决策支持系统是()
A.完成事中控制
B.完成时候核算
C.完成事前辅助决策
D.完成事前预测、事中控制和事后核算
参考答案:C
—Could you please open the window?
—Sorry, but I______. [ ]
A. feel hot
B. have got a cold
C. at work
D. work off
报警画面上出现"16:02:14PIC-9",在点名上出现反白,是什么原因?