What can go up and come down without moving?
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![What can go up and come down without moving?](/uploads/image/z/12214108-28-8.jpg?t=What+can+go+up+and+come+down+without+moving%3F)
What can go up and come down without moving?
What can go up and come down without moving?
What can go up and come down without moving?
汉字 卡
什么可以不用移动就能上升或下降
什么可以上升下降却没有移动?