A charity campaign to offer care to the elderly in our city attracted many participants on March 5 ----“Learn from Lei Feng Day”, a day _________ to honor the spirit of helping others.

A．set off

B．set about

C．set aside

D．set out

采掘工作面常用的矿图有（）、地质剖面图，综合地层柱状图，主要巷道平面图。

A、采掘工程平面图、地形图

B、采掘工程平面图、井上下对照图

C、井上下对照图、辅助运输系统图

D、采掘工程平面图、施工巷道设计图