题目内容
TCC 根据列车进路和轨道区段状态等信息，实现站内和区间轨道电路的 编码功能，并按控制轨道电路的 。
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列车进路没有开放时，TCC 向股道发送 码或检测码（低频值为 Hz），道岔区段发送检测码。
According to the dictionary named The Random House Dictionary of the English Language, communication is derived from the Latin word communicare which means “to ___________” or “to ___________.”
Communication includes nine components, they are: sender/source, __________, channel, message, __________, __________, feedback, noise, __________.
Western cultures emphasize the ___________ function of communication;that is _____________.
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