【单选题】为了能够正确测量故障点到保护安装处的距离,反应相间短路的阻抗继电器采用( )接线。
【单选题】某病人因发热38.5℃、全身有小出血点、头晕乏力入院,经医院查血红蛋白80g/L,红细胞3×10 9 /L,血小板70×10 9 /L,骨髓检查示多部位增生不良,确诊为再生障碍性贫血。本病急性型引起死亡的主要原因是()。
【简答题】阅读理解:阅读下面的短文,根据文章内容进行判断,正确为“T”,错误为“F”。 An ebook (also referred to as an electronic book, eBook, or e-book) is a digital version (版本)of a print book that you download and read. But if you want to read ...
【简答题】An ebook(also referred to as an electronic book,eBook,or e-book)is a digital version(版本)of a print book that you download and read. But if you want to read an ebook, you must have an Ebook Reader, whi...
【单选题】The Ebook Reader is used for______.
A.
reading an ebook you've downloaded
B.
turning a print book into a digital version
C.
downloading an ebook from the Internet
D.
copying an ebook onto a portable computer
【判断题】为使接地距离保护的测量阻抗能正确反映故障点到保护安装处的距离应引入补偿系数K=(Zo-Z1)/3Zo 。( )
【简答题】The Ebook Reader is used for___________. A) reading an ebook you’ve downloaded B) turning a print book into a digital version C) downloading an ebook from the Internet D) copying an ebook onto a porta...
【判断题】利用故障环路上的电压和环路中流通的电流作为测量电压和测量电流所算出的测量阻抗,能够正确反应保护安装处到故障点的距离。