2. 外语
  3. In 1948, people living in remote areas could see TV programs by ______ in the United States. What do we know about the "ghostin

In 1948, people living in remote areas could see TV programs by ______ in the United States. What do we know about the "ghostin

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问题 In 1948, people living in remote areas could see TV programs by ______ in the United States.
What do we know about the "ghosting" from the passage?
选项 A、It is a double image of TV.
B、It refers to the speed of light.
C、It was eventually solved by engineers.
D、It refers to the speed of the radio signals.
答案A
解析 本题涉及到“ghosting”的含义。该段提到无线电广播信号的速度与电视信号的速度，当这两个信号到达电视调谐器的时间间隔不到一秒时，电视上就会出现重影，这就叫做“ghosting”，故答案为[A]。
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