By working slowly but surely towards your goal, you'll___________succeed. 

A. eventually       B. accidentally       C. occasionally         D purposely

实物流是指库存物品在仓库内外的流动，按作业流程的先后顺序，主要包括接运、验收、保管、保养、加工、分拣备货、包装、集货、发运、配送等环节。( )