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【单选题】
This passage is mainly about ______.A.
the function and the use of the Internet
B.
the application of digital technology
C.
the development of small businesses
D.
the advantages of online advertising
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【多选题】关于8通道RRU，下面说法正确的是：
A.
常用于室内覆盖或者热点、盲点的覆盖
B.
常用于室外宏覆盖和超远覆盖场景
C.
8通道能实现更大覆盖、更高速率、更好性能
D.
将用作国际市场的主力机型
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