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				9．Zhong Nanshan.the famous medical scientist.has devoted most of his life           useful ways in treating cough diseases．A．to finding      B．find          C．to find        D．finding			【查看更多】
			


		
     
    


		
    
		
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    Zhong Nanshan，the famous medical scientist，has devoted most of his life ________ useful ways in treating cough diseases．
      
    A．to finding           B．find         C．to find         D．finding
    

			
    
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