A.MySQL B.Microsoft Access C.Oracle D.AdobeReader
A.層次式數(shù)據(jù)庫B.網(wǎng)絡(luò)式數(shù)據(jù)庫C.關(guān)系式數(shù)據(jù)庫D.塔式數(shù)據(jù)庫