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           ----What do you know the _____ of are the pig influenza in humans?
            
             ---- usually similar to regular human seasonal influenza .
            
             A. symptoms          B.sympathy           C.symbol            D.symptom
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
             
          解析:
               
          A考查名詞詞義辨析。句意：你知道人類感染豬流感后的癥狀嗎？通常與患流行性感冒癥狀相似symptom癥狀符合句意;sympathy同情；symbol符號。從what are可以看出是復(fù)數(shù)名詞。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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