当你使用ADO.NET连接数据库时，你首先需要使用（）对象来创建数据库连接

A. DataSet

B. DataTable

C. DataView

D. DataReader

A. INSERT INTO Employee(Name,Gender,Age,Rank) values(‘张朝阳’，’男’，48，’201’)

B. INSERT INTO Employee(Name,Gender,Age,Rank) values(“张朝阳”，”男”，48，”201”)

C. INSERT INTO Employee(Name,Gender,Age) values(‘张朝阳’，’男’，48，’201’)

D. INSERT INTO Employee(Name,Gender,Age,Rank) value(‘张朝阳’，’男’，48，’201’)

A. Form

B. Control

C. Event

D. Property

A. DataSource

B. InsertCommand

C. UpdateCommand

D. DeleteCommand

A. ComboBox

B. ListBox

C. DataGridView

D. CheckBox

A. 继承

B. 封装

C. 多态

D. 封装、继承

A. SELECT sID,sName,cId,score FROM student,studentCourse

B. SELECT,sID,sName,cID,score FROM student INNER JOIN studentCourse ONstudent.sID = studentCourse.sID

C. SELECT,sID,sName,cID,score FROM student OUTER JOIN studentCourse ONstudent.sID = studentCourse.sID

D. SELECT,sID,sName,cID,score FROM student, studentCourse WHERE student.sID = studentCourse.sID

A. 010053090D

B. 01003090A01

C. 01053090B09

D. 0101A01

A. html部分，头部分,正文部分

B. html部分，头部分,title部分

C. html部分，head部分

D. title 部分，html部分，p部分

A. DBUtility

B. Common

C. Entity

D. Model