一、新课导入师 :我们都知道大多数的花、草、树木等植物都生长在土壤里 ,那么植物为什么生长在土壤里？土壤里究竟有什么呢？上一节课我们带着这两个问题对土壤进行了考察。现在我把大家考察土壤的录像放给你们看看 ,边看边回忆你们是怎么考察的。二、学习新课１ 汇报、交流考 First, the new class into division: We all know that most of the flowers, grass, trees and other plants are growing in the soil, so why plants grow in the soil? What exactly is in the soil? In the previous lesson, we investigated the soil with these two questions. Now I will give you a look at the video of the soil survey and look at how you examine it. Second, learning a new lesson 1 report, exchange test