A.數(shù)據(jù)>數(shù)據(jù)元素>數(shù)據(jù)項(xiàng) B.數(shù)據(jù)<數(shù)據(jù)元素<數(shù)據(jù)項(xiàng) C.數(shù)據(jù)>數(shù)據(jù)項(xiàng)>數(shù)據(jù)元素 D.數(shù)據(jù)元素>數(shù)據(jù)>數(shù)據(jù)項(xiàng)
A.數(shù)據(jù)元素包含數(shù)據(jù) B.數(shù)據(jù)包含數(shù)據(jù)元素 C.數(shù)據(jù)域數(shù)據(jù)元素沒(méi)有關(guān)系 D.都不對(duì)
A.存儲(chǔ)形式 B.邏輯關(guān)系 C.不確定 D.都不對(duì)