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【单选题】
下列选项中,关于助听器传统降噪技术中的高通滤波,叙述不正确的选项是
A.
基于噪声与言语信号相比含有更多低频成分的原理,滤波的方法是通过滤波器改变助听器的频率响应
B.
滤波保证高频信号通过衰减低频,以达到降低噪声的目的
C.
高频的降低主要是为了阻止和减少低频噪声上移的掩蔽作用
D.
多通道助听器一般每个通道分别有一个滤波器,通过调节各自滤波器以及相邻两个滤波器的交又频率
E.
对具有压缩线路的助听器,滤波器处于压缩反馈环路之前、之后和之中会对助听器的频率响应产生不同的影响
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【简答题】We did a lot of survey on the air pollution in the past.改为否定句 We ________ ________ a lot of survey on the air pollution in the past.
【简答题】“鞠躬尽瘁,具见开济老臣怀抱”是对()的评价
【单选题】Put the letter ______ he can find it easily.
A.
in which
B.
at which
C.
where
D.
which
【单选题】听力原文:W: I Can't bear the air pollution in this city any more. It's getting worse and worse. The sky looks grey most of the time. M: You said it! We've never had so many factories before. Q: What does ...
A.
The air pollution is caused by the development of industry.
B.
The city was poor because there wasn't much industry then.
C.
The woman's exaggerating the seriousness of the pollution.
D.
He might move to another city very soon.
【单选题】The question that puzzled us is _____ we can get rid of the air pollution in the area.
A.
that how
B.
how is it that
C.
what is it
D.
how it is that
【单选题】“鞠躬尽瘁,具见开济老臣怀抱”是对()的评价。
A.
诸葛亮
B.
韦庄
C.
冯正中
D.
魏征
【单选题】Woman: I can't bear the air pollution in this city any more. It's getting worse and worse. Man: You said it. We've never had so many factories before. Question: What does the man mean?
A.
The air pollution is caused by the development of industry.
B.
The city was poor because there wasn't much industry then.
C.
The woman's exaggerating the seriousness of the pollution.
D.
He might move to another city very soon.
【单选题】听力原文:W: I can't bear the air pollution in this city any more,It's getting worse and worse,The sky looks grey most of the time. M: You said it! We’ve never had so many factories before. Q: What does th...
A.
The air pollution is caused by the development of industry.
B.
The city was poor because there wasn't much industry then.
C.
The woman's exaggerating the seriousness of the pollution.
D.
He might move to another city very soon.
【单选题】Put the letter ______ he can find easily.
A.
in which
B.
at which
C.
where
D.
which
【简答题】根据我国《著作权法实施条例》第二条,著作权法所称作品,是指文学、艺术和科学领域内具有( )并能以某种有形形式复制的智力成果。
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