GSM networks used frequency Division Muptiplexing Access (FDMA) to mutiplexmutiple calles for channel in the bands.
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The mobile communication technology has evolved in four stages and correspondingly four generation of mobile phones have emerged thus far.
A. 对
B. 错
-- ______I help you with some shoes, madam?- Yes, 1 would like to try on those brown ones.
A. Will
B. Should
C. May
D. Must
抽签的任务就是正确地解决“机遇”与“控制”这一对基本矛盾。
A. 对
B. 错
抽签的其中之一原则是种子选手要按种子序号分开,最后相遇。
A. 对
B. 错