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原型化(Prototyping)方法是一类动态定义需求的方法， 42 不是原型化方法所具有的特征。与结构化方法相比，原型化方法更需要 43 。衡量原型开发人员能力的重要标准是 44 。
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The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of 3 and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive 4 which is concluded with a well-defined 5 and can be further broken down into 6 - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group 7 logically by nature.
某幅图像具有640×480个像素点，若每个像素具有8位的颜色深度，则可表示(a)种不同的颜色，经5:1压缩后，其图像数据需占用(b)(Byte)的存储空间。 数字证书的内容不包括______。
The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of 3 and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive 4 which is concluded with a well-defined 5 and can be further broken down into 6 - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group 7 logically by nature. 关于数据库设计说法不正确的是 。
Networks can be interconnected by different devices. In the physical layer, networks can be connected by 20 or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept 21 ,examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have 22 network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message 23 . As an example, gateways between Internet e-mail and X.400 e-mail must 24 the e-mail message and change various header fields.
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