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          Theory is based on practice and ________ serves practice. 
          A．in turnB．by and by 
          C．by chanceD．in this case
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          短語辨析. A.依次;輪流    B. 不久以后C. 意外的  D.既然這樣.句意:理論基于實(shí)踐并反過來為實(shí)踐服務(wù).結(jié)合語境可知選A.
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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