单项选择题
Reusing frequencies in a cellular pattern (compared to “one big cell”)（）
A. Increases channel utilization, cost ,and interference. B. Increases capacity and cost, but decreases interference. C. Increases capacity, but decreases cost and interference. D. Increases capacity, cost, and interference.
单项选择题 Which cell pattern is recommended to use when using frequency hopping? （）
单项选择题 Which of these is not a prediction model for radio coverage? （）
单项选择题 Which of these assumptions is necessary to use in system balance? （）
