    

                                                      
            
         :   
                                                                                                       
        :     
                                                                                                                               
        :   
                                                                                                                                               1                         
        :  
                                                                                                           
        :    
                                                                                                      
      :  
        20％                                                                                           B                                             
        :  
                                                                                                                               