UC知道Do you like dolphins
来源：百度知道 编辑：UC知道 时间：2024/06/08 07:55:38
Do you like Dolphins? Dolphins live 1 water, but they are not fish. They are mammals (哺乳动物) that live in water. It has to breathe (呼吸) air to the top of the water very often. A dolphins nose isn't 2 to see. It's just a very small hole 3 top of the dolphin's head. This hole is called a blowhole. A dolphin 4 up every minute or so to breathe. It opens blowhole and takes air in, and then goes back into the water again. It can stay 5 the water for six or seven minutes if it has to. A dolphin's ears are very small, 6 its mouth is very 7 . It has almost one hundred teeth. A dolphin 8 very fast. Scientists are studying ways to 9 boat go faster through the 10 .
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