2007 4 21  100                            NN 
                                                             CC 
                  17.85 6 ( 2  4 )  3 5                          .. 
           1.                         
                       17    13  5  3                     II 
          2. b a ______. 
                                                     AA 
          3.    
                                (0.7  13)  (6.3  40) SS 
                      3 5  3         28      7 
            3  5=5                              ______. 
                                  1  1  1     II 
                                 (    )  (  0.1) 
                                  5  6  47 EE 
                        2  2         4 
          4. m  n   5, m  n   13 ,  m  n ______. 
          5.  
                                     BB 
            . 
                                AA 
                           UU 
                      HH 
          6.                         ______. 
                     3 n 1  2n  2 3n  1  n 
                         .. 
          7. 280 .   
            585   6 ,                                   
             WW 
            ______. 
          8.  
       WW 
WW                                      1 
         a,b,c 7a  2b  3c  13   
           5a  7b  22c 13                                          NN 
        ABCD AM   =   MN   =   ND  
           BE = EF = FC ABEM MEFN NFCD  
                                                     S  S2  S3 
                             S                       1       CC 
           S  S S    2            ? AE  
                  1  2  3   S1  S3                      3        .. 
                                                          II 
           EN NCAC  
         4 9 9 9                                     AA 
            3   
           19 .    SS 
            II 
           ,   
            9  .   9   
                                          EE 
           .                                           
                                     BB 
                                AA 
                           UU 
        .               
                      HH 
                         .. 
             WW 
                  1                               1 
           3   3  
                  8                               8 
       WW 
           .   
WW                                      2 

第十二届决赛初一组.pdf