高层钢结构安装主要在于控制每节柱子吊装后的()
A.垂直度
B.标高
C.柱底中心与顶位轴线的偏差
D.每节柱之间的偏差
参考答案:A, B, C
运输成本不包括()
A.机会成本
B.变动成本
C.固定成本
D.管理费用
---Could you tell us __________ ?
---About two weeks.
A.how often are we going to be away
B.how often we are going to be away
C.how long are we going to be away
D.how long we are going to be away