题目内容

作为使用2.4G频率范围的802.11b/g协议，在地区码为CN时可使用的最大信道数量是（ B ）。

A. 14
B. 13
C. 12
D. 11

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（）是一种移动通信硬件架构，把无线网络设备覆盖的无线服务区域，部署成一个个正六边形的小区域，每个小区设一台无线接入点AP，形成了形状酷似“蜂窝”的结构，如图所示称为蜂窝W无线覆盖方式。

The ______conference which I attend every year is going to be held in London in January next year.

A. substantial
B. annual
C. apparent

According to the terms of your , you must give three months' notice if you intend to leave this company.

A. contract
B. distinction
C. amateur

We were honored that so many people of ______and talent were present to discuss the issues.

A. amateur
B. contract
C. distinction