下载APP
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
【多选题】根据《通信线路工程验收规范》，直埋光（电）缆线路的下列地点应埋设光（电）缆标石（）
A.
光（电）缆接头、转弯点、预留点
B.
适于气流敷设的长途塑料管道的开断点及接头点
C.
敷设防雷排流线、同沟敷设光（电）缆的起止点
D.
需要埋设标石的其他地点