A.Thanks for coming to see me
B.You look great
C.You are so tired
D.Don’t mention it
第1题
A.anelectriccircuit
B.amagneticfield
C.anelectricfield
D.acouplingcircuit
第2题
A.motoring
B.generating
C.plugging
D.stopping
第3题
A.1000
B.900
C.700
D.600
第4题
A.positivefeedbacknetworks
B.largeopen-circuitgain
C.negativefeedbacknetworks
D.smalloutputimpedance
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