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				 It’s necessary to have some     knowledge for this  job.A. electric       B. electrical  C.  electron       D.  electricity			【查看更多】
			


		
           
          


		
          
		
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           It’s necessary to have some____ knowledge for this job.
            
          A. electric             B. electrical    C. elctron              D. electricity
          

			
          
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