珩磨
参考答案：
是用磨粒很细的油石在一定压力下，以低速对工件表面进行的精整`光整的加工方法，多用于加工圆柱孔
She is a , and she works at a restaurant.[ ]
A. clerk
B. businesswoman
C. waitress
You must ___ food and clothes to those who have suffered from the heavy floods.
A．supply
B．offer
C．give
D．provide
