如图是鸟卵的结构图请据图回答1在横线上写出以下结构的名称�卵黄系带卵黄系带 �卵白卵白 �卵黄卵黄2图中的�卵壳卵壳具有保护作用 Template




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tomski如图是鸟卵的结构图请据图回答1在横线上写出以下结构的名称�卵黄系带卵黄系带 �卵白卵白 �卵黄卵黄2图中的�卵壳卵壳具有保护作用 coloring