题型:填空题 Mrs Smith and her twins _____ the dancing club.[ ]A. is going to joinB. is going to join inC. are going to join D. are going to join in 查看答案
题型:填空题 对干式电抗器绝缘电阻出厂验收要求有()。A.使用2500V兆欧表摇测,绕组绝缘电阻不小于1000MΩB.使用2500V兆欧表摇测,绕组绝缘电阻不小于1500MΩC.使用500V兆欧表摇测,铁芯对夹件及地绝缘电阻不小于100MΩD.使用500V兆欧表摇测,铁芯对夹件及地绝缘电阻不小于200MΩ 查看答案