A.書(shū)目數(shù)據(jù) B.圖片數(shù)據(jù) C.音頻數(shù)據(jù) D.視頻數(shù)據(jù)
A.中亞 B.北美 C.南美 D.北歐
A.1985 B.1995 C.1987 D.1997