任何带电设备在检修或搬运前,都必须先切断(),并进行接地。 A.开关 B.继电器 C 发布时间:2018-02-08 13:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 任何带电设备在检修或搬运前,都必须先切断(),并进行接地。A.开关B.继电器C.电源D.电线
题型:单项选择题 In China, many graduates end up in a job_____they are not suited.A.whichB.with whichC.in whichD.to which 查看答案
题型:单项选择题 6. As there is less and less coal and oil, scientists are exploring new ways of making use of energy, such as sunlight, wind and water for power and fuel.A.primaryB.alternativeC.instantD.unique 查看答案