单项选择题
A.P-ALOHA B.S-ALOHA C.C.ALOHA D.R-ALOHA
A.M&C B.Console C.IP TrAffic
A.JPEG B.MPEG1 C.MPEG2 D.BIM
A.FDMA/DAMA B.CDMA C.TDM/SCPC D.OFDM
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