你平静地坐在前面50英寸高清崩落n, clicking on whatever TV show strikes your fancy. It wasn't always like this.Televisionhas gone through tremendous transformations during its relatively short lifespan. The medium started off small: in 1948, only 0.4 percent of homes in the U.S. had TVs. Butradiolisteners began to switch on televisions, and, in seven years, TV ownership had increased to 55 percent [source:Johnson]. By 2014, televisions had expanded to 116 million households [source:Nielsen]. And remember when there wasn't even color? (No, you probably don't.)
Those changes only cover screens, tubes and boxes. Techniques, equipment, financing, writing, monitoring and producing have come a long way since the early days. If you continue reading, you'll see: TV today is not your father's television.
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