D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:
白冰江有着坚强的毅力和信念以及曲折的奋斗经历，但是命运的捉弄总是接踵不断，遭受生意失败后，合作伙伴却离奇自杀身亡，与华宇集团董事长千金的婚礼上又有人送来了一个私生子，新娘蒙辱，婚礼流产。一张充满危机的大网向他扑来，其实这一切事件背后隐藏着不可告人的秘密……
她动作娴熟，显然经常摘。
As shown in the above figure, when ping 156 host, the PING command has not been responded to. It seems that our iptables rule has come into effect. The message sent by ping has not been accepted by 156 host at all, but has been discarded, so let alone any response. Well, we have successfully configured an iptables rule. It seems that we have already started.
你们说说，我妹妹还敢进门么？进了门要咋处？那不是白让人嫌弃。
Judging from the harmfulness and attack behavior of DDoS, we can divide DDoS attack methods into the following categories:
"I belong to a very hard shell." Allie explained herself this way. Ellie's mother has a bad temper, belongs to poison tongue and does not know the discretion. Long-term stress makes Ellie especially sensitive to language, and she will fight back if others offend her slightly. Ally is too strict with herself and others.
此剧讲述两个家族间的秘密与恶缘解开后，成为真正的家人的故事。
而且，尹旭于我与母亲有救命之恩，为此女儿也几次搭救尹旭，可以说我们范家和尹旭之间也算是颇为熟食，是有交情了彼此之间有些了解，交流和合作也就方便了许多。
只见项庄摆开架势，长剑挥动，灯火映照之下剑刃寒芒闪动，飘逸灵动的剑招展示开来，在中军大帐内游走着。
You can tell me first
《脱口秀大会》第二季是由腾讯视频、笑果文化联合出品的中国最好笑的脱口秀竞技节目。
张家进京，他都做好了心理准备，要迎接一波混乱的。
Correspondingly, in order to practice rhetoric in Chinese writing, one must have sufficient vocabulary, and exquisite vocabulary is found in Mencius, Zhuangzi, Tang Poetry and Song Poetry. I used to read ancient books and always excerpted the good words and sentences I saw, but I didn't output them in the writing process, so I often forgot them. Referring to Franklin's method, we can "understand the meaning and forget the words", remember the meaning and artistic conception of the words, imitate them ourselves, and then compare and revise the original text. In this way, these books are our teachers.
There are two meanings here, that is, in the situation that the target customers and products are applicable to a very wide range of objects, as new salesmen, we can start from our own contacts if we want to achieve rapid results. After all, there are various connections. We can first sell the products to them, achieve certain development, and increase some confidence in our next development. Another meaning is to use the relationship of friends to build a relationship with the target customers you have targeted and launch marketing.
The process of solving crimes:
朱雀将军是何居心？板栗冷笑道：是何居心？当然让全京城的人都来瞧瞧：你胡家是如何教导小辈的。
北京某中档住宅小区顶楼，有三户人家的子女都进入了高考备战期。因抱着“一考定终身”的想法，三个家庭都陷入了无比焦灼的备战状态，由此引发的问题也接踵而至。林家的孩子因户籍原因无法在北京参考，全家人为此到天津买房，每天奔波往返于两个城市。乔家的两个孩子都明显偏科，让乔家夫妇焦急不已。冯家的孩子已经复读了三年，加上冯家夫妇隐藏了早已离婚的真相，整个家庭的气氛变得十分压抑。三个家庭各自在教育问题上反复挣扎，寻求出路。最终，孩子们都走出困境，获得成长。他们欣然接受了他们的考试结果
