下列有关生态系统结构的叙述正确的是a.每种生物在生态系统中只能处在一个营养级上b.动物都属于消费者其中食草动物处于第二营养级c.自养生物 Template




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tomski下列有关生态系统结构的叙述正确的是a.每种生物在生态系统中只能处在一个营养级上b.动物都属于消费者其中食草动物处于第二营养级c.自养生物 coloring