星形拓扑结构的优点是
参考答案：
控制简单；故障诊断和隔离容易；方便服务，中央节点可方便地对各个站点提供服务和网络重新配置。
I'm sorry I'm busy now. If I had time, I _____ for a picnic with you. [ ]
A. would go
B. will go
C. am going
