     10         
                                  
                                
  
      
  
     1        
     2        
     3        
     4          
     5        
     6          
     7        
  
      
  
     1   ∙    
     2        
     3        
     4   ∙     
  
      
  
     1        
     2        
  
      
  
     1        

               
 
  
                              2017/01/23  
  
                  