【判断题】
导线接头接触不良往往是电气事故的根源。
A. 对
B. 错
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答案
A
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【判断题】
SS4型电力机车低压试验准备工作之一：将逆变电源选择开关置A或B，并将相应的钮子开关打向工作位，主台显示屏“前节车”、“后节车”、“预备”、“主断”和“零压”灯亮。
A. 对
B. 错
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下列关于收养的表述错误的是___
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D. 可以向民政部门申请裁决，要求增加抚养费
