What is the role of the DataReader class in ADO.NET connections?(DataReader在ADO.NET连接中起到什么样的角色)

[单选题]What role does the teacher play at the feedback stage?A.Assessor.B.Promoter

[单选题]What role does the teacher play at the feedback stage?A.Assessor.B.Promoter

[单选题]What role does the teacher play in the deductive presentation of grammar?A.

[问答题] DataReader/DataSet区别

[主观题]D．ataReader和DataSet的异同

[问答题] DataReader与Dataset有什么区别？

[主观题]D．ataReader与Dataset有什么区别？

[单选题]关于DataReader对象，下列说法正确的是（）。A . 可以从数据源随机读取数据B . 从数据源读取的数据可读可写C . 从数据源读取只前进且只读的数据流D . 从数据源读取可往前也可往后且只读的数据流

[试题](a) Contrast the role of internal and external auditors. (8 marks)(b) Conoy Co designs and manufactures luxury motor vehicles. The company employs 2,500 staff and consistently makes a net profit of between 10% and 15% of sales. Conoy Co is not listed;

[单选题]Parents are encouraged to be role models for their kids because______.A．parents love to createB．parents can draw straight linesC．children tend to follow their parents' examplesD．children like the product of their parents' creativity