总共是循环两次，panel[0]正常显示，而panel【1】显示不出来，可是实验后发现窗口中存在Panel[1],而且panel[1]中也有东西，这是怎么回事？？？？？？？？？？？？？？？？            
Panel[] panel = new Panel[totalNumber];
            //将问题和选项使用一个循环进入窗口和控件中
            //ferry变量存放现在是第几次循环
            int ferry = 0;
            while (reader.Read())
            {
                //设置panel的属性
                panel[ferry] = new Panel();
                panel[ferry].Width = 412;
                panel[ferry].Height = 40;
                panel[ferry].Location = new Point(0,30+ferry*40);
                int width = panel[ferry].Width / 4;
                int height = panel[ferry].Height / 2;
                this.Controls.Add(panel[ferry]);
                //title变量存放题目
                string title = reader.GetString(3);
                //change变量存放选项
                string[] change = new string[4];
                for (int i = 0; i < 4; i++)
                {
                    int a = 4+i;
                    change[i] = reader.GetString(a);
                }
                RadioButton[] radiobtn = new RadioButton[4];
                //进行题目位置和大小的初始化
                TextBox textbox = new TextBox();
                textbox.Text = title;
                textbox.ReadOnly = true;
                textbox.BorderStyle = System.Windows.Forms.BorderStyle.None;
                textbox.Height = height;
                textbox.Width = panel[ferry].Width;
                textbox.Location = new Point(0,ferry*panel[ferry].Height);
                //将题目添加入panel
                panel[ferry].Controls.Add(textbox);

                //设置radiobutton的长和高    
                for (int i = 0; i < 4; i++)
                {
                    radiobtn[i] = new RadioButton();
                    radiobtn[i].Text = change[i];
                    radiobtn[i].Name = "panel" + ferry.ToString();
                    radiobtn[i].Location = new Point(i * width, height + ferry * panel[ferry].Height);
                    radiobtn[i].Width = width;
                    radiobtn[i].Height = height;
                    panel[ferry].Controls.Add(radiobtn[i]);
                }
                ++ferry;
            }