题目

观察了不同动物的卵,小芸想根据有无硬壳给它们分类,请你帮助她完成连线。鸡卵                                                                      有硬壳                                                                      龟卵蛇卵                                                                      无硬壳                                                                      蛙卵鱼卵                                                                      蚂蚁                                                                         卵 答案:
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