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当前学科：低压电工考试
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变电站中，当工作电源因故障自动跳开后，备用电源（）动作使备用电源进入工作状态。
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推荐知识点:
There is a fundamental distinction between a Back-to-Back credit and a Transferable Credit which is as follows: (1)( ) The former original credit is in the name of original Irrevocable credit and the latter original credit is in the name of original Transferable Irrevocable Credit. (2)( ) In Back-to-Back credit operation, the original Irrevocable credit and the Back-to-Back credit are two wholly independent credits with wholly independent issuing bank undertakings. The Transferred credit derives not only its existence from the original Transferable credit, but also its utilization.
检测1000kV电压等级的绝缘子串时，当发现同一串中的零值绝缘子片数达到几片时，应立即停止检测。
下列关于民事诉讼证人出庭作证的表述中，不正确的是（）。
How are you getting along ____ your classmates and teachers?
下列情形中不属于突发事件的报告情形的是（）。
未有羊城，先有（）
增生性髋关节炎与弹响髋的主要不同点（）。
分析下列语句：name space TestCS{ public delegate void Hello(string target);}该语句的作用是()。
抗生素
流行性乙型脑炎患者发病第4天，体温40℃，呼吸26次/min，节律整齐，反复抽搐后昏迷，轻度发绀，膝跳反射亢进。下列叙述正确的有（）