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Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a stro 阅读全文
posted @ 2016-06-12 19:59
mengyue
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Description Sudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown on the Figure. In some 阅读全文
posted @ 2016-06-12 15:37
mengyue
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