问题描述:
英语翻译
A mobile phone is in fact a small radio.A radio sends a person's voice over a long way to another radio .A voice that is sent by radio is called a signal.A radio signal travels very quickly.Do you know what use a mobile phone has?(另外这里的 has )劳驾!
A mobile phone is in fact a small radio.A radio sends a person's voice over a long way to another radio .A voice that is sent by radio is called a signal.A radio signal travels very quickly.Do you know what use a mobile phone has?(另外这里的 has )劳驾!
问题解答:
我来补答展开全文阅读