如图所示鸟卵的结构示意图以下说法正确的是a���构成卵细胞b将来�育成新个体的结构是�c能为胚胎�育提供营养的是�d只要有亲鸟孵化 Template




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tomski如图所示鸟卵的结构示意图以下说法正确的是a���构成卵细胞b将来�育成新个体的结构是�c能为胚胎�育提供营养的是�d只要有亲鸟孵化 coloring