单项选择题分组交换网络会在两个设备之间建立专用连接，而电路交换网络可将消息分成小的包并基于“先到先服务”的原则进行处理。对或错？ A、正确 B、错误
单项选择题The word scientist is a specific word when compared with professional ; while it may be called a general word when compared with chemist . A、正确 B、错误
