通过学习我们知道，家庭电路的电压是_1V，一节干电池的电压是_2V，对人安全的电压一般不高于_3V．_刷题宝

题干

通过学习我们知道，家庭电路的电压是____ V，一节干电池的电压是____ V，对人安全的电压一般不高于____ V．

上一题下一题 0.0难度选择题更新时间:2019-03-21 07:08:36

答案(点此获取答案解析）

220,1.5,36

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A

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