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| CATV | |
| 作者姓名： | 江川 郭克晴 |
| 作者单位： | 江西省遂川县瑶夏中学 |
| 摘 要： | CATV is a short way saying “com-munity antenna (公用天线) television”.But “cable television” is the name mostpeople use. Cable television allows viewers(观众) to receive TV programs that theycan not pick up with their ordinaryantenna.Television signals (信号) do not fol-low the curve(曲线) of the earth. Theytravel in straight lines in all directions. Sig-nals from a TV station move towards thehorizon(水平线) and then go into space.If you live only a few miles from a TVstation, you may… |
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