College are always a lot of public elective courses, course selection is past registration Quiz. Although this method directly, but caused blindness in course selection, course selection when some classes are overcrowded, some classes no one elective. The reason is the traditional elective method is not predictable, we do not coordinate well in advance. Yi Hou used an online course selection system, available on the Internet before the commencement of elective, each student before course commencement on the identification of good, do not waste energy to course selection, also can make the teaching resources Heli evenly distributed.

数据库系统概论第四版课后题答案.doc

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