我们在开学前做了一个养蛙器,飼养了几只青蛙。有意識的观察适应生活环境的情况,經过多次实驗,証明青蛙的皮色是随着生活环境的变化而变化。做法:首先在养蛙器中放些綠色植物,几乎把水盆全盖上了,經过五、六天的时间,青蛙皮膚逐漸变成綠色的颜色。(圖1)其次除去緣草,在水盆的周圍 We did a frogger before the start of the school, raising a few frogs. Conscious observation of adaptation to the circumstances of the living environment, after many experiments, that the skin color of frogs is changing with the changing living environment. Practices: First put some green plants in the frog, almost full basin, after five or six days, the frog skin gradually turns green color. (Figure 1) Followed by the removal of edge grass, around the basin