【多选题】【消耗次数:1】
开发决策支持系统需要的条件包括( )。
A.基础数据
B.研发人员
C.模型库
D.硬件软件设备
参考答案:
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①  must;can;must;his
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【单选题】 It was getting dark. I found a car________in a pool by the side of the road.
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【单选题】 ________the front door________,he had to enter the room through the back door.
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