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举报参考答案：
举一反三
【多选题】下列措施中，能够预防井下电气火灾的有( )。
A.
电缆悬挂要符合《煤矿安全规程》规定
B.
校验高低压开关设备及电缆的热稳定性和动稳定性
C.
按电气保护整定细则整定保护装置
D.
采用矿用阻燃橡套电缆
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers
相关题目：
【多选题】下列措施中，能够预防井下电气火灾的有( )。
A.
电缆悬挂要符合《煤矿安全规程》规定
B.
校验高低压开关设备及电缆的热稳定性和动稳定性
C.
按电气保护整定细则整定保护装置
D.
采用矿用阻燃橡套电缆
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers
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