判断题
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