单项选择题
如图1-2所示为某楼梯TB1结构,从图中可知:
A.9 B.10 C.11 D.12
A.DN50 B.DN32 C.DN20 D.DN40
A.3 B.5 C.10 D.12
A.DN50 B.DN32 C.DN25 D.DN40
A.DN32 B.DN50 C.DN25 D.DN40
A.20片 B.14片 C.13片 D.21片
A.单 B.双 C.三 D.四
A.200 B.100 C.250 D.120
A.6 B.8 C.12 D.14
A.1265 B.1135 C.2400 D.2600
A.直接费 B.间接费 C.措施费 D.利润 E.税金