______ hearing his father is dead,he fee 发布时间:2017-06-16 21:11 │ 来源:www.tikuol.com 题型:选择题 问题: ______ hearing his father is dead,he feels very sad. [ ]A. AtB. In C. UponD. To
题型:选择题 输电线路等效电路及参数如图4.3-10所示,已知末端电压U2=,末端负荷,始端功率为()MVA。A.14.645+j10.162B.18.845+j10.162C.15.645+j11.162D.20.65+j7.216 查看答案