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The paper discusses Cantors Diagonal Argument and the countability of set of real numbers based on the previous studies. 摘要在前期研究的基礎(chǔ)上，進(jìn)一步討論了康托對(duì)角線(xiàn)法及實(shí)數(shù)集的可數(shù)性問(wèn)題，并給出了一個(gè)證明。