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单选题
1234. 当相应的装置运行时,如果信号器面板TRANSIT灯不亮,则认为该灯不工作
A
If an annunciator panel TRANSIT light fails to illuminate while the corresponding device is in motion, then this light must be considered inoperative.
B
When related device is in operation and if annunciator panel TRANSIT light comes on so this light does not work.
C
The light is considered to be available if the annunciator panel TRANSIT light goes off when the related device is in motion.
答案解析
正确答案：A
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