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● 每个线性规划问题需要在有限个线性约束条件下,求解线性目标函数 F 何处能达到极值。有限个线性约束条件所形成的区域(可行解区域),由于其边界比较简单(逐片平直),人们常称其为单纯形区域。单纯形区域D可能有界,也可能无界,但必是凸集(该区域中任取两点,则连接这两点的线段全在该区域内),必有有限个顶点。 以下关于线性规划问题的叙述中,不正确的是 (63) 。
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● POP3协议采用 (65) 模式,当客户机需要服务时,客户端软件(Outlook Express或FoxMail)与POP3服务器建立 (66) 连接。
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● 当数据在两个VLAN之间传输时需要哪种设备? (68)
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● 多方多媒体会话控制组(IETF 的一个工作组)制定了一组会话控制协议来服务互联网上的多媒体应用。其中 (69) 来描述会话包含的媒体类型。
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● (70) 是与IP 协议同层的协议,可用于互联网上的路由器报告差错或提供有关意外情况的信息。
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● An Enterprise Resource Planning (ERP) is built upon a commercial (71) that promises the seamless (72) of all the information flowing through the company ─ financial, accounting, human resources, supply chain and customer information. In implementation, all ERP systems include several features. The system is installed on a typical database management system. It requires initial setup according to the organization’s process, but it may be (73) according to the organization’s unique process requirements through a tool set contained within the ERP applications. Using ERP, (74) can be prescribed to automate approval processes through established chains of command. One of the methods used to effect rapid implementation of the ERP system is to conduct concurrent (75) sessions during the early stages of ERP implementation.