搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某企业施工需要一种材料，其单价为200元／吨，一次订货总成本为400元，每吨材料的年平均储备成本为1元。已知该材料的经济采购批量为800吨，则该企业该种材料的年度采购总量为（）吨。

A．2400

B．1600

C．800

D．400

答案

参考答案：C

解析：

根据经济订货批量的计算公式：Q2=2KD/K2

8002==2×400×D/1

D=640000/800=800

单项选择题

A Bluetooth device can be either a master or a slave and any of the devices within a (1) can be the master. There is only one master and there can be up to (2) active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to (3) parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to (4) mode before it can become active. Within a network, all (5) communications are prohibited.

2（）

A．7

B．15

C．63

D．255
查看答案
问答题 简答题

哪些公路和桥梁不得进行超限运输？
查看答案