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:
1. The user accesses a form page.
保护伞公司在海底建造了逼真的模拟城市，并使用克隆人作为T病毒的实验对象，为了抵达出口，爱丽丝一行人必须穿越东京、纽约、华盛顿和莫斯科四座城市，而每座城市中，都有属于它的丧尸们在蠢蠢欲动。
周良貨と能田茂によるマンガをもとにした本作は、2018年に放送された「連続ドラマW 監査役 野崎修平」の続編。経営悪化したおおぞら銀行の頭取に就任した野崎修平が役員たちから失脚を企てられる中、同行を再生させるために奮闘する。
This summer vacation, I took part in the "Social Practice Activities for College Students to Go to the Countryside in Summer" organized by the School of Urban Management of Hunan City University. In order to let students better master professional knowledge, Carry forward patriotic enthusiasm, serve the society and the people attentively, let students have all-round contact, understand the situation of poor areas in society and personality, and through investigation, find out the actual problems existing in the area, analyze and make solutions, and experience and comprehend from them to enhance the sense of mission of college students. In order to cultivate good social adaptation potential and strive to train oneself to become a contemporary college student who is beneficial to the society and the people, Secretary Liu Hui, Secretary of the General Party Branch of the Institute of Urban Management, was arranged to be our leading teacher. Under the form of building a new socialist countryside in the whole country, the theme of our activity is "serving the new countryside and building a new home."
此剧讲述了小心谨慎的女主突然有一天有了可以和猫咪沟通的能力，与挑剔的猫咪达成某种简交易，主要讲述了便利店兼职生和暖男飞行员之间展开的一段奇幻爱情喜剧故事。 宋枝恩剧中饰演平凡的便利店兼职生一角，性格乐观开朗，她暗恋的人委托她帮忙看管猫咪，然后她突然可以和猫咪沟通 崔泰俊剧中饰演猫咪管家，航空产业从业者白泰华一角，在飞行前一天，突然宠物酒店关门，他把猫咪交给一个女子保管。 绝妙的遗产金景锡编剧执笔
以“微笑影楼”和“体育中心”为背景的二个相邻家庭之间日常琐事的情景喜剧。又名《辣白菜，沙拉，笑》，是续《无法阻挡》之后播出的短片搞笑剧。这部戏讲述的是一个像辣白菜一样很普通又很保守传统的家庭（申九的家庭）和另外一个像沙拉一样非常有钱而且很开放的家庭（善宇恩淑的家庭）之间成为亲戚之后发生的搞笑故事。
Asynchronous blocking I/0
是一部以一个“子女傻瓜”爸爸利用不孝诉讼改变自私的子女的故事为中心，传达在家中感受到的恩情及歉意的家庭剧。
现在，你该明白那几个人为何不追杀你，却把其他人都杀了吧？卫江颓丧地低下头。
正是因为这样的原因，云青山没有被刘邦和共尉的花言巧语所打动，从而倒向了越国。
两个家庭共同的敌人把李默森和黄梓晨的命运绑在一起。女校霸和呆萌外星人将携手对抗邪恶的陈草莓势力。
超级活泼可爱的加菲猫回来啦! 什么?他只会躺在沙发上吃着披萨懒洋洋的看电视?那你可错啦,有了加菲猫,可没让他的伙伴欧迪消停过。他的鬼点子让他们的主人乔恩也抓狂不已。不过,当朋友遇到危难,顽皮的加菲猫也会挺身而出,成为盖世英雄。 千万不要冒犯他哦,他会让你灰头土脸;千万也 别小瞧他哦,你无法抗拒他可爱的眼神,搞怪的行为。 最新的3D技术,精良的制作工艺,《加菲猫的幸福生...
男宿舍夜谈，舍友们疑惑于大姨妈来了到底有多疼，男神何之洲一贯不屑参与这种低级趣味的对话，直到他变成了女人，脸色苍白地躺在床上。
A hardware firewall can be set up in front of the Web server to specifically filter requests. This effect is the best, but the price is also the most expensive.
After grade 77, you can go to the platform near the flight administrator in Dalaran to learn cold flight, which requires 1000G g, but if you have 80 tubas on the same account that have already learned cold flight, you can go to the big bird to buy a book and send it to you on the trumpet.
[Irrigation Nutrient Solution]
Once again, the current boss asked me to report on the user's operation plan. I thought to myself, do you only listen to the user's operation? There are six businesses in the whole operation.
眼看轮到他们了，徐风忙岔开话题然后先取了药，最后佯装听不清避开了话题。
《远古入侵》是一部投资巨大的科幻电视剧（相对于英国的科幻剧来说），首播于英国ITV电视一台。故事讲述了Nick Cutter教授和他的小组在迪恩森林（Forest of Dean）调查时发现了时空异常现象，这种异常产生的副作用直接导致远古时代的恐龙和许多令人难以想象的生物来到今天的地球。调查中，Cutter教授的妻子失踪了，Cutter教授不顾一切地想要找到她。
