A. 中国科技网 B. 中国公用计算机互联网 C. 中国教育和科研网 D. 中国公众多媒体通信网
A. stand by on VHF channel 14 B. come to VHF channel 14 C. VHF channel 14 is the best place for you to stay by D. remain in channel 14 and do not change
A. 正确 B. 错误