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【单选题】
长途线路的维护方针是（）。
A.
安全第一，预防为主
B.
预防为主，防消结合
C.
预防为主，防抢结合
D.
安全第一，防消结合
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参考答案：
举一反三
【多选题】空冷器的维护内容有（）
A.
管束和连接处是否泄漏和腐蚀，是否堵塞
B.
电机及各部分温度正常润滑良好
C.
电机电流，空冷压力及流量
D.
风叶是否松动
【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】空冷器的维护内容有（）
A.
管束和连接处是否泄漏和腐蚀，是否堵塞
B.
电机及各部分温度正常润滑良好
C.
电机电流，空冷压力及流量
D.
风叶是否松动
【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
参考解析：
题目纠错 0
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