题目内容
设有职工EMP(职工号，姓名，性别，部门号，职务，进单位时间，电话)，职务JOB(职务，月薪)和部门DEPT(部门号，部门名称，部门电话，负责人)实体集。一个职务可以由多个职工担任，但一个职工只能担任一个职务，并属于一个部门，部门负责人是一个职工。下图所示的a、b处的实体名分别为(24)；图中a、b之间为(25)联系。
查看答案
搜索结果不匹配？点我反馈
更多问题
以静态或动态的连接方式，为应用程序提供一组可使用的类。(15)除了提供可被应用程序调用的类以外，还基本实现了一个可执行的架构。
He______English for eight years by the time he graduates from the university next year.
听力原文：Are you looking for a driving school that offers quality service at reasonable rates？ Look no further! The Aston Driving School now offers a special program to new learners. You will receive a 15% discount if you sign up for a 4-week class any time this month. Our instructors are patient, experienced and dependable. We use vehicles that are well maintained and fully insured. Our 4-week course for beginners includes classroom sessions that deal with traffic law, safety and basic car maintenance, as well as behind the wheel training. For more details or to register for a course, call us at 123-4488.
Who is this advertisement for？
How can listeners avoid heavy traffic？
微信支付 
支付宝支付