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Components and wiring should be evenly distributed on the PCB as far as possible to avoid being too concentrated in a certain part of the PCB, especially DIP devices, which is not allowed.The ancients advocated "learning while learning" and "unity of knowing and doing", which means to practice and apply what one has learned. Among the hundreds of outstanding entrepreneurs I interviewed, including Jack Ma, I found that everyone has his own unique learning methods and habits. Among them, purposeful learning and deliberate practice and practice in work and life are in deep agreement with this book.从未被劫的银行，三千万无记认钞票，引爆连环盗计。一群以梅雷亚（巴勃罗·施瑞博尔 饰）为首的高智罪犯，手法高超、火力强横、而且沉迷打劫；纵使犯案累累，却甚少破绽，令警方束手无策。一次押款车劫案后，他们的党羽唐尼（奥谢拉·杰克逊 饰）被辣手神探尼克（杰拉德·巴特勒 饰）识破，更从他身上知道匪帮下一个目标，是攻破从未遇劫的洛杉矶联邦储备银行，从中盗取三千万即将销毁的旧钞！于是尼克布下天罗地网，想趁机把他们一网成擒。然而，魔高一丈；梅雷亚以声东击西之法，引开警方注意。尼克错失擒获他们的良机，唯有尾随追击，双方展开连场枪战。虽然最终截获贼匪，但赃款竟全数不翼而飞！局中有局，究竟谁是取得巨款的幕后赢家？I nodded at this passage, Understand that what Zhang Xiaobo said is indeed reasonable, It is not a lie, Here I think it is necessary to give you one thing about popular science. So we have to say something digressive: The result of a real bullet hitting a petrol tank is not the same as that shown in most movies. One shot can explode the petrol tank, But this is not the case, Although a pure metal projectile will rub against the air at a speed of hundreds of meters per second to generate equivalent heat, And will produce sparks after hitting the metal oil drum, But none of this is enough to ignite petrol, Especially for gasoline with a large total amount, to ignite gasoline, please remember one thing-open flame must be used. In addition, gasoline is a flammable item, but it is not an explosive item in the true sense. Only after reaching a certain total amount can explosion be caused. If the total amount is insufficient, it can only cause combustion without explosion.221. X.X.132一日，东京八十万禁军教头林冲，携娘子张贞娘去庙里进香。太尉高俅之子高衙内乘林冲不在，调戏贞娘。林冲赶到，见是高衙内，没敢作声，带贞娘归。