RADSS型220kV母差保护交流电流、交流电压以及跳闸回路是如何进行切换的？
RADSS型220kV母差保护在倒母线的操作过程中运行方式如何？
You are under sail and overtaking a tug and tow.Which action is correct（）. The power-driven tug must maneuver to avoid collision。 You must maneuver to avoid the tug and tow。 You must maneuver to avoid collision only if the tug is to leeward and the wind is on your port side。 Both vessels are required to maneuver to avoid collisio。
供应链管理中渠道结构的影响因素主要有（）。 A.市场覆盖率目标。 B.产品特征。 C.产品的自身价值。 D.客户服务的目标。 E.利润。
You are on a vessel that cannot comply with the spacing requirement for masthead lights.What is required in this situation（）. The vessel must carry only the lights that comply with the rules; the others may be omitted。 The vessel's lights must comply as closely as possible，as determined by her government。 The vessel must be altered to permit full compliance with the rules。 An all-round light should be substituted for the after masthead light and the stern light。
In a diesel engine, when the fuel is injected into the cylinder,（）
