同相比例运算电路中集成运算放大器的反相输入端为虚地。()
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The problem with OPECs promise to increase production lies in that______.
A. OPEC is running out of oil
B. OPEC members are quota-bound
C. OPEC is already producing at near full capacity
D. the IE A controls production, not OPEC
在运算电路中，集成运算放大器的反相输入端均为虚地。()
对于任何一个逻辑函数来讲，其真值表都是唯一的。()
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