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    #跟帖#  回複:回複:初高中學生作業偏難點的水平 [腦筋急轉] - yma16(79 bytes ) 2010-04-21
    #跟帖#  where x is bigger than 0 and smaller than pi/6 [腦筋急轉] - yma16(40 bytes ) 2010-01-12
    #跟帖#  your post is very convencing. Thanks again. [腦筋急轉] - yma16(0 bytes ) 2010-01-04
    #跟帖#  回複:回複:thanks. [腦筋急轉] - yma16(0 bytes ) 2010-01-03
    is it possible that [腦筋急轉] - yma16(74 bytes ) 2010-01-01
    #跟帖#  thanks. I am just curious. [腦筋急轉] - yma16(27 bytes ) 2010-01-01
    is it possible that [腦筋急轉] - yma16(93 bytes ) 2010-01-01
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