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为了解决信道数少和用户数多之间的矛盾,蜂窝移动通信网在空域上使用了()技术提高通信系统的通信容量。

单选题
2021-09-01 19:44
A、频率再用;
B、频分多址;
C、频分双工;
D、频率调制。
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正确答案
A

试题解析

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