每年高考数学试卷都有一两道压轴题特别难,成绩一般的学生会选择放弃,成绩好的学生也往往花了很多时间却得不了几分。我们如何有效突破难点呢?平时的训练中又该注意些什么呢?下面以2011年上海卷第22题为例来分析。 Every year college entrance examination mathematics papers have one or two finale problem is particularly difficult, the average student will choose to give up, good grades students often spend a lot of time but not too much. How can we effectively break through the difficulties? What should we pay attention to in normal training? The following is an example from the 22nd volume of Shanghai Volume 2011.