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【单选题】
根据斯特()采样定理对一个 带限或者带宽有限 信号 进行均匀理想采样得到采样信号 ,设 的最高截止频率为 ,如果采样频率 满足 时,则可由采样后信号精确地重建原信号,否则会产生频谱混叠现象。A.
无任何要求
B.
采样频率大于等于信号截止频率
C.
采样频率大于等于 2倍信号截止频率
D.
采样频率小于等于 2倍信号截止频率
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【单选题】London's First Light Rail System The Docklands Light Railway (DLR) took just three years to build at a cost of ￡77 million. It is London's first Light Rail System, but its route follows that of a numb...
A.
was constructed in the nineteenth century.
B.
will be finished in three years' time.
C.
follows some of the original lines.
D.
took three years longer than expected to complete.
【判断题】A total of 24 million dollars in cash from wallets and purses was handed in.
A.
正确
B.
错误
【单选题】London's First Light Rail System The Docklands Light Railway (DLR) took just three years to build at a cost of￡77 million. It is London's first Light Rail System, but its route follows that of a numbe...
A.
was constructed in the nineteenth century.
B.
will be finished in three years' time.
C.
follows some of the original lines.
D.
took three years longer than expected to complete.
【多选题】依据我国《涉外民事关系法律适用法》的规定，遗嘱方式所适用的法律有
A.
遗嘱人立遗嘱时经常居所地法
B.
遗嘱人死亡时国籍国法
C.
遗嘱人立遗嘱时国籍国法
D.
遗嘱行为地法
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