避雷器带电测试时，参考电压信号引线拆除时，必须由运行人员负责配合。（）
参考答案：对
He has entertained hopes of being admitted to a sight of the wonderful valley , of ____ beauty he has heard .
A．which
B．of whose
C．whose
D．form which
从机械强度考虑，架空线路用的铝线截面应大于（）㎡。
A、10
B、16
C、25
