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    #跟帖#  不鼓励给别人做作业 [脑筋急转] - badminton(0 bytes ) 2010-09-12
    #跟帖#  一晚300元 [脑筋急转] - badminton(420 bytes ) 2010-07-28
    #跟帖#  Be serious [脑筋急转] - badminton(509 bytes ) 2010-07-15
    #跟帖#  Simplify [脑筋急转] - badminton(156 bytes ) 2010-06-25
    #跟帖#  by heart [脑筋急转] - badminton(1794 bytes ) 2010-05-04
    #跟帖#  Answer: A=pi*r*r/arccos((r-h)/r))-(r-h)sqrt(2rh-h*h) where A is [脑筋急转] - badminton(0 bytes ) 2010-04-20
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