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【单选题】
如果两个信号分别通过系统函数为 H(jw)的系统后,得到相同的响应,那么这两个信号(  )
A.
一定相同
B.
一定不同
C.
只能为零
D.
可以不同
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C.
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D.
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A.
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B.
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D.
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A.
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B.
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A.
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B.
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C.
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D.
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