叶圣陶先生曾经说过:“要让课堂活起来。”教师要创设一种有利于学生学习,有利于学生充分发挥主体作用的课堂教学氛围,让课堂教学始终在民主、和谐的气氛中进行。这样才可以让课堂教学充满活力,并富有创造性。在一节“圆锥曲线”复习课中,就出现过这样的情景,兹实录如下。问题(2015年南充模拟试题)已知椭圆C的中心在坐标原点,焦点在x轴上,且过点P(3~(1/2),1/2),离心率是3~(1/2)/2。(工)求椭圆C的标准方程; Mr. Ye Shengtao once said: “Let the classroom live up.” Teachers should create a classroom teaching atmosphere conducive to students ’learning and students’ full play of the main role so that classroom teaching will always be conducted in a democratic and harmonious atmosphere . Only in this way can classroom teaching be full of energy and creativity. In a “conic curve” review class, there have been such a scene, it is recorded below. Problem (2015 Nanchong simulation test) Known ellipse C center at the origin of coordinates, the focus on the x-axis, and the point P (3 ~ (1/2), 1/2), eccentricity is 3 ~ (1 / 2) / 2. (Workers) find the standard equation of elliptic C;