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

Grocery store price lists are updated by______.

A．a scanner
B．a telephone hookup
C．an adding machine
D．an employee

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