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Effective l（）is the key to a successful e-commerce business.(the business of transporting and delivering goods)
Effective l（）is the key to a successful e-commerce business.(the business of transporting and delivering goods)
正确答案：logistics
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C2B is the r（）of the traditional e-commerce model of B2C.(an exchange of positions or functions)
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In addition to making a note of what is being purchased and updating the order d（）， the shopping cart performs several other tasks.(a collection of data that is stored in a computer)