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【单选题】
In the common-emitter amplifier cirtuit, the base terminal of the transistor serves as the input, the collector is the output, and the ommanto both.and the () common to both.A.
base
B.
emitter
C.
collector
D.
substrate
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举一反三
【单选题】Joseph is so brilliant that he always keeps some good ideas ______ his sleeve.
A.
up
B.
in
C.
at
D.
on
【简答题】adj. behaving in a polite, kind, and generous way, especially to people of a lower rank
【简答题】a person with a lower rank or status. (n.)