植物细胞吸水是《根对水分的吸收》一节的重点，也是难点。在义务教育初级中学教科书《生物》第一册第三章第三节中，编者设计的是一个演示实验。该实验是：在两个烧杯（甲杯装有清水，乙杯装有盐水）中各放入一个同样大小的萝卜条。过一段时间，看一看甲、乙两个杯里的萝卜条 Water absorption of plant cells is the focus and difficulty of the section “Absorption of Roots to Water”. In the third section of Chapter 3 of the first book of the Compulsory Education Middle School textbook “Biology”, the editor designed a demonstration experiment. The experiment was to put a radish of the same size in two beakers (a cup with clean water and a cup with salt water). After a while, take a look at the radish strips in the two cups A and B