拌制混凝土时有什么要求?
参考答案:要拌和均匀,颜色一致,严格控制水灰比。
A.the names of his clients
B.the addresses of his clients
C.the requirements of his clients
D.the telephone numbers of his clients
水泥混凝土面层的施工中的第一道工序是()
A.施工放样
B.表面整修
C.混凝土的拌合
D.混凝土的养生与填缝