5. 已知ds 为数据集对象.以下语句的作用是_____. ds.Tables[";Product"].Constraints.Add( new UniqueConstraint("UC_ProductName",new string[]{"Name","Class"},true)); A. 为表";Product"添加一个由列"Name","Class"组合成的主键约束 B. 为表";Product"...
20. The US is the world’s leading exporter of agricultural products, in which the second most important export is (). A. Cotton B. vegetable oils C. cereal grains D. soybeans ...
7. A matrix organization is cost-effective for work on new products. A. 错误 B. 正确 ...
10. Your letter ( ) October 20 shows your interest in our products. A. of B. with C. on D. as of ...
20.(2.5分) In which of the following culture prestigious products and brands find lucrative markets? A、Femininity B、Masculinity C、Individualism D、Collectivism ...
(判断题)14: The key to survival in monopolistic competition lies in product differentiation. A: 错误 B: 正确 ...
(单选题)29: Boys being what they are;an occasional prod in the rear is ___. A: no such a bad thing B: no a such bad thing C: no such bad thing D: not such bad thing ...
(单选题)32: This company provides a very good( )service for its products. A: maintenance B: merit C: philosophy D: pigeon ...
(单选题)4: In order to increase our output, we need to import more production ____. A: facilities B: hens C: votes D: artists ...
(单选题)2: prod . A: lose one’s heart B: mock ,condemn C: to strongly encourage someone ...