城市环境和城市生态系统是教材中的一个难点,在突破这个难点时,我采用了三幅画,一幅是“自然生态环境”图,一幅是“农村生态环境”图,第三幅是“城市生态环境”图。 在讲城市环境时,首先让学生先看第一幅“自然生态环境”图,通过画面分析它的组成要素及其特点,当学生找到组成的要素只有“阳光、大气、水、土地、生物”等时,要强调一下,这些都是 The urban environment and urban ecosystem are a difficult point in the textbook. When breaking through this difficulty, I used three paintings, one of which is a “natural ecological environment” map and the other is a “rural ecological environment” map. The third is “Urban ecological environment” map. When speaking about the urban environment, first let the students look at the first “natural ecological environment” map, analyze its constituent elements and characteristics through the screen, when the students find the composition of the elements only “sunshine, atmosphere, water, land, and biology” When we wait, we must emphasize that these are