下列各现象中的哪一种不属于自然选择起作用的例子a纯种长毛垂耳狗的形成b因工业污染而使某种蛾子�生�化c某些细菌对抗生素的抗性d头�里 Template




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tomski下列各现象中的哪一种不属于自然选择起作用的例子a纯种长毛垂耳狗的形成b因工业污染而使某种蛾子�生�化c某些细菌对抗生素的抗性d头�里 coloring