All the employees of the company received a(n) _____ of $ 200 apart from their salary at the end of the

year to celebrate our traditional Spring Festival. [ ]

A. advantage

B. reward

C. bonus

D. fare

不回收原支护托盘会造成哪些伤害？（）

A、隅角顶板不跨落，空顶面积大

B、危矸活石伤人

C、通风阻力大