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【判断题】
将具有通带截止频率 f H 的有源低通滤波电路与具有通带截止频率 f L 的有源高通滤波电路相串联,当 f L > f H 时,可得有源带通滤波电路。A.
正确
B.
错误
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举一反三
【单选题】The war of Independence was between ( ).
A.
America and France
B.
America and Holland
C.
America and Spain
D.
America and Britain
【单选题】Sammy is from _____, so she is _____ girl. [ ]
A.
America, a America
B.
American, an America
C.
America, a n American
D.
American, an American
【单选题】Betty is from ______ and she is ______. [ ]
A.
America; American
B.
American; America
C.
America; America
D.
American; American
【单选题】The weather in China is different from ______ ．
A.
in America
B.
one in America
C.
America
D.
that in America
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