【单选题】_____ under the oak the next evening I said, "Our first fallacy tonight is called Ad Misericordiam."
【判断题】如图所示电路,二端网络输入的电流为 ,端电压为 ,则可判定N为为感性负载。( )
【单选题】无源二端网络如图所示。输入端的电压 u=220 cos ( 314t+20 ̊ ) V , 电流 i=220 cos ( 314t - 33 ̊ ) A ,试求此二端网络的由两个元件串联的等效电路的功率因数 cosφ= ,该网络的性质为 。
【单选题】听力原文:M: It's such a nice warm day. I think I'll go and write my report under the oak tree. W: I'd like to join you but I find it hard to concentrate outside, and I need to finish my paper this afterno...
A.
Go and read under the oak tree with the man.
B.
Go and write the report with the man.
C.
Stay at home and finish writing her report.
D.
Stay at home and finish writing her paper.
【单选题】What has Andy left to Red under the big oak tree?
【单选题】听力原文:M: It's such a nice warm day. I think I'll go and write my report under the oak tree. W: I'd like to join you but I find it hard to concentrate outside, and I need to finish my paper this afterno...
A.
Go and read under the oak tree with the man.
B.
Go and write the report with the man.
C.
Stay at home and finish writing her report.
D.
Stay at home and finish writing her paper.
【简答题】无源二端网络如图所示。输入端的电压 u=220 cos ( 314t+20 ̊ ) V , 电流 i=220 cos ( 314t - 33 ̊ ) A ,试求此二端网络的由两个元件串联的等效电路的功率因数 cosφ= ,该网络的性质为 。