单项选择题

According to the passage, the maximum intensity of sound coming from commercials ________.

A．does not exceed that of programs
B．is greater than that of programs
C．varies over a large range than that of programs
D．is less than that of programs

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热门试题

单项选择题

Commercials create the sensation of loudness because ________.

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

单项选择题

In the passage, the author is trying to tell us ________.

A．how TV ads vary vocal sounds to attract attention
B．how the loudness of TV ads is overcome
C．how advertisers control the sound properties of TV ads
D．how the attention-getting properties of .sounds are made use of in TV ads