右图是某地区某种动物的种群年龄结构调查结果该种群的最终�展趋势是 A.总能量增加 b.种群密度下降 C.受到的环境阻力不变 D.营养级能量 Template


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tomski右图是某地区某种动物的种群年龄结构调查结果该种群的最终�展趋势是 a.总能量增加 b.种群密度下降 coloring