零序电流保护由哪几部分组成()
A、零序电流滤过器
B、电流继电器
C、零序方向继电器
D、电压继电器
参考答案:A, B, C
胃、十二指肠急性穿孔
A.腹腔抽出液呈黄色、浑浊、含胆汁、无臭气B.草绿色透明腹水C.血性腹水、胰淀粉酶含量高D.腹腔抽出液为稀脓性略带臭气E.血性腹水、臭气重
()measured at midship section and taken from inside the ship’s shell on one side to inside the ship’s side shell on the other side.
A.Length overall
B.Molded breadth
C.Amidships
D.Extreme breadth