【简答题】已知电路如图a所示,U S1 =20V,U S2 =10V,R 1 =4Ω,R 2 =6Ω,R 3 =12.6Ω,R 4 =10Ω,R 5 =4Ω,R 6 =6Ω,试用戴维南定理求解电阻R 3 中电流I。
【多选题】中国古典园林基本构成要素中最主要的因素有( )
【判断题】共轨内允许的短时最高压力为150MPa.
【单选题】In which speech did Martin Luther King quote from the Bible, saying that “We will not be satisfied until justice rolls down like waters and righteousness like a mighty stream”? (Lec.1, 02’55’’)
A.
“Where Do We Go From Here?”
D.
“The Birth of a New Nation”
【判断题】滴定分析中,浓度因数(F)是指滴定液实际配制浓度与规定浓度的比值,其范围应在0.95-1.05之间。
【简答题】1 What do we always think villagers are like in remote places? 2 Can people in remote villages be hostile to travellers? 3 What had they visited in the vicinity? 4 What did these churches contain? 5 W...
【单选题】Where did the stream ______?
【简答题】 题图电路中,已知U s1 =6V,U s2 =4V,R 1 =R 2 =1Ω,R 3 =4Ω,R 4 =R 5 =3Ω,R 6 =5Ω,选o点为参考点。求a,b,c,d各点电位。
【简答题】在图a电路中,R 1 =1Ω,R 2 =2Ω,R 3 =3Ω,R 4 =4Ω,R 5 =5Ω,I S6 =6A,试求电压U 5 。