Listening 1Questions 1-12What do the athletes say about their relay race, and about teams, colours and events?[音频]
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Listen to Section 2 of the audio.
Listen to Section 3 of the audio.
如果小区半径R=15km,同频再用距离为D=60km,用面状服务区组网时,可用的单位无线区群的小区个数最少为()。
A. 7
B. 5
C. 4
D. 3
一个具有k条边的无向图,采用邻接表存储,则共需要( )个邻接结点
A. k
B. 2k
C. k(k-1)/2
D. k(k+1)/2