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with replacement要像楼上那样做,without要像我那样做,然后不管是with还是without都要{()}这样列出来 MarsNg 发表于 2011-11-16 07:49 PM
回复 siyu1884 你真的明白了? 那做 without replacement 来看看 sicayurifany 发表于 2011-11-16 07:59 PM
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