2. 外语
  3. According to the passage, the maximum intensity of sound coming from commercials______. Commercials create the sensation of lou

According to the passage, the maximum intensity of sound coming from commercials______. Commercials create the sensation of lou

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问题 According to the passage, the maximum intensity of sound coming from commercials______.
Commercials create the sensation of loudness because______.
选项 A、TV stations always operate at the highest sound levels
B、their sound levels are kept around peak levels
C、their sound levels are kept in the middle frequency ranges
D、unlike regular programs their intensity of sound varies over a wide range
答案B
解析
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