()是通过隔离变压器实现工作回路与其他电气回路的电气隔离,将接地电网转换为范围很小的 发布时间:2018-01-01 15:30 │ 来源:www.tikuol.com 题型:单项选择题 问题: ()是通过隔离变压器实现工作回路与其他电气回路的电气隔离,将接地电网转换为范围很小的不接地电网。A.双重绝缘B.安全电压C.电气隔离D.漏电保护
题型:单项选择题 There is something wrong with her eyes. She can _____ see anything. [ ]A. nearly B. already C. almost D. hardly 查看答案