【简答题】A.The language they are written in is not widely known. B.They cannot be moved from where they were found C.The writing in them has faded D.Many people want credit for the discovery.
【简答题】Yd联结的三相变压器,一次绕组加额定电压空载运行,将二次绕组的闭合三角形打开,用电压表测量开口处电压;再将三角形闭合,用电流表测量回路电流。问在三相变压器组和三相心式变压器中,各次测得的电压、电流有何不同?为什么?
【单选题】Tony, tell me the result of the discussion ______ you had with your dad yesterday.
【单选题】I cannot tell the ______ difference between the twins.
【单选题】遇到难缠患者时,下列哪项措施欠妥
A.
对于表现极端焦虑或富有侵犯性的患者,应考虑是否需要心理治疗及药物缓解
B.
在应付难缠患者时,医生应该能够坚守住底线,不能无原则让步
C.
医生感到一个人难解决时,应寻求同事或医院的帮助
D.
为了不影响医院整体工作,准备与患者及家属协商私下解决,答应对方要求
【简答题】变压器二次绕组开路、一次绕组加额定电压时,虽然一次绕组电阻很小,但一次电流并不大,为什么? Z m 代表什么物理意义?电力变压器不用铁心而用空气心行不行?
【单选题】Babies are not born with __ moral sense; they cannot tell __ difference between right and wrong.
【判断题】所谓变压器的空载运行就是变压器一次绕组加额定电压、二次绕组开路的工作状态。