第一页第四题 答案请改成A 一个国外网站写的... Nerves and blood vessels carry relatively more current with less heat generation, whereas bone tends to convert more of the electrical energy into heat. 另外一句 For this reason, the thermal damage caused by a current passing up through an upper extremity is concentrated at the wrist and elbow, the places with less tissue cross-sectional area and more resistive structures (bone and tendon). 所以好像是骨头受伤害比较多耶... 跟共笔上写的不一样= = 参考的网站：http://www.emedicine.com/derm/topic859.htm --

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