开放作文。

      请根据下面提示，写一篇短文。词数不少于50。

  Xiao Ming tells you that he had 100 yuan yesterday morning, which he put into the pocket of his jacket.He

spent 40 yuan yesterday afternoon. But now when he reaches into the pocket of his jacket, he finds only10

yuan.     

     He is wondering what has happened to the rest of the money. As his friend, you suggest to him three

or four different possibilities concerning the missing money. 

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（）是车底架和转向架摇枕衔接的地方。在其下部安装的上旁承和上心盘，分别与转向架摇枕上的下旁承和下心盘相对，并将重量传给走行部。