单项选择题
A.AM B.UM C.TM D.PM
A.MIB B.SIB3 C.SIB5 D.SB
A.Iub B.Iur C.Iu D.Uu
A.物理层/ATM/AAL5/IP/TCP/GTP-U/Iu-UP B.物理层/ATM/AAL5/IP/UDP/GTP-U/Iu-UP C.物理层/ATM/AAL2/IP/TCP/GTP-U/Iu-UP D.物理层/ATM/AAL2/IP/UDP/GTP-U/Iu-UP
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