参数合成 --- 介绍 ---

这是一个在坐标平面上关于参数曲线图形的练习.

一条参数曲线通过参数为 t 的两个实函数 f 和 g 来确定. 当 t 取不同的值时, 这条曲线是点 (x=f(t),y=g(t)) 的集合. 另外, 我们有两个坐标函数 f(t) 和 g(t) 的曲线图象.

这个练习或者给你两条曲线 f, g, 要求你识别参数曲线 (x=f(t),y=g(t)), 或者给你参数曲线的图像, 要求你识别 f 和 g 的曲线.

这是练习的参数设置.
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