家养动物与同种野生动物相比往往会�生较大的变异其原因可以解释为 A.食物的不同b.生活环境不同c.人工选择的结构d.自然选择的结果 Template




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tomski家养动物与同种野生动物相比往往会�生较大的变异其原因可以解释为 a.食物的不同b.生活环境不同c.人工选择的结构d.自然选择的结果 coloring