【简答题】在交流电路中,实际所消耗的功率叫做(),其值等于()、()和()三者的乘积。
【单选题】It was not until we had stayed together for a couple of weeks______we had a lot in common.
【判断题】电压互感器需要校验内部动稳定和外部动稳定。
【单选题】We had worked only one hour it began to rain so heavily that we had to put up our tent. [ ]
【单选题】We had to start at exactly the same time, so we had our watches ____.
【判断题】曲轴箱通风单向阀的失效会造成发动机低速时运转不稳定。
【多选题】当有外加电场的作用,半导体中漂移电流的大小与( )有关。
【简答题】毛石基础顶面宽度应比墙基地面宽度大()mm;梯形基础坡角应大于()度;阶梯型基础每阶高度不小于()mm,每阶挑出宽度不小于()mm。