做灰线的工具，一般是根据灰线的尺寸形状制成木模，木模分阴模、阳模两种。( )
参考答案：错
My good friend Rose went to the party with her husband, ________ a happy evening of wine, food and
song.[ ]
A．expecting
B．to expect
C．expected
D．having expected
电力系统出现两相短路，短路点距母线的远近与母线上负序电压的关系是（）。
A、距故障点越远负序电压越高
B、距故障点越近负序电压越高
C、与故障点位置无关
