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【单选题】
DSB系统与SSB系统的抗噪声性能相比较,正确的关系是( )。
A.
DSB比SSB好3dB
B.
DSB比SSB好6dB
C.
DSB比SSB差3dB
D.
DSB与SSB相同
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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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【单选题】( )是数据速率为100Mb/s的双绞线以太网。
A.
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B.
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C.
100BASE-T
D.
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A.
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B.
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C.
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【简答题】Itinerary Assignment.docx
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A.
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B.
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C.
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D.
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A.
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B.
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