我们校园里有三棵榔榆树,据老师们介绍,它们在校园里默默地生长了十余年。我们环保小队的同学在观察校园植物时,发现榔榆树上有两种完全不同形状的叶子,觉得非常奇怪,怎么一棵树上会有两种完全不同的叶呢?我们学习过各种各样的叶,知道一棵树上找不到两片完全相同的叶。但这两种 There are three elm trees in our school. According to the teachers, they grew silently for more than ten years on the campus. When observing the campus plants, students from our environmental protection team found that there are two completely different shapes of leaves on the palm elm trees. It is very strange. How can we find two totally different leaves on a tree? We have studied various ways The leaves, knowing that one tree can not find two identical leaves. But both