吊篮四周护栏高度不低于（），底部边缘应设臵不低于（）的踢脚板，避免高空坠物；吊篮底部应铺设（），必须进行固定且不允许有（）。

t whtge do children strt school in your country M:t five. Howbout in your country W:t six. Do boysnd girls go to school together M: Yes, they do.nd I think it’ s good ide. W: Do some children go on to university M: Yes, they do. W: Wht exmintions do they tke first M: ’O’ levelsnd ’’ levels. W: Oh, but in our country they tke ’O’ levelsnd ’H’ levels. How long do they usully styt university M: Three or four yers. When do children strt school in the mn’s country t seven. B．t six. C．t five.A．At seven．B．At six．C．At fivE．