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一、有关自然现象的问题例1在水深超过200 m的深海中,光线极少,能见度很低.有一种电鳗具有特殊的适应性,能通过自身发出生物电.若该电鳗的头尾相当于两个电极,它在海水中产生的电场强度达到
I. Problems relating to natural phenomena Example 1 In the deep sea where the depth of water exceeds 200 m, there is very little light and visibility is very low. There is a type of electricity that has special adaptability and can emit biological electricity through itself. Equivalent to two electrodes, its electric field strength in seawater reaches