以下选项中，（ ）对象用于与数据源建立连接。
- A.Command
- B.Connection
- C.DataReader
- D.DataAdapter
正确答案及解析
正确答案
解析
本题考查ADO.NET知识。
Command：对数据源执行操作命令并返回操作结果。
Connection：主要用来连接数据库。
DataReader：从数据源提取只读、顺序的数据集。
DataAdapter：在DataSet与数据源之间建立通道，将数据源中的数据写入DataSet，或根据DataSet中的数据改写数据源。
综合分析，本题选B。
包含此试题的试卷
你可能感兴趣的试题
Advancements in （ ）have contributed to the growth of the automotive industry through the creation and evolution of self-driving vehicles.
-
- A.Artificial Intelligence
- B.Cloud Computing
- C.Internet of Things
- D.Big Data
- 查看答案
In project human resource management , （ ）is not a source of power for the project manager.
-
- A.referent power
- B.expert power
- C.reward power
- D.audit power
- 查看答案
At the project establishment stage , the feasibility study mainly includes techinical feasibility analysis , （ ）, operation environment feasibility analysis and other aspects of feasibility analysis.
-
- A.detail feasibility analysis
- B.opportunity analysis
- C.economic feasibility analysis
- D.risk analysis
- 查看答案
（ ）is a grid that shows the project resources assigned to each work package.
-
- A.Stakeholder engagement assessment matrix
- B.Requirements traceability matrix
- C.Probability and impact matrix
- D.Responsibility assignment matrix
- 查看答案
Xinhua News Agency reported in January 2022，Chian will further promote the developmet of a digital economy during the 14th Five-Year Plan eriod（2021-2025）. The plan also emphasized industrial （ ）transformation.
-
- A.digital
- B.networking
- C.intelligentize
- D.informatization
- 查看答案