某河流生态系统的营养结构共有4个营养级分别用abcd表示.一年内输入这4个营养级的能量数值如表 营养级 A b c d 能量 141 Template




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tomski某河流生态系统的营养结构共有4个营养级分别用abcd表示.一年内输入这4个营养级的能量数值如表 营养级 a coloring