单项选择题
Which of these is not a prediction model for radio coverage? （）
A.Algorithm-9999 B.Cost-231 C.Okumura-Hata D.Printhana E.Walfish-Ikegami
单项选择题 Which of these assumptions is necessary to use in system balance? （）
单项选择题 What is system balance? （）
单项选择题 A particular cell is expected to support 6 Erlangs of traffic at 1% Grade of Service. How many traffic channels are required?（）
