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                题目内容
                (河南大学-大学英语(一))
            
            
                A pause can make all the _______ in the world between an effective speech and an ineffective one in the hands of a master.
A.difference
B.effect
C.impression
D.contribution
                    
                    
                    
                
                
                
            
        A.difference
B.effect
C.impression
D.contribution
参考答案