【判断题】保护接零是借助接零线路在设备漏电时形成单相短路,促使线路上的保护装置动作,从而切断故障设备的电源,保护电路。
【单选题】利用液压或机械传动装置,将圆锥形金属探头压入地基土中,依据比贯入阻力的大小来判定地基土的工程性质,这种方法称为( )。
【简答题】In China,people born in and after the 1980s are called the post-80s generation(一代人).Most of them come from single-child families. However,this generation is playing a more and more important part in C...
【简答题】The 1980s saw the start of the ___ development of some special economic zones in China.
【单选题】以需要为研究基础,着重对激励的原因与起激励作用的因素的具体内容进行研究,这种理论是()。
【单选题】The 1980s ____ the start of the swift development of some special economic zones in China.
【单选题】相间距离保护的阻抗继电器采用零度接线的原因是( )。
B.
能正确反应K(3),K(2),但不能反应K(1.1),K(1)
【简答题】In China,people born in and after the 1980s are called the post-80s generation(一代人).Most of them come from single-child families.However,this generation is playing a more and more important part in Ch...