A.處理數(shù)據(jù)B.接受數(shù)據(jù)C.轉(zhuǎn)發(fā)數(shù)據(jù)D.存儲數(shù)據(jù)
A.音頻B.2MC.AbisD.空中
A.1:1B.1+1C.N+1D.N:1