下图是一个农业生态系统模式图关于该系统的叙述中正确的是a.该生态系统的主要成分是人 B.图中有2个箭头不能代表能量的流动 C.沼气池中的微 Template




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tomski下图是一个农业生态系统模式图关于该系统的叙述中正确的是a.该生态系统的主要成分是人 b.图中有2个箭头不能代表能量的流动 c.沼气池中的微 coloring