1问题提出操作题是苏教版高中数学教材所特有的一种题型,其教学现状怎样呢?带着这个问题在为高三年级命制的一份模拟试题中,笔者有意选用下列操作题:如图1,已知椭圆C1:x2a2+y2b2=1(a>b>0).设斜率为k的直线l交椭圆C1于A、B两点,AB的中点为M. 1 questions raised questions is the Soviet version of high school mathematics teaching textbooks unique to a type of question, what is the status quo of teaching? With this question in the third year of life a simulation test questions, I intend to use the following questions: As shown in Figure 1, we know the ellipse C1: x2a2 + y2b2 = 1 (a> b> 0). Let a straight line with slope k be the intersection of ellipse C1 and point A, B and the middle point of AB as M.