操作系统是软件系统的核心。
参考答案：对
解析：操作系统是软件系统的核心。
分布式系统与计算机网络的主要区别不在它们的物理结构上，而是在______。
A．服务器软件
B．通信子网
C．高层软件
D．路由器硬件
In the process of communication requirement analysis, the project manager should consider the number of potential communication channels or paths as an indicator of the complexity of a project's communication. According to Metcalfe's Law, a project with 10 stakeholders has（）potential communication channels.
A.10
B.45
C.50
D.100
