猜一猜 What has roots as nobody sees,It is taller than trees.Up,up it goes.And yet never grows?

猜谜

“what has。。”的问题 what has happened?是什么意思 为什么用HAS What table has no leg? what happened /what has hanppend/what has been haapening what she has done has nothing to do with me what has four legs but cannot walk What----good help he has given us! what has a neck but no thorat 猜一猜 What has roots as nobody sees,It is taller than trees.Up,up it goes.And yet never grows? What advantages do you think online education has?