破碎方式是指破碎力对被破碎的（）的作用方式和方法。
A、矿石
B、物料
C、岩石
D、尾矿
参考答案：B
His conduct at the conference is regarded as being _____ unacceptable. [ ]
A. notably
B. firmly
C. seriously
D. totally
报关员代表所属单位向海关办理报关业务时，只能担任其所属报关单位的报关工作。
