当氢冷发电机密封油温过高时,将()发电机的氢气纯度。 A.不影响 B.降低 C.改变 发布时间:2021-01-02 19:54 │ 来源:www.tikuol.com 题型:单项选择题 问题: 当氢冷发电机密封油温过高时,将()发电机的氢气纯度。A.不影响B.降低C.改变D.提高
题型:单项选择题 There was a little trouble but______ things were soon quiet.[ ]A. first of all B. at the first C. firstly D. at first 查看答案