The phrase when built in the certificate of vessel’s nationality definitely means（）.
A. when was your vessel built
B. at what time is your vessel building
C. when is your vessel built
D. at what time you built your vessel
查看答案
后醍醐天皇在1336年又被川端氏驱逐，川端氏在京都建立了一个新的幕府。
A. 正确
B. 错误
Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.
A. heat conduction into the injected fuel oil
B. heat conduction into the water jacket wall
C. water circulation through passages in the holder
D. fuel oil circulation through passages in the holder
交流电磁线圈误接到额定电压相等的直流电源上，或直流电磁线圈误接到额定电压相等的交流电源上，分别有什么后果？为什么？
依据华电《电力安全工作规程》（电气部分）（试行），下列哪些内容是检修发电机（励磁机）时必须要做好的安全措施（）
A. 断开发电机的断路器（开关）、隔离开关（刀闸）和励磁开关
B. 将电压互感器从高、低压两侧断开
C. 断开断路器（开关）、隔离开关（刀闸）的操作能源
D. 在发电机和断路器（开关）间或发电机定子三相出口处（引出线）验明无电压后，装设接地线或合上接地刀闸
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