变压器并联运行的条件是所有并联运行变压器的()。
A.变比相等
B.短路电压相等
C.绕组接线组别相同
D.中性点绝缘水平相当
参考答案:A, B, C
—Do you know the lady ____ is interviewing our headmaster?
—Yes, she is a journalist from CCTV.
A. which B. who C. whom
如何调整白片厚度差?