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雷电成因与地球电场之迷、刘永利电闪雷鸣是夏天阴雨天气常见的自然现象,对这种司空见惯的自然景观您知道它的成因吗?大概谁都知道雷电是带正电的云与带负电的云相撞击的结果。可是云块是怎样具有正负电性就不是人人都能解释通的神密问题了。记得中学老师在做摩擦起电实...
Causes of lightning and the fans of the Earth's electric field, Liu Yongli Thunder and lightning is a common summer natural phenomenon of rainy weather, for this common natural landscape do you know its cause? Everyone knows that lightning is the result of collisions with positively charged clouds and negatively charged clouds. However, what is the cloud with positive and negative electricity is not everyone can explain the pass of the secret problem. I remember middle school teachers doing friction electrification real ...