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【单选题】
某负反馈放大器的开环电压放大倍数为200,电压反馈系数为0.1,那么它的闭环电压放大倍数约为( )。A.
200
B.
20
C.
10
D.
2000
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举一反三
【单选题】In the police station, I saw the man from _____ room the thief had stolen the TV set. [ ]
A.
whom
B.
that
C.
which
D.
whose
【单选题】In the police station I saw the man from __________ room the thief had stolen the TV set.
A.
whom
B.
which
C.
that
D.
whose
【单选题】In 'I saw a thief stealing something', the italicized part is
A.
a predicate.
B.
an attribute.
C.
a complement.
D.
an adverbial.
【单选题】I call the police for help I saw the thief.
A.
while
B.
before
C.
as soon as
D.
after
【单选题】I prefer ______ to ______. [ ]
A.
running; swim
B.
swim; running
C.
running; swimming
D.
swim; run
【单选题】In the police station, I saw the man from ______room the thief had stolen the TV set.
A.
whose
B.
whom
C.
which
D.
that
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