引用:
原帖由 GH 于 2009-2-15 19:30 发表 
大家有培训题目都可以贴上来, 我们看看能不能提供合适答案.
producers: are all green plants.
consumers: every organism that eats something else.
decomposers: organisms such as fungi and bacteria.
Design a food web that includes at least one producer,one consumer,and one decomposer. Arrows from each prey to its predator.

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