根据实践经验,一般当楼面荷载较大,建筑平面接近_____,跨度小于_____时,采用钢筋混凝土现浇双向板楼盖比单向板楼盖较为经济。
A.正方形;10m
B.正方形;5m
C.长方形;10m
D.长方形;5m
正确答案是B
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