茫茫题海,变化万千,莘莘学子深感变化莫测,难以招架.其实不然,纵观历年的中考数学题,虽然年年有变化,但很多试题都是课本例题或习题的引申和改造.这就告诫我们在平时的学习中应注意把典型的例题或习题进行变形,归结成一系列数学问题去探究. In fact, otherwise, taking a look at the years of the entrance exam math problems, although changes every year, but many of the questions are textbook examples or exercises extension and transformation This warns us that we should pay attention during the normal study to deform the typical examples or exercises into a series of mathematical problems to explore.