Funny Quiz脑筋急转弯1.When you need me,you throw me away.But when you are done with me,you bring me back.What am I?当你需要我的时候,你把我扔到一边。但当你用完我的时候,你又把我取回来。我是什么呢?2.What is as big as you and yet does not weigh anything?什么东西是和你一样大但却没有重量的呢?3.What number can you take half of and leave nothing?哪个数字重走一半就什么都不剩了呢?