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【单选题】
电路如图所示,该电路的电压放大倍数为( )。A.
β Rc/rbe
B.
- β Rc/rbe
C.
1
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举一反三
【单选题】In ancient China, a gold dragon on the emperor’s clothes was regarded as a _____ of power and position.
A.
mark
B.
sign
C.
symbol
D.
feature
【单选题】The purpose of George Spilich's experiments is_____.
A.
to test whether smoking has a positive effect on the mental capacity of smokers
B.
to show how smoking damages people's mental capacity
C.
to prove that smoking affects people's regular performance
D.
to find out whether smoking helps people's short-term memory
【单选题】In the Westerner’s eyes, the postwar Japan was______.
A.
under aimless development
B.
a positive example
C.
a rival to the West
D.
on the decline
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