论文部分内容阅读
新课程要求教师提高素质、更新观念、转变角色,必然要求教师的教学行为产生相应的变化.本文中笔者就一例习题教学谈一些粗浅的体会.课堂实录教师出示问题:如图1,已知中心在原点,焦点在x轴上的椭圆左焦点为F(-c,0)过点F作倾斜角为45°的直线l,与椭圆相交于A,B两点,若|AF|∶|BF|=
The new curriculum requires teachers to improve their quality, to update their concepts and change their roles, which inevitably require teachers to make corresponding changes in their teaching behavior.In this paper, I will talk about some superficial experiences in exercises teaching. At the origin, the oval left focus with the focus on the x-axis is F (-c, 0) and the point F is inclined at 45 °. | =