如图是鸟卵的结构图请据图作答.1图中的�是指 里面含有细胞核是进行胚胎�育的部位今后能�育成雏鸟.2图中的钝端的气室能为胚胎 Template




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tomski如图是鸟卵的结构图请据图作答.1图中的�是指 里面含有细胞核是进行胚胎�育的部位今后能�育成雏鸟.2图中的钝端的气室能为胚胎 coloring