每个角都有一个（ ），两条（ ）。
顶点；边
— I'm sorry to keep you waiting. l'll make shorter work of this.
— __________.I'm not in a hurry.[ ]
A. Take it easy
B. Take your time
C. That's all right
D. Do as you please
采用搁置法安装明龙骨饰面板时应留有板材安装缝，每边缝隙不宜大于（）。
A．1mm
B．1cm
C．2mm
D．2cm
