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【单选题】
某放大电路中BJT的三个电极的对地电位分别为 ,则下列说法中正确的是_________.
A.
A为集电极，B为发射极，C为基极，该三极管为NPN型锗材料三极管
B.
A为集电极，B为发射极，C为基极，该三极管为NPN型硅材料三极管
C.
A为发射极，B为集电极，C为基极，该三极管为PNP型锗材料三极管
D.
A为发射极，B为集电极，C为基极，该三极管为PNP型硅材料三极管
E.
A为发射极，B为集电极，C为基极，该三极管为NPN型锗材料三极管
F.
A为发射极，B为基极，C为集电极，该三极管为PNP型锗材料三极管
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