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 UID134068 帖子1858 积分6501 学分3532 个 金币2138 个 性别男 在线时间313 小时 
     
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                 Teacher:“I have two questions,it isn't necessary to answer the second question if you know the result of the first question.How much hair do you have?” 
 Student :“A hundred and twenty millions.”
 
 Teacher:“How do you know it?”
 
 Student:“It is not necessary to answer the second question.”
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