问题描述：
请各位高手帮忙翻译一下这篇文章和问题,最好能用英语写出答案!（写出答案者奖5分）
The first redios began in the 1920s.At that time the sound was very poor.So people had to listen on headphonrs.
Television began in the 1930s.It was black and white.In the 1960s,the TV programmes began to have colour.
Do you know when computers begin?
The first redios began in the 1920s.At that time the sound was very poor.So people had to listen on headphonrs.
Television began in the 1930s.It was black and white.In the 1960s,the TV programmes began to have colour.
Do you know when computers begin?
问题解答：
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