【判断题】在数据库的E-R 概念模型中。实体集之间只能存在“一对一”或“一对多”联系。
【简答题】汽油车的排放物通常有以下四个来源:油箱、燃油喷射系统、曲轴箱通风、排气系统。
【单选题】AStaying up all night, Tom Bfinished not only the homework Cbut also read many poems of his Dfavorite poets.
【简答题】A young girl sits at her desk, reviewing her homework for the evening. English: Read three chapters and write a report. Math: Complete 30 problems. Science: Do a worksheet, front and back. French: (A)...
【判断题】在数据库的 E-R 概念模型中。实体集之间只能存在 “ 一对一 ” 或 “ 一对多 ” 联系。 ( 2016 )
【判断题】在数据库的E-R 概念模型中。实体集之间只能存在“一对一”或“一对多”联系。
【单选题】(Staying up) all night, Tom (finished not only) the homework (but also read) many poems of his (favorite) poets.
【单选题】Would you please ______ me of that important appointment with Jane this Sunday?
【单选题】If you let me make a choice ______ Jane and Anne, I would say Jane is______one to be my assistant.
【单选题】(Staying) up all night, Tom (finished not only) the homework (but also read) many poems of his (favorite) poets.