A flashing light is a light that（）.
- Aflashes at regular intervals at a frequency of 120 flashes or more per minute
- Bis yellow in color
- Cis visible over an arc of the horizon of not less than 180°nor more than 225°
- DAll of the above
问题
A flashing light is a light that（）.
参考解析：
分类：号灯与号型题库
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