【单选题】( )是指在一个给定的数量和位置的需求集合和一个候选设施位置的集合下,分别为多个设施找到合适的位置并指派每个需求点到一个特定的设施,使之达到供应方和需求点之间的运输费用总和最低。
【单选题】She refused to _________ the door key to the landlord until she got back her deposit.
【单选题】He's earning as much money as possible now______ he can retire early.
【单选题】She refused to ______the door key to the landlady until she got back her deposit.
【单选题】“教师对教学内容有广泛深入的了解”,是评价教师教学质量中的