- 搜标题
- 搜题干
- 搜选项
单项选择题
An op-amp bandpass active filter provides a constant output （ ）.
A.
from dc to
An op-amp bandpass active filter provides a constant output （ ）.
A.
from dc to 
B.
for all frequencies higher then 
C.
from 
to 
D.
from dc to infinite frequency
