磨削有何用途？
参考答案：
可消除板面焊疤边缘的毛刺，修磨焊缝以及对受压容器的焊缝再探伤检查前进行打磨处理。
—To keep healthy, you'd better eat more vegetables and fruits every day.
—Thanks for your advice. I'll have more _________. [ ]
A. cakes
B. eggs
C. apples
D. candies
试论北魏孝文帝改革。
