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单选题

An operational amplifier, as used in today‘s consoles, has a calculated gain of 5. This means that when the input changes_____.

A10 volts,the output changes 2 volts

B5 volts,the output changes 10 volts

C2 volts, the output changes 10 volts

D10 volts, the output changes 5 volts

正确答案:A (备注:此答案有误)

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