Operational amplifiers, used primarily in analog circuits, are characterized by（）<br>A:high input impedance, high gain and low output impedance<br>B:high input impedance, high gain and high output impedance<br>C:low input impedance, low gain and high output impedance<br>D:low input impedance, high gain and low output impedance

Operational amplifiers, used primarily in analog circuits, are characterized by（）
A:high input impedance, high gain and low output impedance
B:high input impedance, high gain and high output impedance
C:low input impedance, low gain and high output impedance
D:low input impedance, high gain and low output impedance

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