关于Ethernet基本说法不正确的是

A．每个结点以广播方式发送数据

B．冲突不可避免

C．采用CSMA/CD方法后，发送数据时进行冲突检测

D．采用CSMA/CD方法后，网中随机存在控制中心

The made-in-America idea of the global brand has built a name that people will buy on faith, and the pioneer was Coca-Cola.

A．is building

B．is to build

C．was to build

D．was building