      7     -    
            
           
2013-4-23   
    
  4   23         20                                                      22                                              100           379  3                     22                22  12    89  8          22                  10                       800                        1000              22        500            21         1000         22      1500                     22                                                                                                   2000                     21           500      200      300        
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