A.includedB.questionedC.examinedD.involved
A. included
B. questioned
C. examined
D. involved
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A.moveB.rateC.ratioD.pace
A. move
B. rate
C. ratio
D. pace
某一电压放大电路,当输出端开路时,输出电压为5V,当接上2kΩ负载时,输出电压下降为4V,该电路的输出电阻R是0.5KΩ。()
当电压、电流采用关联方向时,P大于零,则该段电路提供功率。()