下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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
【单选题】交流故障处理中，作业线路在遇到高压线路时要确保安全距离。距高压线最小距离：35KV以下（），35KV以上（）。
A.
1.5米，4米
B.
2.0米，4.5米
C.
2.5米，4米
D.
2.5米，4.5米