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Category 4: Through the intermediate categoryWell, this article has already summarized how to add, delete and modify iptables rules. Combined with the previous article, we have mastered the "add, delete, change and check" of iptables rules. At the same time, this article has also summarized how to set the default strategy of the chain and how to save iptables rules.5. Cui RihuaMemory, which can be divided into two types: one is called random, which is responsible for temporarily storing data waiting for CPU processing, and the data will be lost after power failure. It has no memory function. If the CPU is compared to the carriage of a train, RAM is the platform, and the people who go up and down the train are the data waiting to be processed and can only stay on the platform temporarily. The other is called read-only device, which can only read but not write, and its contents will not be lost after power failure. We will not introduce all the other equipment in the host computer here. In short, they all perform their respective duties to make the computer run normally, thus making the computer a good helper in our work and life.Telecommunications与刘邦、张良并骑而行，尹旭心有余悸，看来以后说话做事一定得小心了。抗日战阵时期，神州镖局接到一批文物，要送往革命根据地，交给八路当作军费。镖局老英雄苗峰，带着他的女儿苗香儿，以及一批热血男儿誓死护送文物，路上不但遇到了日本人的阻截，又遭遇一伙凶悍的土匪。一番斗智斗勇的厮杀之后，苗峰不幸身亡。宝物被日本人夺走，苗香儿求助于在大法寺高僧，得到大师的入世弟子陆有为帮助。这个时候，聂天鸣带领英勇的八路军小分队前来接应，遇上了苗香儿这路人马。白三等土匪也以大义为重，决定重新做人，加入了小分队，他们各施本领，终于夺回了文物。组成了一个以聂天鸣为中心的，凤凰山抗日武工小分队，继续与日本鬼子做战斗。