The entity-relationship（E-R）data model is based on a perception of a real world that consists of a clletion of basic objects,called（ ），and of relationships among these objects.An entity is a“thing”or"object"in the real world that is distinguishable from o

A、A connotative meaning of a word

B、A cognitive meaning of a word

C、Denotative meaning of a word or a lexical item

D、Collocations

It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question．(71)is a means to capture ideas, relationships, decisions, and requirements in a well-defined notation that can be applied to many different domains. Modeling not only means different things to different people, but also it can use different pieces of UML depending on what you are trying to convey. In general, a UML model is made up of one or more(72)A diagram graphically represents things, and the relationships between these things. These(73)can be representations of real-world objects, pure software constructs, or a description of the behavior. of some other objects. It is common for an individual thing to show up on multiple diagrams; each diagram represents a particular interest, or view, of the thing being modeled. UML 2.0 divides diagrams into two categories: structural diagrams and behavioral diagrams．(74)are used to capture the physical organization of the things in your system, i.e., how one object relates to another．(75)focus on the behavior. of elements in a system. For example, you can use behavioral diagrams to capture requirements, operations, and internal state changes for elements.

A．Programming

B．Analyzing

C．Designing

D．Modeling

Object-oriented DBMS integrated a variety of(81)data types-such as business procedures, graphics, pictures, voice and annotated text.Object orientation also makes a(82)to application development efficiency. It makes the data, functions, attributes, and relationships an integral part of the(83). In this way, objects can be reused and replicated.Some leading RDBMS vendors support the concept of integrating object management capabilities with their current line of relational products. That capability enable users to the development cycle, since integrity logic and business roles no longer need to be programmed(84)each application.

A．tool

B．in

C．idea

D．contribution

E．real-world

System analysis is traditionally done top-down using structured analysis based on (71) ．Object-oriented analysis focuses on creation of models．The three types of the analysis model are (72) ．There are two substages of object-oriented analysis． (73) focuses on real-world things whose semantics the application captures．The object constructed in the requirement analysis shows the (74) of the real-world system and organizes it into workable pieces． (75) addresses the computer aspects ofthe application that are visible to users．The objects are those which can be expected to vary from time to time quite rapidly．

（71）

A．functional decomposition

B．object abstraction

C．data inheritance

D．information generalization

analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the(72)for designing and constructing an improved system.(73)is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called(74).(75)is another such technique that integrates data and process concerns into constructs called objects.

A．Prototyping

B．Accelerated

C．Model-driven

D．Iterative

The basic concept of a data(72)is the difference between data and information.

A．warehouse

B．storage

C．base

D．service

（ ）is used to model aggregates of information and the relationships these aggregates have to other.

A.Data flow diagram B.Entity relationship diagram C.Sequence diagram D.Structure diagram