第24题:[单选题] The correct method of switching off a marine radar is to turn power switch to ______ position first,then to ______ position. A.Off/standby B.Standby/off C.Standby/close D.Close/standby 参考答案:B 【参考译文】关闭雷达的正确方法是先把开关打到备用状态,然后到关闭状态。 【解 析】switching off关闭