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【单选题】
已知 U CC =12V, R E = 2kΩ, R B = 200kΩ , R L = 2kΩ ,晶体管 β=60 , U BE =0.6V, 信号源内阻 R S = 100Ω ,试求静态工作IE为( )mA 。A.
2.14
B.
4.28
C.
5.67
D.
7.82
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举一反三
【单选题】There is milk in the fridge. You need to buy some. [ ]
A.
a few
B.
a little
C.
few
D.
little
【单选题】There is milk at home. Let's go and buy some. [ ]
A.
few
B.
a few
C.
little
D.
a little
【单选题】Where is the Stemeresch Water Treatment Plant most likely located?
A.
Near a pond
B.
Near a lake
C.
Near the sea
D.
Near a river
【单选题】— Is the zoo near the park? — ____________. The zoo is near the bank. [ ]
A.
Maybe
B.
No
C.
Yes
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