【单选题】《动车组列车旅客运输管理办法》规定,站车客运人员应当具备()及以上文化程度。
【单选题】How did the woman get to the Peak?
【简答题】在题如图所示收音机接收回路中,u为接收信号。若已知L=0.26mH,调节C使电路在890kHz下产生串联谐振,试求C值。若天线接收到的信号为5μV时,电容两端的信号电压为0.4mV,求该回路的品质因数、通频带及回路中的电阻R。
【单选题】The peak season is _______________.
A.
the season to climb the peak
B.
the season to wear PEAK shoes
C.
the hot season of travelling
D.
the cold season of travelling
【单选题】{ In this half-wave rectifier circuit, determine the peak inverse voltage (PIV) across the diode. }
【判断题】The peak time tp corresponds to one-half cycle of the frequency of damped oscillation.
【单选题】Which peak is the highest peak of Mt.Huangshan?
【单选题】《动车组列车旅客运输管理办法》规定:列车发生影响旅客安全问题时,客运乘务组应当立即采取( ),保护旅客安全
【简答题】电路如下图所示,已知 。试求电容 两端的电压相量 。