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【多选题】
关于窗函数法设计 FIR 数字滤波器,下面的哪些说法是正确的?A.
增加窗长可以减小过渡带宽
B.
增加窗长可以增加阻带衰减
C.
改变窗形状可以改变阻带衰减
D.
改变窗形状可以改变过渡带宽
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皮皮学刷刷变学霸
举一反三
【单选题】If you took more than your share of the money, you should at once ______ by returning the extra.
A.
give up
B.
make amends
C.
feel ashamed
D.
get punished
【单选题】抗日战争胜利后,一些民主党派领导人坚持“中间路线”的实质是( )
A.
介于国民党和共产党之间的第三条道路
B.
以实行政权民主化和军队国家化为目标的路线
C.
仿效西方民主,走旧民主主义的老路
D.
反对暴力革命,主张政治改良
【单选题】Unless they are programmed by humans, computers are nothing more than big pieces of metal. But once _____ what to do, they show extraordinary power in carrying it out.
A.
taught
B.
teaches
C.
teaching
D.
to teach
【单选题】_________had he gone to sleep than the telephone rang once more.
A.
As soon as
B.
No sooner
C.
Hardly
D.
Scarcely
【简答题】若数据采集器的波特率为9600 bps,数据位为8,奇偶校验为无,停止位为1,若对数据采集器进行设置,键入命令为:
【简答题】创业过程的发端是
【单选题】It will be more than 100 years ____ the country begins once again to look as it did before.
A.
when
B.
since
C.
before
D.
that
【单选题】But it will be more than 100years _______ the country begins once again to look as it did before. [ ]
A.
since
B.
that
C.
when
D.
before
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