we are little babies of a big family.we live in lakes,rivers and seas.When it is hot,we go up into
问题描述：
we are little babies of a big family.we live in lakes,rivers and seas.When it is hot,we go up into
the sky.When it is cole,we come down again.We help plants grow fast.What are we?
答
答案是：fish 鱼
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