【单选题】We are sure that you will find a ready sale ____ this type of new product.
【简答题】ABC Co. Ltd. Gentlemen, We are sure that you would be interested in the new 'Changling' Vacuum Cleaner which is to be placed on the market soon. Most of the good points of the earlier types have been ...
【简答题】When you go () the details, we are sure that you will find many popular items which sell fast () your local markets.
【单选题】We are sure that you will find a ready market for this quality product, and your customers will be well satisfied it.
【单选题】We are sure that you will ________ our products.
【单选题】关于足细胞的说法下列哪项是错误的 (1分)
【判断题】关系模型的关系运算是以关系代数为理论基础的,关系代数最基本的操作是并、差、笛卡儿积、投影、选择。
【单选题】下列哪些运算是关系代数的基本运算( )。 A. 交、并、差 B. 投影、选择、除、联结C. 联结、自然联结、笛卡尔乘积 D. 投影、选择、笛卡尔乘积、差运算