题目内容

对于线性电路,可以利用叠加定理计算( )或( ),不能用于计算( )。

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戴维宁等效电路是指一个有源二端网络可以用()和一个()的串联组合等效,其中电阻值等于原有源二端网络除源后的(),电压源的电压等于原有源二端网络的()电压。

Q: How many electives will the woman take for next semester?[音频]

A) 3.
B) 4.
C) 5.
D) 6

2.Q: How long does it take to cycle from the teaching building to the library?[音频]

A) About 5 minutes.
B) About 10 minutes.
C) About 15 minutes.
D) About 20 minutes

3.Q: How many pages does the novel have?[音频]

A) 430.
B) 440.
C) 450.
D) 460.

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