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                 . 20                  [AJHSME 1995] ( )
                             10 5 1 :

72% ( )          60% ( )     40% ( )      36% ( )

 9                      3             [AJHSME 1995] ( )
20                      4
5                                                       3  )
4                 ()
                  ()                                    5
7()
                  2( )           4 ()

                       6545       3

                             9 ()

                             20

                                                  .
                                   [AJHSME 1995] (

                             4

                                37        0 ()

                             1( )

                                     [AJHSME 1995] (       )

174 ( )          173 ( )     172 ( )      162 ( )

             36                       [AJHSME 1996] ( )

5() 4( )                               4  2 ()

                             3( )
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