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【单选题】
用微处理器对实序列做谱分析,要求频谱分辨率不超过 10Hz ,已知信号最高频率不超过 1KHz ,试问最少的采样点数 N 应该取: _________ 。A.
10
B.
20
C.
100
D.
200
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【简答题】Frau Bauer kauft ein__(1) ____ (lila)(2) Kleid.
【简答题】Je (ne pas prendre) __________ le repas.
【简答题】Frau Bauer kauft ein__ ____ (lila) Kleid.
【判断题】Frau Schröder ruft Frau Bauer an, um sich über Aushilfsarbeiten zu informieren.
A.
正确
B.
错误
【简答题】From the article, we get the information that " Reading can lower the risk of Alzheimer’s disease", do you think it is true? What kind of people have greater tendency to suffer from Alzheimer's diseas...
【判断题】This research question is a good one: " What main environmental, behavioral, and genetic factors predict whether Americans will develop diabetes, and how can these commonalities be used to aid the med...
A.
正确
B.
错误
【简答题】How to Protect Yourself from Coronavirus 1. The novel coronavirus is now a " public health emergency of international concern ," killing more than 1,600 people and infecting more than 69,000 worldwide...
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