文本挖掘是什么意思:What has a bed but never sleeps， a mouth but never speaks？

What has a bed but never sleeps， a mouth but never speaks？ What has a bed but never sleeps, a mouth but never speaks?问一下这句话什么意思？ what has a neck but no throat what has a neck,but no head What has a body and a neck but no leg? what has a lot of teeth but no mouth Brain Teasers:What has a mouth but never speaks？？？ What has a tongue,but can't speak? what has a fork and mouth,but cannot eat? What has hands but no feet , a face but no eyes, tell but no talk?