He used an elective system, replacing the stereotype of classical courses, students can pursue their professional interest.

他采用选修制，取代了刻板的古典课程，学生们可以攻读他们感兴趣的专业。

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In this paper we deal with some security techniques applied to network elective system and the construction of an elective database.

介绍了一种可行的网上选课系统的规划、流程以及所采取的安全技术。

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NET technology, simply describes an online elective function of the system and related technology.

NET技术的网络选课系统的开发过程，简述网上选课系统的功能和相关的技术实现。

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