单项选择题
A.4mB.5mC.6mD.8m
A.50×4 B.50×5 C.60×6 D.70×6
A.30°~40° B.35°~45° C.35°~50° D.40°~60°
A.40~60cm B.45~65cm C.50~70cm D.55~75cm
A.1m B.1.2m C.1.3m D.1.5m
A.18mB.20mC.24mD.28m
A.35cm B.40cm C.45cm D.50cm
A.600mmB.500mmC.400mmD.250~300mm
A.应在两端按规定设置连墙件和横向斜撑加固 B.可不设加固措施 C.不必设连墙件 D.设置卸荷措施
A.100mm B.80mm C.50mm D.200mm
A.不宜小于3跨和小于50mm B.不宜小于2跨和小于50mm C.不宜小于2跨和小于30mm D.不宜小于3跨和小于30mm