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为什么鲸鱼不是鱼呢？是因为它的体型比较大吗？
为什么鲸和海豚都不是鱼呢？是因为它们的体型比较大吗？你知道答案吗？一起来看看这两个科普故事《为什么鲸和海豚都不是鱼》《为什么鱼的身上会有粘液》吧~更多动物科普视频，欢迎关注猫小帅
猫小帅十万个为什么58/100
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