单项选择题 根据杜能区位理论，某个农业经营者是否能在单位面积土地上获得最大利润，将由农业生产成本、农产品的市场价格和（）三个因素所决定。

单项选择题 A．memoryB．CPUC．I/O deviceD．program

单项选择题 M: Would you conduct the meeting for me this afternoon?W: I would ff I could, but I can’t. I have to leave for Chicago on business this afternoon and will not be back until next week.Q: What did the woman say?（）