【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。
【判断题】Peak at the half height means half of the full peak width at base.
【单选题】Our result ( ) consistent with earlier findings showing that the best alloying addition is trivalent Ga. (10 分)
【判断题】一般纳税人首次购买税控系统专用备,抵减额为价税合计额。
【单选题】Which of the following does not belong to addition words?
【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.
【简答题】电路如下图所示,已知 。试求电容 两端的电压相量 。