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                In the 18th century doctors believed that being clean was ________. . ( )(本题2.5分) 
A、 unimportant
B、 good for health
C、 harmful
D、 important
                    
                    
                    
                
                
                
            
        A、 unimportant
B、 good for health
C、 harmful
D、 important
参考答案
 
                