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1 蒸腾作用的概念 课前布置学生预习课本蒸腾作用第二段。并布置学生各做两个家庭小实验。 (1)用透明的塑料地膜做成小袋子(有现成的小糖果袋只要透明即可)紧系在阔叶植物的叶柄茎部(在花卉上做也可),阴雨天可置强烈
1 The concept of transpiration Prepare students to prepend the second paragraph of the transpiration of the textbook. And arrange students to do two small experiments for each family. (1) Made of transparent plastic mulch made of small bags (with ready-made small candy bags as long as the transparent can be) tightly in the petiole stem of broad-leaved plants (doing on flowers can also be), rainy days can be strong