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                                    判斷題
                                    
    實體資源一般包括自建數(shù)據(jù)庫、聯(lián)機數(shù)據(jù)庫、光盤數(shù)據(jù)庫、數(shù)據(jù)資源導(dǎo)航等類型。
    
                                
    
                                
                                
                                    
    
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