迁移理论，引导学生运用比较，归纳、总结的思 Water metabolism of green plants refers to water absorption, transportation, utilization, and loss. The principle of infiltration and water absorption is the teaching emphasis of “moisture metabolism”, which is also a teaching difficulty. In order to help students understand, master and use this part of the knowledge, in the teaching practice, the following six countermeasures are adopted for the teaching of “water metabolism”, using the knowledge transfer theory to guide students to use comparisons, summarize and summarize