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【多选题】
任意一对输入信号都可以分解为一对差模信号和一对共模信号的和。若两个输入信号ui1=10mV,ui2=0mV,则有:A.
差模信号为uid=10mV
B.
共模信号为uic=5mV
C.
差模信号为uid=20mV
D.
共模信号为uic=10mV
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A.
a sustained species
B.
a threaten to the environment
C.
the world’s dominant power
D.
a misplaced race
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【单选题】The IUCN s 'Red Lisf' suggest that human beings are
A.
a sustained species.
B.
the world's dominant power.
C.
a threat to the environment.
D.
a misplaced race.
【单选题】The IUCN’s “Red List” suggest that human being are
A.
[A] a sustained species
B.
[B] a threat to the environment
C.
[C] the world’s dominant power
D.
[D] a misplaced race
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