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[单选题]
在软件开发过程中，直接与变更要求关联的界面是( )
A.分析界面
B.编程界面
C.用户界面
D.管理界面
A
B
C
D
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试题答案：
D
答案解释：
相关题目
在Rational Rose建模的逻辑设计中，使用的图是 ( )A.活动图B.顺序图C.状态图D.关联图
在软件开发过程中，描述数据内容的概念模式是（）
数据流程图的基本元素是外部实体、数据处理与 _______，用箭头表示信息的流动状况。
在地铁售票信息系统开发的需求分析阶段使用的图表是（）
为创建一个C Project，在C Project窗口选择C语言相关属性后，单击的按钮是( )A．Back B．NextC．Finish D．Cancel
以下选项是一体化的软件开发工具的是（）
多选题 项目负责人不必考虑的问题是（）
关于软件开发工具发展轨迹图的叙述不正确的是（）
进入二十一世纪以来，软件开发工具的发展有两个鲜明的特点，第一个特点是面向网络，另一个特点是______ 的兴起和运用。
单选题 不属于SAA对外系统的通信接口提供的功能是（）
热门试题
1.
4．以下叙述中正确的是
2.
建筑企业成本管理的主体内容是________管理。
3.
38．1987 年召开的中共十三大提出了（ ）
4.
21．下列关于回购协议表述正确的是【 】
5.
3.Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)3.1Friction arises when____.(1分)A. an opposing force of motion existsB. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
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