单项选择题
A.25° B.26° C.28° D.30°
A.20~30mm B.30~40mm C.10~30mm D.20~40mm
A.20~30mm B.30~40mm C.40~80mm D.40~13mm
A.12~15mm B.15~20mm C.20~25mm D.30~50mm
A.0.5m B.1m C.1.5m D.1.8m
A.30mm B.60mm C.120mm D.180mm
A.横墙 B.纵墙 C.承重墙 D.非承重墙
A.窗墙 B.门窗墙 C.窗间墙 D.承重墙
A.80mm B.100mm C.120mm D.150mm