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Guitars usually have ebony or rosewood fretboards. The demand for ebony and rosewood varies with the demand for guitars. This is an example of _________.
答案:
joint demand===derived demand
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Which of the following statements about business-to-business transactions in general are likely to be correct?
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They can be for high volume and high value purchases.===They...
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High-value purchases are relatively common in which business markets?
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Producer and institutional===Reseller and government
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