今年苏北四市的高三第二次质量检测结束后,有幸聆听了本校一位老师的一节试卷讲评课.本节课主要围绕这次质量检测试卷的第17题的第二问进行展开,听后有些感触.题目已知位于y轴左侧的圆C与y轴相切于点(0,1),且被x轴分成的两段弧长之比为2:1 This year, after the completion of the third quality test of the third year in the four cities of Northern Jiangsu, we were fortunate enough to have listened to one of our teachers’ one-time test papers. This lesson focused on the second question of Question 17 of this QA test paper. After listening to some feelings, the topic is known that the circle C on the left side of the y-axis is tangent to the y-axis at the point (0,1), and the ratio of two arc lengths divided by the x-axis is 2:1.