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:
民国初年一个充满茶香的小镇，有谭、佟两大家族。谭铭凯在谭老爷弥留之际匆匆赶回继承家业。谭铭凯的回归带给小镇上年轻人除了进步思想之外，还有追求平等和爱情的勇气。佟家大小姐丝若一直盼着成为谭铭凯的新娘，却盼来他不可救药地爱上了她的好姐妹、茶农的女儿如意！于是，佟丝若对如意的友谊变成了仇恨，与本该是谭家二少爷的高秋朗联手摧毁谭家。高秋朗一步步算计谭家，而如意和谭铭凯的爱情也被他当作了筹码。如意遭受着谭夫人的折磨和高秋朗计谋的伤害。高秋朗如愿得到谭家后，计划让谭夫人葬身火海，却将自己的生母逼入绝境。如意与铭凯也因这场大火遭遇生离死别。众人经历种种劫难，纷纷放下旧怨，开始新生活。
爱奇艺与邵氏影业首次合作。国内首次以“保险理赔员”为视角，追查保险事故真相，集动作烧脑、悬疑推理于一身的虐心而又温情的行业故事。
北宋年间陷空岛住着五个结拜兄弟绰号“五鼠”，江湖南侠展昭因佑护包公有功被宋仁宗赐 “御猫”封号，奸贼太师庞吉妒恨包公遂故意派人挑拨，说包公让仁宗赐展昭“御猫”，目的就是要灭“五鼠”的威风。五位义士大为恼火，要立赴东京与展昭一决高低。去往东京途中，五鼠得知庞吉之子庞昱在陈州的种种恶行，决定先去陈州除掉庞昱，为彻底铲除奸臣庞吉、庞昱，包公另施一计，让展昭因好赌输掉好多钱，庞吉利用此事救下展昭派往陈州助庞昱一臂之力。展昭以沈仲元的身份混进庞昱府中，暗中搜集庞昱的犯罪证据。五鼠等人和展昭里应外合，不仅为包公洗脱冤情，还将庞昱斩首，为陈州百姓铲除了这个无恶不作的恶霸。为报杀子之仇，庞吉又设下了惊天阴谋加害包公和五鼠等诸位英雄 。
MBC最新电视剧《我全部的爱》讲述一个贫穷但善良的家庭与一个富有却自私的家庭之间的错综复杂的故事。充满欲望的龙凤双胞胎兄妹金枝（Gain饰）和玉叶（赵权饰）的妈妈朴美善和尽管有钱却非常吝啬的学院院长金甲秀再婚之后将上演多样且丰富多彩的故事。
“我们决不当李自成!”“我们能跳出这个周期率!”毛泽东进京时这两句话成为全剧的主旨。为了探索重大革命历史题材创作禁区，剧中还以很大篇幅描绘了毛泽东与江青、毛岸英、毛岸青、李纳、李敏及蒋介石与蒋经国、蒋纬国、宋美龄、蒋孝勇、蒋孝武等历史人物的情感纠葛，还原出一个真实、平凡有着七情六欲，也有着难言之隐的毛泽东。
Building a modern economic system is an urgent requirement to cross the border and a strategic goal for China's development. The report of the 19th National Congress pointed out that We must adhere to the principle of putting quality first and giving priority to benefits. Taking supply-side structural reform as the main line, We will promote quality, efficiency and power changes in economic development. We will improve total factor productivity, speed up the construction of an industrial system with coordinated development of real economy, scientific and technological innovation, modern finance and human resources, and strive to build an economic system with effective market mechanism, dynamic micro-subjects and moderate macro-control, so as to continuously enhance China's economic innovation and competitiveness.
Melinda（詹妮弗·洛芙·休伊特 Jennifer Love Hewitt 饰）具有一种和鬼魂沟通的神秘能力，祖母告诉她这些鬼魂之所以不肯离开，是因为他们和活着的人之间还有未完成的事，并把他们叫做“土地幽灵”。因为Melinda具有与鬼魂沟通的这种特殊能力，所以常常有鬼魂来找她帮忙，并进行一些超自然的调查。正因为此，Melinda经常遭到人们的非议和质疑，但当她发现自己不仅能帮助死者，也同样对在世的人给予援手时，她知道自己的特异功能不是负担而是一笔财富……
4. Enter the interface where MindManager mind map software is being installed. We need to wait patiently for the installation progress bar to complete. The installation speed is very fast and only needs to wait for a while.
他虽然无能，却也知眼下西南形式微妙：不但外敌窥伺，军中也不像往常铁板一块。
……刘宇文已经不知道该怎么表达自己的心情了。
The most basic defense at the network layer is RFC? 2827 [3]. Using input source filtering, ISP refuses to route a packet whose source IP address does not belong to its source subnet further. Input source filtering can effectively prevent SYN flooding attacks disguised as IP. However, this method is useless at present because it is difficult to deploy on a large scale. Moreover, input source filtering cannot resist distributed attacks.
Emin最小的儿子Kadir Saruhanli从监狱回家过节，父子俩的过节再次被提起。
Crazy Alliance WeChat Public Number Begins to solicit manuscripts-There are a lot of coupons waiting for you to get them.
《奇女子之人在江湖》一位是身怀绝技的山村姑娘，一位是成为黑帮老二的冷艳女卧底。阴差阳错间让她们相遇，相识，相知，一场江湖救赎，展开了一段过往的江湖恩怨情仇。令人啼笑皆非，令人胆战心惊。绝技功法现身江湖，究竟是对，还是错。一本神秘笔记能否揭开奇女子的心中疑团。
We now look at the heated IQOS cigarette bomb. The cut tobacco part has turned black and carbonized, and the hollow filter surface also has traces of discoloration. Then we look at the PLA cigarette oil filter. The part close to the cigarette bomb has traces of shrinkage. Finally, we look at the filter tip filter cotton, and there are traces of yellow color.
她又喜欢练武……板栗点头道：这个小葱会安排。
在异世界恩特·伊斯拉，虽然是敌人之间的魔王和勇者在现代日本东京，依然汗流浃背地工作着的真奥贞夫和游佐惠美。
按照陈启的建议，王治乾和网站其他人员一起商量后，暂时把启明的作者分为六个等级，一级、二级、三.级、四级、五级、名家。
安东尼奥（乔恩·塞达 Jon Seda 饰）是汉克手下的一员要将，尽管他曾经和汉克有过一段不太愉快的过去，但他依然将在汉克手下工作当做是一种光荣。其他身在行动组的组员们亦是如此，能够跻身成为情报组中的一员是他们梦寐以求的事情。然而，情报组的工作谈何容易，加入了情报组，就以为这要和芝加哥最邪恶、最凶残的罪犯展开正面交锋。
