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【单选题】
高保真音箱的信噪比应答到（）DB以上
A.
80
B.
90
C.
100
D.
110
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【单选题】Dear Mr. Smith: Thank you very much for your inquiry dated December 12, 2002. I am glad to tell you that we are an outstanding hi-tech company specializing in telephone facilities and are able to of...
A.
telephone recorders
B.
exclusive products
C.
telephone facilities
D.
mobile telephones
【单选题】信噪比S／N为10：1是指C.药物中
A.
定量分析方法的检测限
B.
定量分析方法的定量限
C.
药物中杂质检查
D.
制剂的含量表示方法
E.
定量分析方法浓度与信号的关系
【单选题】Task 2Directions: This task is the same as Task 1．The 5 questions or unfinished statements are numbered 41 through 45.Dear Mr．Smith: Thank you very much for your inquiry dated December 12, 2002．I am g...
A.
telephone recorders
B.
telephone facilities
C.
exclusive products
D.
mobile telephones
【单选题】信噪比越大则______。
A.
有用信号的成分越大，噪声的影响越小
B.
有用信号的成分越大，噪声影响越大
C.
有用信号的成分越小，噪声影响越小
D.
有用信号成分越小，噪声影响越大
【单选题】Dear Mr. Smith: Thank you very much for your inquiry dated December 12, 2002. I am glad to tell you that we are an outstanding hi-tech company specializing in telephone facilities and are able to of...
A.
first one
B.
third one
C.
second one
D.
fourth one
【单选题】关于信噪比的叙述，正确的是
A.
信噪比是评价电子设备的一项重要的技术指标
B.
信噪比越大，噪声对信号影响越大
C.
信噪比越大，信息传递质量越低
D.
噪声对信号影响越大，信号传递质量就越高
E.
噪声无处不在，是检测性的概念
相关题目：
【单选题】Dear Mr. Smith: Thank you very much for your inquiry dated December 12, 2002. I am glad to tell you that we are an outstanding hi-tech company specializing in telephone facilities and are able to of...
A.
telephone recorders
B.
exclusive products
C.
telephone facilities
D.
mobile telephones
【单选题】信噪比S／N为10：1是指C.药物中
A.
定量分析方法的检测限
B.
定量分析方法的定量限
C.
药物中杂质检查
D.
制剂的含量表示方法
E.
定量分析方法浓度与信号的关系
【单选题】Task 2Directions: This task is the same as Task 1．The 5 questions or unfinished statements are numbered 41 through 45.Dear Mr．Smith: Thank you very much for your inquiry dated December 12, 2002．I am g...
A.
telephone recorders
B.
telephone facilities
C.
exclusive products
D.
mobile telephones
【单选题】信噪比越大则______。
A.
有用信号的成分越大，噪声的影响越小
B.
有用信号的成分越大，噪声影响越大
C.
有用信号的成分越小，噪声影响越小
D.
有用信号成分越小，噪声影响越大
【单选题】Dear Mr. Smith: Thank you very much for your inquiry dated December 12, 2002. I am glad to tell you that we are an outstanding hi-tech company specializing in telephone facilities and are able to of...
A.
first one
B.
third one
C.
second one
D.
fourth one
【单选题】关于信噪比的叙述，正确的是
A.
信噪比是评价电子设备的一项重要的技术指标
B.
信噪比越大，噪声对信号影响越大
C.
信噪比越大，信息传递质量越低
D.
噪声对信号影响越大，信号传递质量就越高
E.
噪声无处不在，是检测性的概念
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