【单选题】某分部工程双代号网络计划如下图所示,其关键线路为( )。
【简答题】I crossed the street to _________ meeting him, but he saw me and came running towards me. 我横穿马路以便避开他,但他看到了我并朝我跑过来。
【单选题】I crossed the street to____ meeting one of my former classmates, but he saw me and came running towards me. A. avoid B. create C. make D. reflect
【单选题】当保护对象为可燃气体和甲、乙、丙类液体储罐时,水雾喷头与储罐外壁之间的 距离不应大于( )。
【单选题】当保护对象为可燃气体和甲、乙、丙类液体储罐时,水雾喷头宜布置在保护对象周围,与保护储罐外壁之间的距离不应大于()m。
【简答题】什么是主动土压力、被动土压力和静止土压力?三者的关系是什么?