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我将用芹菜梗来展示植物是如何吸收和传播水源污染的。首先,在一个玻璃罐中装半杯水,滴入蓝色的食用色素。我们可以把这种色素当作人们平常使用的杀虫剂。假设这些杀虫剂不小心混到了池塘中。将少许泥土倒进玻璃罐里搅拌。我们就把这些泥土看作人们野餐时扔进池塘里的烟灰。选一根颜色鲜亮并带有叶子的芹菜,切掉芹菜的底部。我们可以把这根芹菜想像成生长在池塘边的大树。现在将芹菜的茎部放进玻璃罐中,露出叶子的部分。过了一个晚上,我从玻璃罐里拿出芹菜,发现芹菜上面的叶子还
I will use celery stems to show how plants absorb and spread water pollution. First, install half a glass of water in a glass jar and drop into the blue food coloring. We can treat this pigment as a pesticide commonly used. Suppose these insecticides are accidentally mixed in ponds. Pour a little soil into a glass jar and stir. We consider these soils as soot thrown into the pond when people picnic. Pick a brightly colored celery with leaves and cut off the bottom of the celery. We can think of this celery as a tree growing by the pond. Now put the celery stem into the glass jar, revealing the part of the leaf. After a night, I took celery out of the glass jars and found the leaves above the celery