A.VB6.0數(shù)據(jù)庫系統(tǒng)由三部分組成:用戶界面、數(shù)據(jù)庫引擎和數(shù)據(jù)倉庫
B.用戶界面是進(jìn)行人機(jī)交互的界面,用于顯示數(shù)據(jù)并查看或更新數(shù)據(jù)
C.數(shù)據(jù)庫引擎真正讀取、寫入和修改數(shù)據(jù)庫,并處理數(shù)據(jù)倉庫中所有內(nèi)部事務(wù)
D.數(shù)據(jù)倉庫是包含數(shù)據(jù)庫表的一個或多個文件
A.//Dim a As String
B./Dim a As String
C.‘Dim a As String
D.“Dim a As String