文档介绍：美国四大广播电视公司
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
美国四大广播电视公司
哥伦比亚广播公司（CBS） 公司总部：纽约
Columbia Broad-casting System，简称CBS
美国三大商业广播电视公司之一，经费来自广告广播收入。1927年2月18日创办，原为16家广播电台组成的独立广播电台联盟（United Independent Broadcasters, Inc.），后与哥伦比亚唱机唱片公司（Columbia Phonograph and Records Company）联合组成哥伦比亚唱机广播公司（Columbia Phonograph Broadcasting System），于9月18日通过16家附属广播电台向全国广播，成为第二个全国性广播网。不久，哥伦比亚唱机唱片既定出，公