We call a collection of rules that have the same functionality a table, Therefore, we can place rules with different functions in different tables for management, and IPTables has already defined four tables for us, each table corresponds to different functions, and the rules we define cannot escape the scope of these four functions. Therefore, before learning IPTables, we must first understand the function of each table.上世纪七十年代，曾向阳和小池是纯洁相爱的恋人。曾向阳误会父亲出轨，致母亲意外死亡，妹妹走失，父亲伤残。曾向阳为了寻找妹妹，无奈和小池分隔两地。于百家暗恋小池，借助漂亮女孩张闹设计陷害曾向阳。曾向阳被冤入狱，小池在百般误会中下嫁于百家。同事陆小燕善良真诚，坚信曾向阳无罪并大胆向其示爱。曾向阳和小燕的感情在艰难岁月中越走越近。贾管教是曾向阳的良师益友。文革结束后成为法院院长，帮助曾向阳洗冤重返社会。曾向阳准备与小燕结婚，开始新生活。不料此时，于百家和张闹为了谋得曾家的房产，再次设计圈套。在小燕的帮助下，曾向阳识破诡计，保住了文化遗产--------曾家大院。顾小玉满脸黑线，果然正常人和不正常人之间是很难正常沟通。王离、章邯二位秦**方的核心将领都战败了，自己这些人又能如何？即便是凭借险要关隘，也只能抵挡一时，徒增加伤亡罢了。Data Poisoning Attack: This involves inputting antagonistic training data into the classifier. The most common type of attack we observe is model skew. Attackers pollute training data in this way, making classifiers tilt to their preferences when classifying good data and bad data. The second attack we have observed in practice is feedback weaponization, which attempts to abuse the feedback mechanism to manipulate the system to misclassify good content as abuse (e.g. Competitor's content or part of retaliatory attacks)."Er... I really can't remember the model, it's green, probably so thick." Wang Zeduan could not remember the specific model of the explosive cylinder, Just said the color and gesticulated the approximate size with his hand, Later, I looked up the information and learned that The detonators used at position 142 were all Type 68 detonators, This is also a classic explosive barrel widely used throughout the Sino-Vietnamese border war. This type of explosive cylinder is 60 centimeters long each, As long as there is a need, it can be spliced indefinitely. The charge for each section is 2.2 kg, According to Wang Zeduan's description, At that time, the explosive barrel was made up of three sections. Then the total charge is as high as 6.6 kg, However, the high explosive bomb used in the type 66 152 mm howitzer, The charge is 6 kg, In other words, The charge of these three explosive cylinders is 0.6 kg higher than that of a 152 mm grenade. This is also basically in line with his description that it is more powerful than a shell. In addition, after being inserted into the ground, the two sections of the upper half form a certain blast height from the ground, In this way, the explosive power can be better exerted virtually to cover a wider area, so it is indeed reasonable that an explosive barrel can successfully achieve the tactical purpose of successfully clearing position 142 for the second time (the first clearance is 66-type directional anti-infantry mines and 72-type pressure/tripping anti-infantry mines).Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.
