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笔者在研究湖北省2007届高三第二次联考理科第20题时,顿悟出与之相关的一组变式与拓广,为方便讨论,现给出原题:
When studying the 20th issue of the 2007 second-year college entrance examination in Hubei Province, the author came up with a set of variants and extensions related to it. For the convenience of discussion, the author has given the original title: