题型:问答题 简答题 From what I learn about their hotel, the service and the weather, they their holiday very much.A.couldn’t have enjoyedB.shouldn’t have enjoyedC.needn’t have enjoyedD.can’t have enjoyed 查看答案
题型:问答题 简答题 关于电力电容器组的过电压保护整定原则的以下说法中,正确的有()。A、电力电容器组承受的过电压能力系数一般为1.1倍额定电压 B、电力电容器组承受的过电压能力系数一般为1.5倍额定电压 C、电力电容器允许短时间过电压运行,一般允许过电压时间为3~5分钟 D、电力电容器组过电压保护必须要有专用的电压互感器 查看答案