多项选择题

属于5G无线网络技术的有（）
A、超密集组网
B、大规模MIMO
C、全双工
D、D2D

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单项选择题

When someone wants to end a conversation, he will say, “I’ve got something that comes up.” This sentence means “当有人想要结束对话，他会说‘我有事情要处理’。” ( )
A. 对

B. 错

单项选择题

Liangzhu Ancient City Site of China was approved to be listed in the World Heritage List at the ______ World Heritage Conference.
A、41
B、42
C、43
D、44