问题描述：
海豚,dolphins,快!求
How long can dolphins live?
How far can a dolphin swim in a day?
How fast can dolphins swim per hour?
How do dolphins sleep?
How long do dolphins sleep?
回答,快!
要准确的答案！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
How long can dolphins live?
How far can a dolphin swim in a day?
How fast can dolphins swim per hour?
How do dolphins sleep?
How long do dolphins sleep?
回答,快!
要准确的答案！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
问题解答：
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