摘要:
图像: 代码: <!DOCTYPE html> <html lang="utf-8"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <head> <title>椭圆:x^2/120^2+y^2/150^2= 阅读全文
摘要:
【图像】 【代码】 <!DOCTYPE html> <html lang="utf-8"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <head> <title>椭圆:x^2/250^2+y^2/200^ 阅读全文