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[单选题]
晶体三极管共发射极的电流放大倍数β为()
A.Ie/Ib
B.IC/Ib
C.△Ie/△Ib
D.△IC/△Ib
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A.Ie/Ib
B.IC/Ib
C.△Ie/△Ib
D.△IC/△Ib
第1题
A.Ie=Ib+IcIb=βIc
B.Ic=Ib+IeIb=βIc
C.Ie=Ib+IcIc=βIb
D.Ic=Ib+IeIb=βIc
第3题
A、Ic=Ie+Ib
B、Ib=Ie+Ic
C、Ib=Ic-Ie
D、Ie=Ib+Ic
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