    
   
             
   
       
        
          
        
         
          
         
          
          
   
       
          
          
       
        
         
       
          
        
  
      
         
       
      
       
       
      
       
        
  
     
       
      
     
      
    
     
       
      

     
       
      
    
     
      
     
      
      

    
    
      
  10 1    
 70  
      
     
      
    
        
           2019 10 1