A.4 B.8 C.16 D.32
A.1200 B.2400 C.4800 D.9600
A.僅語(yǔ)音 B.僅數(shù)據(jù) C.語(yǔ)音和低速數(shù)據(jù) D.語(yǔ)音和高速數(shù)據(jù)