向脚手架上运块石时,严禁投抛,脚手架上只能放几层石料,且不得集中堆放?
国际图联1975年将公共图书馆的社会职能概括为()
土路基上含有少量腐植物是允许的,对吗?
local people are questioning the ________(wise) of spending so much money on the new road
能否在脚手架底部、构筑物近旁进行影响基础稳定性的开挖?
People today are highly concerned about the quality of the air they___(breath).
采用碱性焊条一般使用 ( ) 电源和 ( ) 操作方法。
土坝裂缝观测时, 应先对裂缝进行(), 分别观测裂缝的位置、 走向、()、 宽度及()等项目。
管子码放不宜超过几米?
Can you tell us more ___ (precise)what happened last night?