两变压器容量、短路阻抗相同,当差30度角并列时,其环流为变压器出口三相短路电流的() 发布时间:2019-02-07 01:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 两变压器容量、短路阻抗相同,当差30度角并列时,其环流为变压器出口三相短路电流的()倍。A、1/2B、1/3C、1/4D、1/5
题型:单项选择题 Which of the following statements is true according to what you have heard a. I will eat lunch very quickly. b. I will have lunch before the meeting. c. I will eat lunch at the meeting. d. I will eat lunch while jogging. 查看答案
题型:单项选择题 下图所示为绘制于唐朝初期的敦煌壁画,描绘了张骞辞别汉武帝,踏上出使西域漫漫征途的情景。有人认为:“严格说来,张骞开通丝绸之路属‘无心之举’,因为他最初的目的仅是为了联合盟友共同抗击匈奴”。其认识历史的视角是()A.动机与效果B.目的与手段C.背景与影响D.原因与结果 查看答案