在窗体上画一个标签（名称为Label1）和一个时钟组件（名称为Timer1），添加2个按钮“开始”（Button1）和“停止”（Button2）。程序运行后，单击窗体“开始”按钮，时钟组件启动，并开始在标签中更新显示当前时间，每隔1秒钟变换一次，按停止按钮停止计时。（见图）。请填空&#65377; <img src="https://nimg.ppkao.com/2018-08/luke/2018080113580688440.jpg?sign=bb2a346c2316130ebc13ad7a42695b7c&t=62d03067" /><br /> 然后编写如下几个事件过程:&#8194;<br /> procedure&#8194;TForm1.FormCreate(Sender:&#8194;TObject);&#8194;<br /> begin&#8194;<br /> &#8194;&#8194;Timer1.Enabled&#8194;:=（①）&#8194;;&#8194;&#8194;&#8194;<br /> Timer1.Interval&#8194;&#8194;:=&#8194;（②）&#8194;;&#8194;<br /> end;&#8194;&#8194;<br /> procedure&#8194;TForm1.Button1Click(Sender:&#8194;TObject);&#8194;begin&#8194;<br /> &#8194;&#8194;Timer1.Enabled&#8194;:=&#8194;（③）&#8194;;&#8194;<br /> end;&#8194;&#8194;<br /> procedure&#8194;TForm1.Button2Click(Sender:&#8194;TObject);&#8194;begin<br /> Timer1.Enabled&#8194;:=&#8194;&#8194;（④）;&#8194;<br /> end;&#8194;&#8194;<br /> procedure&#8194;TForm1.Timer1Timer(Sender:&#8194;TObject);&#8194;begin&#8194;<br /> &#8194;&#8