教学"求圆的面积和圆的周长"的程序,给学生作为一个简单的例子讲解.-Teaching for a round the area and circumference of a circle of the procedures available to the students as a simple example to explain.
该控件是一个带表格线的打印构件,使用它,您可以快速地生成一个带表格线的打印效果-the controls is a form lines with a print component, use it, You can quickly generate a form lines with a print results
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