搜题请搜索小程序“爱下问搜题”
问题 单项选择题

 

(一)

金都公司是国内一家大型制造企业，为了便于商品的销售，他们将产品存放在分布于全国各地的12个分拨中心，每个分拨中心都建有仓库和自己的车队，为其所在的整个地区提供销售服务。大批量运输使得工厂能以经济批量进行生产。各工厂按周计划生产，尽量减少按月计划生产所出现的预测误差，降低误差的影响。

各分拨中心每种产品的基本库存水平是在历史销售水平的基础上确定的。如果是新产品，就根据目标客户及其估计销量来确定存储地点。

金都公司用商品完好率来衡量其运营业绩，并将其简称为客户服务。分拨中心DRP系统是其效率的充分保证。

请结合以上案例回答下列问题：

 

金都公司在N地现有9个仓库，总库存量价值为1500万元，金都公司要求通过增加仓库数量将总库存量价值控制在2000万元。根据库存的平方根定律，仓库数量应增加为（）个。

A．16

B．25

C．18

D．36

答案

参考答案：A

解析：

库存的平方根定律解释了如果减少仓库的数量，货主的安全库存就会在总体上大幅度减少。这个定律揭示了未来仓库数量产生的总库存等于未来仓库数量与现有仓库数量二者商的平方根与现有总库存的乘积。根据公式，代入数据可得：2000=，解得n2=16。

搜索
阅读理解
阅读理解。
     Do you know all birds protect themselves by always listening and watching out for danger? At the
smallest sign of it, they will fly away. Birds that cannot fly are often able to swim fast, or run quickly.
Some birds make themselves look bigger and more dangerous by fluffing (抖动) their feathers.
     Another important protection for many birds is their colors. Their feathers often have colors that match
the things around their nests (巢). Some birds change colors with the seasons. In the winter they are white
to match the snow. In the summer they are brown to match the ground.
     People sometimes kill birds without meaning to. When people cut down forests to build houses and
factories, they destroy the homes and food of birds. If the birds have nowhere else to go and nothing to eat,
they will die out.
     Pollution may cause some birds to die. Birds that eat fish from polluted water get poison in their bodies.
Then they cannot lay healthy eggs. New birds can't be born.
     Now people protect birds passing the laws to control hunting and pollution, by setting up some special
parks where all the birds are safe from hunters, and by teaching people to care about birds rather than kill
them.
How do birds protect themselves?By 1______.
By fluffing their feathers.
By having colors that match the things around their nests.
By changing 2______.
Why do some birds die out?People sometimes kill birds without meaning to.
3______. may cause some birds to die.
4______? By passing the laws to control hunting and pollution.
By setting up 5______.
By teaching people to care about birds.
查看答案
多项选择题

常用的吸声材料包括（）。

A.无机材料

B.有机材料

C.多孔材料

D.无孔材料

E.纤维材料
查看答案