________,businesses offer services for which they charge a fee that is based on the number of transactions they process.
A. In the fee-for-transaction revenue model
B. In the web catalog revenue model
C. In the traditional catalog-based retail revenue model
D. In the advertising-supported revenue model
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Stated more formally,an object is simply ________ of a class.
A. a part
B. a component
C. an instance
D. an example
下列原因中,承包商不能提出工期索赔的情况是______。
A. 承包人遇到不利物质条件
B. 发包人提供的材料和工程设备不符合合同要求
C. 发包人要求向承包人提前交付材料和工程设备
D. 监理人对隐蔽工程重新检查,经检验证明工程质量符合合同要求的
结构化分析方法是一种________,也是一种建模活动,适用于分析大型数据处理系统。
A. 面向数据流的设计分析方法
B. 面向对象的需求分析方法
C. 面向数据流的需求分析方法
D. 面向对象的设计分析方法
________ is a list of items that are accessible at only one end of the list.
A tree
B. An array
C. A Stack
D. A queue