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

According to the passage, cutting trees to grow more food______.

A．will widen the gap between the developed and the developing countries
B．is but a short-term relief to the food problem
C．can hardly alleviate the shortage of food
D．proves to be an effective way out for impoverished nations

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