单项选择题 下列企业所采用的电商模式属于C2B是（ ）。 A、苏宁易购 B、唯品会 C、尚品宅配 D、京东商城

单项选择题 Which of the expression is suitable for expressing respect in handshakes? A、It is an honor to meet you. B、I am proud of you. C、Please take care of yourself. D、I’m grateful for your help

未知题型 云计算的部署模式有：________。