Class has only one instance. Q: How can we guarantee it? Answer: Private constructors are used to ensure that classes cannot be instantiated outside the class.
来迟了，本来要自罚三杯的。
一黑一花两只小狗正在地上蹒跚乱转，嘴里还不住地叫，很不安的样子。
严嵩抑住伤痛，就此禀求皇上，允世藩卸任总督守丧。
How should we defend against this attack? First of all, as users, we try our best to download APP from regular channels and surf the Internet in a civilized manner, and try our best not to make broilers. Secondly, as a service manufacturer, when the server is attacked by DDoS, we try our best to improve the processing capacity of the server. When the processing capacity of our server is greater than that of the attacker, these attacks are nothing to the server. Finally, under normal circumstances, the processing capacity of our server is generally lower than that of the attacker. In view of this situation, there are currently the following methods: 1. Violent methods, such as setting an access frequency threshold, and rejecting when the number of accesses per IP unit time exceeds this threshold; For a certain service, if the instantaneous request is too large, choose to directly refuse to ensure the normal operation of other services; This method may result in normal users not being able to use it. 2. Verification code. In order to prevent normal users from being injured by exposure methods, at present, service providers will send verification codes to "users" when receiving a large number of requests. If it is a real user, it will input verification codes, but if it is a broiler, it will not. Through this method, the real user and the broiler will be distinguished.
[Standard Answer] In the anti-terrorism work, citizens' () should be respected and any practical practices based on geographical, ethnic, religious and other reasons should be prohibited.
When the SynAttackProtect value is 2 (Microsoft recommends this value), the system uses not only the backlog queue, but also the additional half connection indication to handle more SYN connections. When this key value is used, the TCPInitialRTT, window size, and slidable window of tcp/ip will be disabled.
《恋爱细胞》改编于韩国同名网络漫画，讲述了小猫navy为了帮助有情人终成眷属，不断研发恋爱技术的故事。第二季2015年9月14日在NAVER TV CAST首播
天野光彦（Mitsuhiko Amano）在46岁时恢复了自己的16岁自我。 有一天，我重组，离婚，并以为自己漆黑了，有一天，我意识到自己16岁！ 时间是1986年。 初恋小泽小月（Satsuki Ozawa）与现任妻子佐治子（Sachiko）从未在高中谈论过，重返高中并与不良，学过的成人游戏相处并经历了困惑 我们为没有的“第二青年”唱歌。
S军区着眼未来战争发展趋势和部队信息化建设需要，决定从所属各侦察、通讯等部队选拔优秀官兵，组建一支能适应未来信息化条件下作战需要，执行应急任务的精锐部队。经严格筛选，初步留下80名队员，然后再进行全程淘汰，直到留下最精锐的队员，形成全天候、全时段的实战能力……
周瑜见美人计失败，又以声色羁縻之，刘备果然乐不思归。赵云复用诸葛亮锦囊之计，佯报曹操袭取荆州。刘备惊慌欲走，告于尚香。尚香拜别国太，随其潜逃。周瑜遣将追赶，皆为尚香斥退，继而率兵亲至，时诸葛亮已用船迎接刘备脱险。周瑜反受张飞（杨赤 饰）之辱。
If the number of network packets exceeds the upper limit, network congestion will occur. Slow response (consumption of network bandwidth resources)
Bao Xuhua et al. "King of Destruction: An in-depth Analysis of DDoS Attacks and Prevention"
习惯了“狼捉羊”的“套路”，可曾想象过狼与羊和平相处的温馨画面？据原创动力副总经理蔡瑞琼在发布会介绍，2019年寒假即将和观众见面的《羊村守护者》也许可以实现这个愿望。这次新作品会更加注重情感的刻画，兄弟情、友情、父子情、亲情，通过高质量的情节和内容，会让更广泛的年龄人群，产生情感共鸣。
《机智过人第二季》是中央电视台和中国科学院共同主办，中央电视台综合频道、中国科学院科学传播局和长江文化联合制作的原创科技挑战节目 。
Reference: Baidu Encyclopedia-Application Double Opening
秦国，能给予怎样的帮助呢？尹旭对此颇为好奇。
