未知题型
C2B e-commerce refers to all business activities that consumers actively carry out with enterprise groups through the Internet.
错误。C2B (Consumer-to-Business) e-commerce refers to a busines......
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判断题 outum系统对测试手机没有要求，任意手机都可以作为系统测试终端使用。
未知题型 Cross-border e-commerce can be handled with customs, banking, taxation, insurance and transportation through the network
未知题型 防火墙是目前保护网络安全最主要的手段之一（）
