A.數(shù)據(jù)系統(tǒng) B.數(shù)據(jù)庫管理系統(tǒng)(DBMS) C.應用程序系統(tǒng) D.計算機系統(tǒng)
A.數(shù)據(jù)庫故障 B.前置類故障 C.人機界面類故障 D.網(wǎng)絡類故障
A.R≤3000 B.I;R≤4000 C.I;R≤5000 D.I;R≤2000/I