A.數(shù)據(jù)元素>數(shù)據(jù)項 B.數(shù)據(jù)元素<數(shù)據(jù)項 C.數(shù)據(jù)項>數(shù)據(jù)元素 D.都不對
A.可讀性 B.可寫性 C.輸出 D.可操作性
A.集合B.數(shù)據(jù)C.數(shù)據(jù)項D.數(shù)據(jù)元素