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【单选题】
要想提高放大器的输入阻抗，并且稳定输出电流，应引入()负反馈。A.
电压串联
B.
电压并联
C.
电流串联
D.
电流并联
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反馈参考答案：
举一反三
【单选题】Which of the following would be the best title for the passage?
A.
Losing altitude in air cargo shipment.
B.
Saying 'no thanks' to overnight air.
C.
Customer, the king ruled.
D.
Exempting freight from scrutiny.
【单选题】Her action disagrees with what she has said, ?
A.
does she
B.
doesn't she
C.
does it
D.
doesn't it
【单选题】In order for a stand-on vessel to take action in a situation, she must determine that the other vessel ______.
A.
is restricted in her ability to maneuver
B.
has sounded the danger signal
C.
is not taking appropriate action
D.
has not changed course since risk of collision was determined
【单选题】The woman's action before leaving the store shows that she ________.
A.
was sorry for what she had done
B.
was afraid she would be arrested
C.
decided she didn't want what she had picked up
D.
wanted to prove she had not intended to steal anything
【单选题】—What kind of movies does she __? —She ____ action movies. [ ]
A.
like, like
B.
likes, likes
C.
like, likes
D.
likes. like
【单选题】She follows order well, but she seldom______ action.
A.
unifies
B.
implores
C.
initiates
D.
innovates
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