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Due to a constantly(66) environment, a poor understanding of the user's needs and preferences, as well as a(67) of willingness to modify.(68) organizational structures and decision models, the full economic potential of Web Information Systems (WIS) has not been realized by now. The data object types of the(69) meta. model, the Extended World Wide Web Design Technique (eW3DT), provide hypertext designers(70) a conceptual, user-centric framework and graphical notation for the construction of both,(71) and customized models, during the software development(72) of commercial WIS. A reference model as a normative concept represents an abstraction of a(73) company, its functional units, or its Web Information System and is intended to streamline the design and implementation of complex applications at(74) costs. As precondition for pursuing a partial globalization strategy,eW3DT(75) between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.
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在软件的开发过程中常用图作为描述工具。如DFD就是面向(33)分析方法的描述工具。在一套分层DFD中，如果某一张图中有N个加工 (Process)，则这张图允许有(34)张子图。在一张DFD图中，任意两个加工之间(35)。在画分层DFD时，应注意保持(36)之间的平衡。DFD中从系统的输入流到系统的输出流的一连串连续变换形成一种信息流，这种信息流可分为(37)。
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听力原文： The slow stretches and meditations of yoga don't bum calories like a nm on the field. But a new study suggests it might help people keep weight off in middle age.
Researchers found that overweight people in their 50s who regularly practiced yoga lost about five pounds over 10 years, while a group in the same age range gained about 13.5 pounds over the same period.
The link between yoga and weight loss has nothing to do with burning calories. Except for very vigorous yoga practices, you don't really burn enough energy to make any difference in terms of weight. Instead, yoga helps keep people more in tune with their bodies and eating habits and aware of bad habits, such as eating because of stress, boredom or depression.
The researchers collected data from 15,500 people between the ages of 53 and 57 who were asked about exercise, weight, health and diet histories. The findings showed that those who practiced yoga tended to avoid junk food and overeating because they wanted to respect their bodies.
Some yoga trainers said it's difficult to eat heavily and do yoga. Doing certain movements does not work with a slice of pizza.
Scientists called the research encouraging, but said it's difficult to prove a direct influence from a single study.
Most yoga fans say weight loss is just an added bonus from the disciplined form. of meditation,controlled breathing and prescribed postures.
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A．It helps the harmony between human body and eating habits.B．It is to lose extra weig
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