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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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    1-5 ABBDB   6-10 BBAAB   11-15 BBDBB   16-20 BABCB
    		
    
	
    
	
    
		
    


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