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The math book has changed.
It is recommended to buy a new version. Although there is little difference from year to year, there will still be some changes year after year.

and

1. If you buy a new version, you will be more motivated to learn independently. Wherever you do it, you will have a sense of accomplishment when you turn over the book.

More than 90% of the postgraduate entrance examinations around you should be new versions, so that you can know everyone's progress and have a reference. More importantly, if there are problems that can't be solved, it is convenient for communication and practical.

You must buy a new version of the real question. Of course, you can make the 20 1 1 version first, copy the real questions of your classmates in recent years, or buy books yourself. No matter what the real problem is in these three years, you must have it.

Don't buy pirated books. The review of the whole book is the most important and used in the whole review process. Mathematics basically depends on reviewing the whole book. The quality of pirated books is not good, and it is very troublesome to turn pages a few times. In addition, the paper quality and printing are very poor. After using it for several months, the paper turned yellow, which at least affected my mood. I have a classmate who bought pirated books first, used them for more than a month, and finally. Wasted.