根据达尔文的自然选择学说下列关于长颈鹿进化过程的解释正确的是 �长颈鹿的祖先有的颈长有的颈短 �在缺乏青草的环境中颈长的长颈鹿能吃 Template




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tomski根据达尔文的自然选择学说下列关于长颈鹿进化过程的解释正确的是 �长颈鹿的祖先有的颈长有的颈短 �在缺乏青草的环境中颈长的长颈鹿能吃 coloring