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Aviation units mainly carry out tactical training, combined with combat missions, focusing on combat technology and tactical application training to improve their ability to carry out missions under complex conditions. Every year, tactical, technical, theoretical and physical assessment is organized, and flight grade assessment is carried out, and pilots of Grade I, II and III are respectively assigned. The purpose of aviation unit training is to enable each pilot to master the combat technology of advanced aircraft and be able to undertake combat missions.20　　于是，他派方世玉拦截日本浪人。方世玉不知要夺之物的重要性，途中为救一遭劫少女而未拦截成功。不久，密探禀报陈家洛，“身世书”落入两广总督孙士毅之手，而他的女儿孙安儿正是被方世玉解救的遭劫少女。For codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.天启的书友读者们不停的吐槽起来。留学日本的舞台剧演员袁天杰在日本的妻子神秘失踪。袁天杰回国寻妻却被军统训练成为特工，他和潜伏在军统内部的共产党员舒秀一起接受了寻找日本特务“千面媚蝶”的任务。大明星姚芊芊的身份扑朔迷离，似乎和神秘的“千面媚蝶”也有某种联系。通过侦查和分析，舒秀和袁天杰得知姚芊芊是被她的私人医生翁子安做了整形手术后潜伏下来的日本军官，她在上海暗杀多名优秀的爱国人士，舒秀带领袁天杰等人在中共党组织的领导下与之展开殊死搏斗，最终改头换面成姚芊芊的“千变美娘”原形毕露，她其实就是袁天杰苦苦寻找的日本妻子。最终，正义战胜邪恶Find a good comment and add it to the original text!