题目

Too often we accuse others of not listening, pretending that we ourselves are faultless, yet in our hearts we know that many of the mistakes we make come about because we haven’t listened carefully enough.  We get things wrong because we haven’t listened carefully enough.  We get things wrong because we haven’t quite understood what someone meant when they were talking to us.  Anyone who has ever taken the minutes of a long meeting will know how hard it is to remember-- despite the benefit of notes-- exactly what everyone said.  But success depends on getting things right--and that m野营活动中，小明用等腰三角形铁皮代替锅，烙一块与铁皮形状和大小相同的饼，烙好一面后把饼翻身，这块饼仍然正好落在“锅”中，这是因为______________________________.