Corrections Sheet for The Official Guide for GMAT® Review, 11th Edition, The Official Guide for GMAT® Quantitative Review, and The Official Guide for GMAT® Verbal Review
就是OG11th的纠正表，不过，估计里面还有一些问题没有谈到，等待他的再次回复和新版OG的问世。
一下是他邮件中的内容：
It is our intent to maintain the highest integrity with our Guides. We strive to be better than the industry standard for print books, which is an error rate of 1 percent. We do an updated print run approximately one to two times per year, and we continuously update the errata sheet as we hear about the corrections.
