说明：  问题描述： 现要开发一个开放式的高校本科招生最低录取分数线的查询系统，供师生和学生家长等查询，高校自愿放入该校的信息，可能随时有高校加入。 功能要求： 要求实现的查询功能有： (1) 查询等于用户给定分数的高校； (2) 查询大于(或小于)用户给定分数的高校； (3) 查询最低录取分数线在用户给定的分数段中的高校。
(Description: Now want to develop a Open University undergraduate enrollment lowest to admit fractional line of inquiry system for the teachers and students, parents, such inquires into the college voluntarily, may at any time. University Functional requirements: Requirement: the query achieve (1) the scores query is given the user universities (2) (or less) than inquires the university user given scores (3) inquires the lowest to admit fractional line in the universities of band user is given.)