在三相四线制的供电线路中,已知电压为 380V/220V , (1) 三相负载对称均 为 Z = 12+j6 Ω ,求各线电流及中线电流,并作相量图; (2) 三相阻抗分别为 Z A = 12+j6 Ω , Z B =6+j9 Ω , Z C =18+j30 Ω , 求各线电流及中线电流,并作相量图。
favorite We all like Mary ___________ she is a hardworking student. Hello,boys and girls!Let's ___________ to read the text of Unit Swimming is my ____________ sport. Not all of us ___________ pop music. Please _____________ your new books here tomorrow.
【简答题】选词填空 A.begin B.bring C.because D.like E.favorite We all like Mary ___________ she is a hardworking student. Hello,boys and girls!Let's ___________ to read the text of Unit 3. Swimming is my ______...