戴维宁定理说明任何一个线性有源二端网络N，都可以用一个等效电_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

戴维宁定理说明任何一个线性有源二端网络N，都可以用一个等效电压源即N二端子的（）和内阻R₀串联来代替。

答案

参考答案：开路电压

补全对话，情景问答

下面是Tangtang和 Baomihua之间的一殷对活,你能帮忙整理一下吗?

A. Did you have a nice trip?
B. Hello,Baomihua!
C. Thank you!
D. Hello,Tangtang. I missed you.
E. Yes,I had a great trip.

F. What did you do in Xi'an.
G. I  missed  you ,too.
H. I visited many places.
I. Yes,I  did. I bought this for you.
J. Did you go shopping?

Tangtang:
_______________

Baomi hua:
_________________

单项选择题

圆管断面直径由d1突然扩大到d2，若将一次扩大改为两级扩大，则该扩大的局部水头损失（）。

A、减小

B、不变

C、增大