锦秋御尚房价:¡¡translate!!

来源:百度文库 编辑:高考问答 时间:2024/05/07 18:44:18
The producers vary greatly in size, but a single grass, plant or alga,for example ,is given the same status as a single tree.This explains why is a true pyramid shape is often not obtained. Also parasitic food chains may give inverted pyramid of numbers.