优等品烧结多孔砖是指不允许出现最大破坏尺寸（）的爆裂区域。
A．大于1mm
B．大于1.5mm
C．大于2mm
D．大于2.5mm
参考答案：C
眼眶内壁由哪些骨构成()
A．颧骨
B．筛骨
C．上颌骨
D．蝶骨
E．泪骨
The Japanese suffering from the worst natural disasters .
A．are; ever since
B．are; of all time
C．is; ever since
D．is; of all time
