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Marketers usually use a statement to get attention of customers, or a question to create suspense.
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A、a group of firms that coordinate their pricing and quantity decisions.
B、a type of oligopoly in which the demand curve is "kinked."
C、a duopoly market where firms have the exact product.
D、a group of firms that all produce the same level of output.
A、Generally, there are two kinds of light pollution: ecological pollution and astronomical light pollution.
B、The negative effects of GM crops have been shown on animals in many studies.
C、There have been about 400 cancer deaths among 100,000 Japanese nuclear bomb survivors.
D、
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