凭借一些年来的教学反馈和积累,本人认为画“直观简图”在生物的解题中有独到作用,以下就几个方面结合典例和大家一起探讨。一、明了抽象复杂的物质穿膜典例1、O2从人的肺泡中至少要穿过多少层磷脂分子才能达到大脑组织细胞利用() With some years of teaching feedback and accumulation, I think painting “intuitive sketch ” in the biological problem solving has a unique role, the following combination of several examples with you to explore. First, understand the abstract and complex material through the membrane Example 1, O2 from the human alveolar how many layers through the phospholipid molecules can reach the brain tissue cells ()