问题：
[单选题] （ ） is exactly analogous to a marketplace on the Internet.
A、E-CommerceB、E-CashC、E-MailD、E-Consumer问题：
[单选题] （ ） is the sending and receiving of the messages by computer. It is a fast, low-cost way of communic
A、LANB、Post officeC、E-MailD、Interface问题：
[单选题] （ ） is the use of computing ...deliverd as a service over a network.A.Virtualzation B.Internet of th
A、ClouB、computer C、ClouD、computing问题：
[单选题] （ ） is used to model aggregates of information and the relationships these aggregates have to other.
A、flow diagramB、Entity relationship diagramC、Sequence diagramD、Structure diagram问题：
[单选题] （ ） languages enable nonprogrammer to use certain easily understood commands to search and generate
A、MachineB、AssemblyC、High-levelD、Query问题：
[单选题] （ ） managementincludesnegotiatingtheterms and conditions in contracts and ensuring compliance with.
A、Contract B、Document C、CommunicationD、Risk问题：
[单选题] （ ） must be between on-line deployment and final acceptance.
A、Detailed designB、Test runC、Internal testingD、Contract signing问题：
[单选题] （ ） 表示了系统与参与者之间的接口。在每一个用．例中，该对象从参与者处收集信息，并将之转换为一种被实体对象和控制对象使用的形式。
A、边界对象 B、可视化对象 C、抽象对象 D、实体对象问题：
