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The above design, as commented above, when executing the Resize method of SmartTest, if a rectangular object is passed in, when the height is greater than the width, the width will be automatically increased until it exceeds the height. However, if a square object is passed in, it will fall into a dead loop. The fundamental reason at this time is that rectangles cannot be the parent class of squares. Since there is a problem, they can be reconstructed so that both of them inherit from quadrilateral classes. The refactoring code looks like this:一个偏远贫穷的小山村里，活泼善良的女娃小花，在爹娘和奶奶的呵护下，过着虽不富裕但却快乐的生活。小花娘就快生了，她爹为了多挣些钱去了黑煤窑打工。一个大雨滂沱的日子，小花爹被埋在了坍塌的煤窑里，小花娘也因为急火攻心加上淋雨引起大出血失去了生命。从此小花和瞎眼多病的奶奶过着相依为命的生活，懂事的小花用自己瘦小的身躯支撑着濒临解体的家，小花的眼泪和万般努力，最终没能留住唯一的亲人奶奶，小花从此成了孤儿。Synflood attack is the most common DDoS attack on the current network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing.掌管世间鲜花的花神因为贪嘴偷吃了王母娘娘的鲜花而被贬下凡间，降落到了一个花园餐厅中，并阴差阳错的成为了餐厅老板顾渊的徒弟，单纯可爱的“吃货”花神与高冷帅气的大厨也在日常相处中逐渐产生了情愫，而顾渊的师弟林华也对花花一见钟情，三人由此展开了一段温馨欢乐的爱情故事。偏苞谷鼻子灵，觉得不大对劲，跟小狗似的耸耸鼻子，然后望向二人，神情十分疑惑。这牵连可以说是交情，也可以说是勾结。　　开元盛世，当朝太子病重，所有太医束手无策，就在皇帝为太子秘密寻找药方之际，一位高人诊断称太子命格极为特殊，需带“佛骨舍利”皈依佛门，可皇帝不舍太子受苦，便命与太子八字相同的裴伦德代为出家，裴伦德心中虽有不满，但也不敢违抗圣令，只能放纵自己来舒缓愤懑的情绪。金光寺方丈预感到裴伦德恐遭灾祸重重，遂指派降魔武僧团的小伍一路护送裴文德，以保其安全抵达金光寺。