【单选题】()是回归分析中常用的一种方法,选用历史时期的运量和运输成本费用资料,利用模型y=a+bx预测未来成本费用变化。
【单选题】( )适用于对单个分销中心或工厂的选址,它是一种用于寻找将运送费用最小化的配送中心的数学方法,该方法将市场位置,要运送到各市场的货物量、运输成本都加以考虑。
【简答题】翻译: No one can doubt the essential fact that the traffic problem over the last years has caused wide public concern all over the world. Experts in increasing numbers are beginning to believe that such...
【简答题】No one in my family could believe Allegra had any disability, much less one as severe as hers. To them a disability was physical, something you could see. They knew her as a happy, normal child. That'...
【简答题】已知集合A={1,2},集合B满足A∪B={1,2},则集合B有______个.
【单选题】He walked along in the shadows, hoping no one would ________ him.