后履行抗辩权:what is it that is not an airplane but moves through the sky,not a river but is full of water?

来源：百度文库 编辑：神马品牌网 时间：2024/05/08 11:52:15

cloud(云彩）

那是什么?
不是飞机,但却在空中飞行
不是河流,但却流淌着水

what is it ????

what is that? What it is that always behind time?(谜语) what is it that makesJoe angry? it is what she can`t find that...请问这一问一答对吗？ What is it what is it WHAT IS IT？？？ What time is it? guess what it is what is it What is it?????????