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I believe many people want to know about the simulation of computer information management and the recruitment of clinical medical expertise in health institutions. After collecting and sorting out, Medical Education Network has specially sorted out the following contents, hoping to help you!

1, stem: At present, the three basic data models are

A-level model, network model and relational model

B grid model, relational model, object model,

C network model, relational model and object-relational model.

D-level model, relational model and tree model

Reference answer: a

Analysis: At present, the three basic data models supported by data port management system are hierarchical model, grid model and relational model.

2, stem: describe the basic technical parameters of data communication in the computer network is the data transmission rate and ().

quality of service

transmission delay

error rate

Response time

Reference answer: C.

Analysis: There are two basic technical parameters to describe data communication in computer network: data transmission rate and bit error rate.

3.Stem: If the field values of the established index cannot be duplicated and only one can be created in a table, it should be.

Main index

B unique index

Candidate index

D. general index

Reference answer: a

Solution: Both the primary index and the candidate index can be guaranteed not to be duplicated, but if only one can be created in a table, only the primary index can be created.

4. Title: WAN covers a geographical range from tens of kilometers to thousands of kilometers. Its communication subnet mainly adopts ().

An information exchange technology

packet switching technology

C file exchange technology

Circuit switching technology

Reference answer: b

Analysis: The communication subnet of WAN mainly uses packet switching technology to interconnect local area networks or computer systems distributed in different regions to achieve the purpose of resource sharing.

5. The events that all base classes can recognize are

Click.

B load

Interactive change

D initialization

Reference answer: D.

Parse: When an object is created, the Init event is activated. So all base classes can recognize Init events, so the correct choice is D.

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