轴温报警仪的数字温度传感器常态下用500V兆欧表测绝缘,绝缘电阻应大于()。 发布时间:2017-07-23 22:36 │ 来源:www.tikuol.com 题型:填空题 问题: 轴温报警仪的数字温度传感器常态下用500V兆欧表测绝缘,绝缘电阻应大于()。
题型:填空题 The research mainly deals with the difficulty the students have ________ their attention on their study all the time.[ ]A.to focus B.to be focusedC.focusing D.focused 查看答案