PT、CT运行中应特别注意什么问题？
参考答案：
运行中PT二次侧严禁短路，运行中的CT二次侧严禁开路。
施工升降机国家标准中()是推荐性标准。
A、所有标准都有
B、技术条件
C、检验规则
D、安全规则
I have steerage way.It is said that（）.
A.I am underway
B.I am out of control
C.I am not making way through the water
D.I have the amout of movement forward which the ship need to be steered properly
