电力系统潮流计算中,功率指
A.一相功率
B.两相功率
C.三相功率
D.四相功率
参考答案:C
— Do you know _____?
— For two days. [ ]
A. how long was Nancy back
B. how long Nancy was back
C. how long has Nancy been back
D. how long Nancy has been back
()是晚唐第一大家。
A、杜牧
B、李贺
C、刘禹锡
D、李商隐