哪一种频率的交流电危害性最大 A.50—60Hz B.60—100Hz C.10 发布时间:2017-07-20 15:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 哪一种频率的交流电危害性最大A.50—60Hz B.60—100Hz C.100—150HzD.150—200Hz E.>200Hz
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