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【单选题】
已知某BJT的伏安特性曲线如下图所示,由图可确定该管的共发射极直流电流放大系数 =(),交流电流放大系数 =( )。正确答案为为( )。A.
40、40
B.
40、37.5
C.
37.5、37.5
D.
37.5、40
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举一反三
【单选题】If a bond is capitalized over a period greater than one year (one period), it involves the calculation of compound interest.
A.
True
B.
False
【单选题】( )4.It takes the earth one year one orbit around the sun.
A.
finish
B.
finishing
C.
to finish
D.
finished
【单选题】The fridge is _____for one year. It means that the company that makes it promises to repair or replace it if it breaks within a year.
A.
satisfied
B.
guaranteed
C.
recognized
D.
proved
【单选题】How long will it take experts to agree how to measure obesity?
A.
Half a year.
B.
One year.
C.
One and a half year.
D.
Two years.
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