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【简答题】
某企业每年耗用某种材料3600千克，该材料单位成本10元，单位存储成本为2元，一次订货成本为25元，不允许缺货。假设该商品的进货可以随时实现，根据经济订货量模型，每次进货多少能使总费用最少？______。 (A) 424千克 (B) 400千克 (C) 190千克 (D) 300千克
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举一反三
【简答题】Main idea of Part 1: The husband the interracial marriage on the ground of differences while the wife on the ground of .
【多选题】前馈控制的特点有()?
A.
开环控制，独立的前馈难以使用；
B.
根据干扰的大小控制，干扰必须可测；
C.
只对设计补偿的干扰起作用；
D.
调节规律由对象、干扰特性决定；
【单选题】The demand for salt is inelastic and the supply of salt is elastic. The demand for caviar is elastic and the supply of caviar is inelastic. Suppose that a tax of $1 per pound is levied on the sellers ...
A.
sellers of salt and the buyers of caviar.
B.
sellers of salt and the sellers of caviar.
C.
buyers of salt and the sellers of caviar.
D.
buyers of salt and the buyers of caviar.
【单选题】Which of the following reasons CANNOT explain why Meredith Vieira was on the list of the 100 most powerful women in the world?
A.
Because she's going to be taking the role of the Today Show from Wednesday.
B.
Because she's accomplished a lot over the course of her many years in this profession.
C.
Because she's going to be so influential in what she does.
D.
Because she is an award-winning newswoman, and she's spent nine years on the view.
【简答题】下列矩阵中,是对称矩阵的是( )A. B. C. D.
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