A.1/2;2 B.1/3;2 C.1/2;3 D.1/3;3
A.提前1~2天;提前1~2天 B.提前1~2天;砌筑當(dāng)天 C.砌筑當(dāng)天;提前1~2天 D.砌筑當(dāng)天;砌筑當(dāng)天
A.250mm B.300mm C.350mm D.400mm