摘要: 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 any s 阅读全文
posted @ 2017-10-14 15:37 gaoren 阅读(182) 评论(0) 推荐(0)
摘要: A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number 阅读全文
posted @ 2017-10-14 10:21 gaoren 阅读(173) 评论(0) 推荐(0)