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在近年的高考中,如稍加留神,便可以发现,绝对值问题扮演了重要角色.笔者浏览了近几年的高考题和希望杯的竞赛题,感到绝
In recent college entrance examinations, if you take a little care, you can find that the absolute value problem has played an important role. The author browsed the questions of the college entrance examination and the cup of hope in recent years.