单项选择题
A subscriber makes a two-minute call and a four-minute call during the busy hour. How much traffic does he generate for that hour? （）
A.33 millierlangs B.66 millierlangs C.100 millierlangs D.10 millierlangs E.25millierlangs
单项选择题 Reusing frequencies in a cellular pattern (compared to “one big cell”)（）
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? （）
