研习自：[url=https://www.bilibili.com/video/BV1De4y1a7z7/?spm_id_from=333.337.search-card.all.click&vd_source=edcad05029f6d4b15eaba8a422397416]【GGB教学】（指令）折线图7-绘制圆台_哔哩哔哩_bilibili[/url][br]

R=滑动条(0,5,0.01)[br]赋值(R,1)[br]r=滑动条(0,5,0.01)[br]赋值(r,1)[br]h=滑动条(0,5,0.01)[br]赋值(h,1)[br][br][br]f(x)=折线图{0...3,{0,R,r,0})[br]g(x)=折线图{0...3,{0,0,h,h})[br][br]#底面[br]a=曲线((f(s);)+(0,0,g(s)),s,0,3,t,0,2pi)[br][br][br]b=滑动条(0,3,0.01)[br]赋值(b,0)[br]c=曲线(a(b,t),t,0,2pi)