下列关于鸟卵的结构和功能的描述不正确的是a卵壳对卵起保护作用b卵壳膜对卵起保护作用c卵壳上的气孔能够确保气体交换的进行d卵白是卵细胞 Template




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tomski下列关于鸟卵的结构和功能的描述不正确的是a卵壳对卵起保护作用b卵壳膜对卵起保护作用c卵壳上的气孔能够确保气体交换的进行d卵白是卵细胞 coloring