在学习有关平行线与垂线的知识时,熊博士和小飞熊们进行了一次“错题展示会”。[病例1]判断:画已知直线的垂线,只能画一条。()小飞熊乐乐说:“这是对的。反正画多了,会累的。”[病因诊断]小飞熊明明笑了:“这种说法是错的。因为画已知直线的垂线,它没有说在哪个点上画,而直线上有无数个点,所以能画无数条垂线。” When learning about parallel lines and vertical lines, Dr. Bear and the Little Bears made a “wrong presentation”. [Case 1] Judgment: Draw a known vertical line, can only draw one. () Little Le Bear Lele said: “This is right. Anyway, painting more, will be tired. ” [Cause diagnosis] Xiaofei Xiong smiled: “This is wrong because the painting is known to be straight Vertical line, it does not say at what point to draw, but there are countless points on the straight line, so can draw numerous vertical lines. ”