一个外加电压为U的R、L、C串联电路,其谐振频率为()。
A.f0=1/LC;
B.f0=1/ωLC;
C.f0=1/2πLC;
D.f0=1/2LC。
参考答案:C
I could feel my heart beating violently ______ I went on the stage to sing a song.
A.for the first time
B.by the time
C.every time
D.from time to time
T+N品种的延期补偿费每()支付一次,延期补偿费支付日的延期费率为()。
A.1个月/万分之2
B.2个月/万分之2
C.2个月/百分之1
D.1个月/百分之1