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【单选题】
直接计算序列x(n)的256点DFT,需要复数乘法次数为:A.
256
B.
256×256
C.
256×255
D.
128×8
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A.
援助者安排在出口处或需要帮助的旅客旁边就坐
B.
担架旅客安排在最后三排
C.
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D.
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A.
0100H
B.
010EH
C.
OOFEH
D.
0102H
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