气硬性胶凝材料只能在空气中硬化,水硬性胶凝材料只能在水中硬化。
参考答案:错
-Where's your brother now , Bob?
-I saw him in the street a moment ago and I told him ________. [ ]
A. playing; don't do so
B. playing; not to do so
C. play; to do so
()是指在开工前作出现场材料管理计划,参与施工组织设计的编制,规划材料存放场地、道路、做好材料预算,制定现场材料管理目标。
A.全面规划
B.计划进场
C.控制领发
D.准确核算