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【单选题】
若DSB调制系统的输入信噪比为300,则输出信噪比为( )A.
600
B.
200
C.
100
D.
300
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举一反三
【单选题】The manager was very angry, for he had sent his business partner two thousand machines yesterday, half of _________ unqualified.
A.
them
B.
what
C.
which
D.
whom
【单选题】The manager was very angry, for he had sent his business partner two thousand machines yesterday, half of_____ unqualified.
A.
whom
B.
what
C.
them
D.
which
【单选题】He was unqualified and totally __________.
A.
inexperienced
B.
experienced
C.
experiencing
D.
experience
【简答题】The manager was very angry，for he had sent his business partner two thousand machines yesterdy，half of unqualified． A．whom B what C them D．which
【单选题】.The manager was very angry,for he had sent his business partner two thousand machines yesterdy,half of___ unqualified.
A.
who
B.
what
C.
them
D.
which
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