随着电子技术的进步,有线电视技术的迅速发展,各地能够接收到的电视节目已大大增加,极大地丰富了人们的生活。但几年前购买的彩电,一般只有8～12套预选器(8～12个选台按键),也就是说,最多只能预调8～12套电视节目(很多地区已能收到十几至二十几个台的电视节目),已远远不能满足需要。丰富 With the advancement of electronic technology and the rapid development of cable television technology, television programs that can be received all over the country have greatly increased, which has greatly enriched people’s lives. However, color TVs purchased a few years ago, generally only 8 to 12 sets of pre-selection devices (8 to 12 channel selection buttons), that is to say, can only pre-adjust 8 to 12 sets of television programs (many regions have been able to receive more than a dozen Up to twenty television shows are far from meeting the needs. rich