A.數(shù)據(jù)可以共享；數(shù)據(jù)結構化；數(shù)據(jù)獨立性；統(tǒng)一管理和控制
B.數(shù)據(jù)結構化；數(shù)據(jù)互換性；數(shù)據(jù)冗余?。唤y(tǒng)一管理和控制
C.數(shù)據(jù)可以共享；數(shù)據(jù)冗余小；數(shù)據(jù)獨立性；數(shù)據(jù)的完整性；數(shù)據(jù)的安全性
D.數(shù)據(jù)非結構化；數(shù)據(jù)獨立性；數(shù)據(jù)冗余??；統(tǒng)一管理和控制