According to the article, which of the sentence can best describe the definition

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问题 According to the article, which of the sentence can best describe the definition of the telecommunication? [br] During the telecommunication, the first step is that ______.

选项 A、information should be changed into electronic signals
B、electronic signals should be changed into information
C、the signals should be transmitted by means of media such as telephone wires or radio waves
D、it should provide the key medium for information and signals

答案 A

解析根据文章第一段中第二句话和“Telecommunications devices convert different types of information，such as sound and video，into electronic signals. (电信设备将不同类型的信息，如声音和图像转换成电子信号。)”来推出。

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According to the article, which of the sentence can best describe the definition

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