【单选题】配电网一次接线中,我国不采用的是( )型接线。
【简答题】应对电焊机采取保护接地和保护接零的部分是()。 (A)一次接线端 (B)二次接线端 (C)输出电抗器 (D)机壳
【判断题】一次接线是指主变压器二次侧连接的母线。()
【单选题】Mrs Hand is a(n) woman. She hardly ever laughs.
【单选题】配电网一次接线中,我国不采用的是( )型接线。
【简答题】Mrs Smart is going to take her son, Clark, to see an eye doctor, but Clark has school in the morning and piano classes on Monday and Friday afternoons. And Mrs Smart is free (空闲)only in the afternoon....
【单选题】Mrs Smart is______teacher.