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美国怎样解决「读书难」的问题？那些已经步入社会但是想继续深造的成年人该怎么接受高等教育？这部情景喜剧在一定程度上解答了这些问题。Greendale社区大学的学生有些「特殊」。这倒不是说他们身体上有什么缺陷，而是因为他们的构成千奇百怪－－有高中时代的「差生」，有刚刚离婚的家庭主妇，还有「活到老学到老」的老人。没有了象牙塔的神圣感，社区大学圆了这些人的「高等教育」梦。该剧根据真实事迹改编，创作灵感来源真实生活，全方位、多角度地展现东北新农村建设迈向城镇化、现代化的发展历程。上河村村主任郝运辉在领导村民开山筑路的过程中不幸遇难，生命垂危，临终前他希望俊龙能够回上河村带领村民继续奋斗，实现几代上河村人“要让家乡父老过上城里人的生活，有尊严地活着”的美好梦想。俊龙决定放弃董事长之职，回村参加新一届村主任竞选——去和生他养他的那片黑土地共同实现那美丽的梦——美丽的“中国梦”！俊龙回到上河村，立即陷入爱恨情仇矛盾的漩涡，诋毁、纵火、恐吓、打砸、暗害接踵而来。俊龙边神奇地化解着矛盾、艰难地维护和谐发展经济，边带领着乡亲们开山筑路、以特色经济、人参深加工为切入点，坚持“以工促农、以工兴村、以工富民”的发展思路，终于上河村人挺起了尊严，过上了令城里人都羡慕的幸福生活。Figure 1 is an example of a JOP attack. In this example, the attacker's aim is to execute a system call "int 0x80" to open a new command line window. To do this, an attacker needs to modify the contents of the eax register to "0x0000000b" and the ebx register to the string "/bin/sh" before "int 0x80" is called, and the ecx and edx registers must point to the value "0x00000000". Suppose the value "0x0000000" and the string "/bin/sh" can be found in memory when the program is running. An attacker needs to construct the value "0x0000000b" himself. However, for the value "0x0000000b", when an attacker saves data to the stack through a buffer overflow, the "0x00" byte will trigger the system to terminate the read operation. This example specifically describes how the attacker uses the existing code snippet in the program to modify the value of val pushed into the stack by the attacker step by step from "0xffffff0b" to the value required by the system call "0x0000000b", thus implementing JOP attack. The following are the detailed steps of the process.(1) Must be Nanjing insured units (except the original five counties: Gaochun, Lishui, Liuhe, Jiangning, Laojiangpu) (2) Unit clerks should hold Nanjing social security cards.1. Projection and shadow setting method of objects