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新年就要来临了,为了欢度节日,特为同学们提供几道巧用反证法妙证“2011”趣题,以资助乐,并欣赏反证法的魅力.
New Year is just around the corner. In order to celebrate the festival, students are offered several tips on using the anti-card testimony “2011 ” to support music and enjoy the charm of counter-carding.