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[单选题]
对于m个发点、n个收点的运输问题，叙述错误的是( )
A
该问题的系数矩阵有m×n列
B
该问题的系数矩阵有m+n行
C
该问题的系数矩阵的秩必为m+n-1
D
该问题的最优解必唯一
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试题答案：
D
答案解释：
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某公司拟对新产品生产批量作出决策，现有三种备选方案，未来市场对该产品的需求也有三种可能的自然状态，收益矩阵如题32表。试以最小最大遗憾值决策标准作出最优生产决策。
马尔柯夫分析的一个有趣的事实是：不管各式各样的生产者和供应者一开始占有的市场份额如何，只要转移概率的矩阵保持不变，则最终______总是一样的。
EOQ模型用于解决管理中的( )
在库存管理的ABC分析法中，对A类货物的管理可以( )
某商店在夏天炎热程度未知情况下，决定是否大批量购进空调设备，这是在___________条件下的决策问题。如果预计天气非常炎热的概率为40%，这是___________条件下的决策问题。
根据库存管理理论，对于具有特殊的作用，需要特殊的保存方法的存货单元，不论价值大小，亦应视( )
计算公式不正确的是( )
在求最大流量的问题中，已知与起点相邻的三节点单位时间的流量分别为10，12，15，则终点单位时间输出的最大流量应( )
在供需平衡的运输问题中，供应点的个数为m，需求点的个数是n，若以西北角法求得其初始运输方案，则该方案中空格的数目应为( )
某设备公司每年按单价25元购入54000套配件。单位库存维持费为每套6元，每次订货费为20元。试求该公司最佳订货批量和全年最佳订货次数。
热门试题
1.
根据以下材料，回答48-51题
2.
4. Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a 7 week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps a minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject was taken had recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day's ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding.At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses were taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.(5分)4.1How many people were in each group?____(1分)A. 100.B. 50.C. 25. D. 15.
3.
87. 下列属于总量指标的有（ ）。（1分）
4.
1.设计稿
5.
会计报表质量分析是揭示各期企业经济行为的性质和发展方向。（）
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