题目

以直线3x－4y＋12＝0夹在两坐标轴间的线段为直径的圆的方程为________________． 答案： (x＋2)2＋2＝---Mr. Li, I can’t understand everything in class.---Don’t worry! I’ll ________ the main points at the endA.recordB.reviewC.requireD.remember