【单选题】The young man earns $20,000 a month.In other words,his annual________is $240,000. [ ]
【简答题】Roger Walker's company wants to give him responsibility for his firm's annual profit-and-loss account and balance sheet.
【判断题】用系统观点来研究物流活动是现代物流的科学的核心问题。 【 】
【判断题】用系统观点来研究物流活动是现代物流科学的核心问题。()