单项选择题
A.1 B.2 C.5 D.15
A.2 B.4 C.6 D.8
A.DL137Mbps，UL58Mbps B.DL137Mbps，UL85Mbps C.DL173Mbps，UL58Mbps D.DL173Mbps，UL85Mbps
A.16QAM B.64QAM C.QPSK D.32QAM
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