广播电视概论教程-畅读网

　　　　

广播电视概论教程

作者：陈祖继

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内容简介:

广播电视是20世纪的产物，在近百年的发展历程中，它时刻发生着日新月异的变化。如果说20世纪人类创造了电子传播技术的奇迹，那么21世纪的今天，人类又迎来了全球化传播的新时代。卫星传送、高速信息互联网、手机传播等的出现对传统广播电视提出了新的挑战，它预示着传统媒体将经历剧烈的变革，即旧媒体向新媒体的嬗变。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 64 LIMIT 1 [ RunTime:0.002276s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001531s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.002626s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1783748903 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.834146s ]

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