        
     
                                                                                                                       
         
      
          
                                
         
  1                                              
  2               
  3                     
        
  1        20            
  2                     
  3            
    
  7  8                          
          
              
        
  ⒈       
  ⒉                     
  ⒊                       
  ⒋                     
      
  ⒈             
  ⒉ 6.23          
             
                                                                 
                                                                    2012.6. 21