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After several days of experience, we have learned that many plants can be dyed, and pigments are already ubiquitous in plants. However, most plant pigments are easy to decompose and disappear. Only plant pigments that are durable and not easy to be oxidized can be used as dyes.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.永平十八年的献俘大典是十一月二十五日举行的。Love you don't know how to live or die love you smelly shameless这部古装剧以幽默,诙谐的戏说样式,表现南宋末年忽必烈大一统中国时,南宋临安府(杭州)宰相贾似道以小虫治国到小虫亡国的过程.被世人称作蟋蟀宰相的贾似道是一个地地道道的玩家,原本只会玩虫,且只愿意玩虫的他,年少时就被父亲赶出了家门,后在心上人的威逼下走进了考场,无奈之下,他把自···Step 3: iPhone Enters DFU Mode Key Operation Comes!故事是漫畫中的特別篇〃信蜂和搭档〃