有形产品的电子商务模式有哪些？

&nbsp;&nbsp; <span>B2B</span> <span>、</span> <span>B2C</span> <span>、</span> <span>C2C</span> <span>、</span> <span>B2M</span> <span>、</span> <span>M2C</span> <span>、</span> <span>B2A</span> <span>（即</span> <span>B2G</span> <span>）、</span> <span>C2A</span> <span>（即</span> <span>C2G</span> <span>）七类电子商务模式等</span>