题目内容
With ________, small buyers aggregate demand to create a large volume and then negotiate lower prices.
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_________ appear(s) in front of the current browser window.
In the ________, organizations sell their products or services to other organizations electronically from their own private e-marketplace website or from a third-party website.
_________ are similar to the B2C model.
Sell-side marketplaces are similar to the _________ model.
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