题目内容

_______ my past language learning experiences, I have come to realize that practice makes perfect.

A. Muddling through
B. Reflecting on
C. Setting foot in
D. Being concerned with

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Our university enrolls more students than our city's other two colleges _______.

A. combined
B. being combined
C. combining
D. combine

已知三级放大电路各级放大倍数分别为-20、50、1，若输入电压ui=5mV，求输出电压uo为（)V。

A. 50
B. 5
C. -5
D. -50

多级放大电路的输入电阻就是最后一级的输入电阻。

A. 对
B. 错

多级放大电路的输出电阻就是最后一级的输出电阻。

A. 对
B. 错