The older New England villages have changed relatively little()a gas station or two in recent decades. ["except for","in addition to","except","beside"]
应制定施工区域(),排水不得破坏相邻建(构)筑物地基和挖、填土石方边坡。 ["排水沟","临时排水方案","排水管渠","给排水系统"]
硅酮建筑密封胶按用途分为G类、F类。
防水涂料按介质不同,又可分为乳液型、溶剂型和憎水型三类。
现场钢构支架、水泥杆堆放不得超过(),堆放地面应平整坚硬,杆段下面应多点支垫,两侧应掩牢。 ["一层","二层","三层","四层"]
随着人类文明的发展、科学的进步,辐射问题越来越受到人们的重视。如果人一次受到1万毫雷姆,虽然不会感到有任何症状,却会伤害人的骨髓。请问,一次X光检查,给人体胸部造成的辐射是多少雷姆?