數(shù)據(jù)集成面臨的問(wèn)題包括( )。
A. 通用標(biāo)識(shí)符問(wèn)題、數(shù)據(jù)丟失問(wèn)題
B. 通用標(biāo)識(shí)符問(wèn)題、數(shù)據(jù)重復(fù)問(wèn)題
C. 數(shù)據(jù)重復(fù)問(wèn)題、數(shù)據(jù)錯(cuò)誤問(wèn)題
D. 數(shù)據(jù)丟失問(wèn)題、數(shù)據(jù)錯(cuò)誤問(wèn)題
                                        
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