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In addition, As Zhang Xiaobo said, On the front line at that time, Wearing or not wearing a helmet is a "choice", Because Vietnam is located in Southeast Asia, The climate is hot and humid, Helmets are heavy and airtight, Wearing it is very easy to cause heatstroke, Particularly in fast maneuvers, This is the easiest way to do strenuous activities such as running. Therefore, in order for the troops to fight more efficiently, There would be no mandatory order for everyone to wear a helmet, If you don't want to wear it, you can choose to wear a cloth cap with eaves. So in the vast majority of relevant historical photos, Among our troops participating in the war, The highest percentage of helmets is worn by artillery, It is mainly used to defend the fragments of enemy artillery and various hard objects brought up by explosions in artillery warfare. Even some border militiamen wore helmets in large numbers, On the contrary, the impact is at the forefront, Infantry units carrying out a large number of mobile combat missions are rarely worn, Investigate its reason, It is for the infantry troops to carry out large-scale interspersed operations frequently. Exercise is enormous, It is really inconvenient to wear helmets, This approach has both advantages and disadvantages, It is not good to judge right or wrong here, but when facing such a horrible "killer bee" on the ground on 149, it is regrettable and regrettable that the heavy casualties caused by the low wearing rate of helmets have to be said. If they had worn helmets instead of military caps like Zhang Xiaobo, the casualties caused by the sting attack of "killer bee" would have been much smaller.“Rex 保证为您找到最完美的另一半”。传说中的吸血鬼里斯特从几十年的长眠中苏醒，他决定不再躲藏在阴暗之中生存，而要像人一样生活在阳光照耀之下。于是他凭借吸血鬼特有的迷人魅力与桀骜的气质，成为了一个万人迷的摇滚明星，他自己的音乐唤醒了在北极冰窖中已经沉睡了近6000年的吸血鬼女王——来自埃及的阿卡沙。阿卡沙女王是吸血鬼的祖先，在地下蛰伏了数十个世纪，一直伺机统治世界。苏醒后的吸血鬼女王立刻展开了一场向旧日仇人报复的计划，而且更希望与里斯特一起主宰地球，将人间变为地狱。另一方面，吸血鬼猎人杰西·瑞薇丝却鬼使神差地爱上了风度翩翩的里斯特。里斯特会作出怎样的选择？冷酷无情的吸血鬼女王阿卡沙又会有什么样的反应？结果让人着实猜不透。《爱情相对论》故事发生在一家神秘的咖啡馆内，围绕天才的天体物理学家霍银和其风流倜傥的大学同学辣妹多展开各种爱情诊断故事。如今不少都市男女都面临“真爱难寻”的困惑，罹患各种爱情障碍症，浮现各种恋爱症候群，如：爱情失语症、失恋超忆症等等。《爱情相对论》正是希望通过科学与情感的有趣结合，帮助都市男女解决爱情障碍，找到自己的真爱，呼吁并鼓励大家勇敢去爱，更要科学去爱。At the beginning of its development, the application of network mind mapping was very primitive, the connection related to topics was very rough, and it did not support advanced functions such as project management and demonstration. Now, the development of HTML5 technology has produced many fast and elegant applications. For example, Thebrain, a dynamic mind mapping software. This is a three-dimensional mind mapping tool, which breaks away from the limitation of the traditional plane mode in the way of mapping presentation. At the same time, it supports all popular online services. Each node above can be connected with relevant network resources, and it is like a brain in the eyes of users. All accesses can be quickly completed by clicking or entering simple characters.