2. 外语
  3. In 1948, people living in remote areas could see TV programs by ______ in the United States. As the bandwidth increased to 550

In 1948, people living in remote areas could see TV programs by ______ in the United States. As the bandwidth increased to 550

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问题 In 1948, people living in remote areas could see TV programs by ______ in the United States.
As the bandwidth increased to 550 MHz, the number of TV channels increased by ______compared with the early cable systems.
选项 A、24
B、33
C、58
D、91
答案C
解析 本题涉及到电视节目数量的比较。该段提到早期的电缆系统只能收到33个频道，随着技术的进步，当频宽增加到550 MHz时，电视频道增加到91个，也就是说，与早期的电缆系统相比，电视频道增加了58个，故答案为 [C]。
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