题目内容

(66) method is the use of a data processing system to represent selected behavioral (67) of a physical or abstract system. For example, the representation of air streams around airfoils at various velocities, temperatures, and air pressures with such a system.Emulation method is slightly different, it uses a data processing system to imitate another data processing system, so that the imitating system accepts the same data, executes the same programs, and achieves the same (68) as the imitated system. Emulation is usually achieved (69) hardware or firmware. In a network, for example, microcomputers might emulate terminals (70) communicate with mainframe. (66)处填()。

Assembly
B. Simultaneity
C. Fraud
D. Simulation

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ISO/IEC 9126软件质量模型由()几个层次组成。

A. 质量、功能、过程
B. 成熟性、容错性、易恢复性
C. 质量特性、质量子特性、度量指标
D. 质量特性、时间特性、资源特性

在网络互连中,实现高层互连的设备是______。

设循环队列的结构如题33。若有一个Queue类型的队列Q,计算队列元素个数应该用()。

A. (Q.rear-Q.front+ MaxSize)%MaxSize;
B. rear-Q.front+1;
C. rear-Q.front-1;
D. rear-Qfront;

In information theory, "information" is regarded as knowledge which reduces or removes (71) about the occurrence of a specific event from a given set of possible events. The concept "event" is to be understood as used in the theory of probability. For instance, an event may be the occurrence of a (72) character or word in a given message or in a given position of a message.In communication theory, channel is defined as that part of a communication system that connects the message source with the message sink. An encoder may be inserted between the message source and the input to the channel, and a (73) between the output of the channel and the message sink. Generally, these two units are not considered as being parts of the channel. In certain cases, however, they may be considered as pans of the message source and message sink, (74) . In information theory (75) to Shannon, the channel can be characterized by the set of conditional probabilities of occurrence of all the messages received at the message sink when a given message emanates from the message source. (75)处填()。

A. based
B. following
C. according
D. subject

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