【单选题】In a multi-generator system, when prime mover fails to provide required speed, the generator may act as a motor, ( ).
A.
drawing power from the system
B.
supplying power to the system
C.
drawing reactive power from the system
D.
supplying reactive power to the system
【单选题】由梨状肌下孔出盆,再经坐骨小孔入坐骨直肠(肛门)窝的结构
【单选题】97 下列各项,《水污染防治法》未作禁止规定的是( )。
D.
向水体排放和倾倒工业废渣、城市垃圾和其他废弃物
【多选题】下列建设工程施工合同中属于无效的有( )
【判断题】IPv4 的IP地址表示方式T通常可以冒分十六进制表示。( )