工厂供电系统中,()电流最大,因此它造成的危害也最为严重。
参考答案:三相短路
—I'm sorry ________ (brother) you, but can you tell me the way to the nearest supermarket?
—I will do some shopping, too. Shall we walk there together?
成型生产前准备工作中工艺方面操作工要做的准备?