下列各项中不能称为生态系统的是 .�一块农田中的所有生物�一个养有�鱼的水草和小鱼缸�一条河流�一个植物园.——青夏教育精英家教�—— Template




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tomski下列各项中不能称为生态系统的是 .�一块农田中的所有生物�一个养有�鱼的水草和小鱼缸�一条河流�一个植物园.——青夏教育精英家教�—— coloring