单项选择题
A.50mm B.300mm C.150mm D.250mm
A.98%、95%、95%、87%、92% B.97%、95%、95%、88%、92% C.98%、96%、92%、88%、95% D.97%、96%、92%、87%、92%
A.门窗洞口处 B.纵横墙交界处 C.窗间墙处在 D.十字墙处