在变压器中性点装设消弧线圈的目的是()。
A、提高电网电压水平
B、限制变压器故障电流
C、补偿网络接地时的电容电流
参考答案:C
-- Bob, please go and buy some vegetables for me. I’m busy now.
-- Can you be more ________, mum?
-- Some tomatoes and a cabbage.
A.specific
B.firm
C.abstract
D.complete
简述OSPF路由协议中stub区域的特点