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题目 There is a public bike service in Hangzhou City which provides great convenience to the tourists from all over the world. One may rent a bike at an 阅读全文
posted @ 2020-05-12 20:14
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题目 Suppose a bank has K windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. All th 阅读全文
posted @ 2020-05-12 12:56
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