数据库F:\BooksMgt.mdb 包含表Book.创建名为conn 数据连接对象定义如下: OleDbConnection conn = new OleDbConnection(@";Provider='Microsoft.Jet.OLEDB.4.0';Data Source='F:\BooksMgt.mdb'"); 请问下列C#语句是否正确：OleDbCommand cmd = conn.CreateCommand(); cmd.CommandText = "Select * From Book";cmd.CommandType = CommandType.Text;